Installed Plugins aren't listed

Hello,

first of all sorry for my bad english…

I have just installed Openfire 3.9.3 on my server (debian 7).

When I add a plugin from the “available Plugins”-list, it takes some seconds to install untill it turns green,

and afterwards if i look under “Plugins” there it says that i haven’t installed any plugins.

In the “Available Plugins”-list i am also not able to add this plugin any more,

instead of the plus there is no icon now.

I have already tried to reinstall openfire, also tried to manually add the plugins with the “Upload Plugin”-form in “Plugins”,

also tried to add it directly to /var/lib/openfire/plugins … always the same result…

Is someone else also having this problem or does anyone know an answer to this?

Thanks,

Raphael

Can you provide some log files error.log and warn.log it logs directory.

Write your own plug-ins or downloads in the community?

Hello,

of course, here are the logfiles:

The files show the messages from the installation of openfire and from the installation of the plugins.

The plugins i used here are the ‘Registration’ and ‘User Import Export’ plugins from the ‘available plugins’-list in the openfire admin-panel,

so none of them are written or modified by myself. Also tried to manually install them as written before, but they still aren’t listed…

warn.log:

2014.11.17 12:47:26 org.jivesoftware.util.log.util.CommonsLogFactory - Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.
2014.11.17 12:47:27 org.jivesoftware.util.log.util.CommonsLogFactory - Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.
2014.11.17 12:47:28 org.jivesoftware.util.log.util.CommonsLogFactory - Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.
2014.11.17 12:47:28 org.jivesoftware.util.log.util.CommonsLogFactory - Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended.

error.log:

2014.11.17 12:46:56 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.http.HttpBindManager.createSSLConnector(HttpBindManager.java:210)
     at org.jivesoftware.openfire.http.HttpBindManager.configureHttpBindServer(HttpBindManager.java:506)
     at org.jivesoftware.openfire.http.HttpBindManager.start(HttpBindManager.java:163)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl.startHTTPBindListeners(ConnectionManagerImpl.java:564)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl.startListeners(ConnectionManagerImpl.java:180)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl.access$000(ConnectionManagerImpl.java:97)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl$1.pluginsMonitored(ConnectionManagerImpl.java:152)
     at org.jivesoftware.openfire.container.PluginManager.firePluginsMonitored(PluginManager.java:568)
     at org.jivesoftware.openfire.container.PluginManager.access$800(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1084)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:46:56 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.http.HttpBindManager.createSSLConnector(HttpBindManager.java:210)
     at org.jivesoftware.openfire.http.HttpBindManager.configureHttpBindServer(HttpBindManager.java:506)
     at org.jivesoftware.openfire.http.HttpBindManager.start(HttpBindManager.java:163)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl.startHTTPBindListeners(ConnectionManagerImpl.java:564)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl.startListeners(ConnectionManagerImpl.java:180)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl.access$000(ConnectionManagerImpl.java:97)
     at org.jivesoftware.openfire.spi.ConnectionManagerImpl$1.pluginsMonitored(ConnectionManagerImpl.java:152)
     at org.jivesoftware.openfire.container.PluginManager.firePluginsMonitored(PluginManager.java:568)
     at org.jivesoftware.openfire.container.PluginManager.access$800(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1084)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:47:08 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:303)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:47:08 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:303)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:47:09 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:519)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:47:09 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:519)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:47:43 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at org.jivesoftware.openfire.container.PluginManager.installPlugin(PluginManager.java:195)
     at org.jivesoftware.openfire.update.UpdateManager.downloadPlugin(UpdateManager.java:284)
     at org.jivesoftware.openfire.update.PluginDownloadManager.installPlugin(PluginDownloadManager.java:68)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:622)
     at uk.ltd.getahead.dwr.impl.ExecuteQuery.execute(ExecuteQuery.java:248)
     at uk.ltd.getahead.dwr.impl.DefaultExecProcessor.handle(DefaultExecProcessor.java:48)
     at uk.ltd.getahead.dwr.impl.DefaultProcessor.handle(DefaultProcessor.java:81)
     at uk.ltd.getahead.dwr.AbstractDWRServlet.doPost(AbstractDWRServlet.java:162)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:936)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:801)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:224)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:47:56 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:48:16 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:48:36 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:48:56 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:16 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:26 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at org.jivesoftware.openfire.container.PluginManager.installPlugin(PluginManager.java:195)
     at org.jivesoftware.openfire.update.UpdateManager.downloadPlugin(UpdateManager.java:284)
     at org.jivesoftware.openfire.update.PluginDownloadManager.installPlugin(PluginDownloadManager.java:68)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:622)
     at uk.ltd.getahead.dwr.impl.ExecuteQuery.execute(ExecuteQuery.java:248)
     at uk.ltd.getahead.dwr.impl.DefaultExecProcessor.handle(DefaultExecProcessor.java:48)
     at uk.ltd.getahead.dwr.impl.DefaultProcessor.handle(DefaultProcessor.java:81)
     at uk.ltd.getahead.dwr.AbstractDWRServlet.doPost(AbstractDWRServlet.java:162)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:936)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:801)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:224)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:26 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/userimportexport
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/ImportExportPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at org.jivesoftware.openfire.container.PluginManager.installPlugin(PluginManager.java:195)
     at org.jivesoftware.openfire.update.UpdateManager.downloadPlugin(UpdateManager.java:284)
     at org.jivesoftware.openfire.update.PluginDownloadManager.installPlugin(PluginDownloadManager.java:68)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:622)
     at uk.ltd.getahead.dwr.impl.ExecuteQuery.execute(ExecuteQuery.java:248)
     at uk.ltd.getahead.dwr.impl.DefaultExecProcessor.handle(DefaultExecProcessor.java:48)
     at uk.ltd.getahead.dwr.impl.DefaultProcessor.handle(DefaultProcessor.java:81)
     at uk.ltd.getahead.dwr.AbstractDWRServlet.doPost(AbstractDWRServlet.java:162)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:936)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:801)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:224)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:36 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:36 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/userimportexport
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/ImportExportPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:50 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:303)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:50 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:303)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:51 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:519)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:51 org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject cannot be cast to org.bouncycastle.asn1.ASN1Sequence
     at org.jivesoftware.util.CertificateManager.getSubjectAlternativeNames(CertificateManager.java:260)
     at org.jivesoftware.util.CertificateManager.getPeerIdentities(CertificateManager.java:223)
     at org.jivesoftware.util.CertificateManager.isCertificate(CertificateManager.java:371)
     at org.jivesoftware.util.CertificateManager.isRSACertificate(CertificateManager.java:322)
     at org.jivesoftware.openfire.admin.index_jsp._jspService(index_jsp.java:519)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1359)
     at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
     at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:50)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)
     at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
     at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
     at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
     at org.eclipse.jetty.server.Server.handle(Server.java:349)
     at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
     at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
     at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
     at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
     at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
     at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:56 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/registration
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/RegistrationPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)
2014.11.17 12:49:56 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /usr/share/openfire/plugins/userimportexport
java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/ImportExportPlugin : Unsupported major.minor version 51.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
     at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:420)
     at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java:80)
     at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:1074)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
     at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at java.lang.Thread.run(Thread.java:701)

Its seems to be that you use java 6 for openfire, but the Plugins are compiled with Java 7.

Yes, that’s it! Where did you see that?

Now everything works fine again! Thank you!

This Exception shows the error:

java.lang.UnsupportedClassVersionError: org/jivesoftware/openfire/plugin/ImportExportPlugin : Unsupported major.minor version 51.0

These are the Java version numbers and binary version numbers

J2SE 8 = 52, J2SE 7 = 51, J2SE 6.0 = 50, J2SE 5.0 = 49, JDK 1.4 = 48, JDK 1.3 = 47, JDK 1.2 = 46, JDK 1.1 = 45