Herror de conexion S2S en openfire 4.4.4

Tengo un servidore openfire v4.4.4 instalado sobre ubuntu server 18.04 e intento establecer coneccion s2s con otros servidores openfire fuera de mi dominio y devuelve error al testear conexion s2s, el error es el siguiente:
Sending server to server ping request to jabber.xxx.xxx.cu
Created cache [org.jivesoftware.util.cache.DefaultLocalCacheStrategy] for Remote Server Configurations
StartTLS negotiation failed. Closing connection (without sending any data such as or ).
javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1521) ~[?:1.8.0_222]
at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:528) ~[?:1.8.0_222]
at sun.security.ssl.SSLEngineImpl.writeAppRecord(SSLEngineImpl.java:1197) ~[?:1.8.0_222]
at sun.security.ssl.SSLEngineImpl.wrap(SSLEngineImpl.java:1165) ~[?:1.8.0_222]
at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:469) ~[?:1.8.0_222]
at org.jivesoftware.openfire.net.TLSStreamHandler.doHandshake(TLSStreamHandler.java:296) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.net.TLSStreamHandler.start(TLSStreamHandler.java:181) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.net.SocketConnection.startTLS(SocketConnection.java:189) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.session.LocalOutgoingServerSession.secureAndAuthenticate(LocalOutgoingServerSession.java:459) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.session.LocalOutgoingServerSession.createOutgoingSession(LocalOutgoingServerSession.java:348) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.session.LocalOutgoingServerSession.authenticateDomain(LocalOutgoingServerSession.java:209) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.sendPacket(OutgoingSessionPromise.java:261) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.run(OutgoingSessionPromise.java:239) [xmppserver-4.4.4.jar:4.4.4]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) ~[?:1.8.0_222]
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1709) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:318) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310) ~[?:1.8.0_222]
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639) ~[?:1.8.0_222]
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$1.run(Handshaker.java:970) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$1.run(Handshaker.java:967) ~[?:1.8.0_222]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459) ~[?:1.8.0_222]
at org.jivesoftware.openfire.net.TLSStreamHandler.doTasks(TLSStreamHandler.java:347) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.net.TLSStreamHandler.doHandshake(TLSStreamHandler.java:257) ~[xmppserver-4.4.4.jar:4.4.4]
… 10 more
Caused by: java.security.cert.CertificateException: java.security.cert.CertPathBuilderException: No issuer certificate for certificate in certification path found.
at org.jivesoftware.openfire.keystore.OpenfireX509TrustManager.checkServerTrusted(OpenfireX509TrustManager.java:108) ~[xmppserver-4.4.4.jar:4.4.4]
at sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:1113) ~[?:1.8.0_222]
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1626) ~[?:1.8.0_222]
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$1.run(Handshaker.java:970) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$1.run(Handshaker.java:967) ~[?:1.8.0_222]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459) ~[?:1.8.0_222]
at org.jivesoftware.openfire.net.TLSStreamHandler.doTasks(TLSStreamHandler.java:347) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.net.TLSStreamHandler.doHandshake(TLSStreamHandler.java:257) ~[xmppserver-4.4.4.jar:4.4.4]
… 10 more
Caused by: java.security.cert.CertPathBuilderException: No issuer certificate for certificate in certification path found.
at org.bouncycastle.jce.provider.PKIXCertPathBuilderSpi.engineBuild(Unknown Source) ~[bcprov-jdk15on-1.63.jar:1.63.0]
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) ~[?:1.8.0_222]
at org.jivesoftware.openfire.keystore.OpenfireX509TrustManager.checkChainTrusted(OpenfireX509TrustManager.java:261) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.keystore.OpenfireX509TrustManager.checkServerTrusted(OpenfireX509TrustManager.java:104) ~[xmppserver-4.4.4.jar:4.4.4]
at sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:1113) ~[?:1.8.0_222]
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1626) ~[?:1.8.0_222]
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$1.run(Handshaker.java:970) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$1.run(Handshaker.java:967) ~[?:1.8.0_222]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_222]
at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459) ~[?:1.8.0_222]
at org.jivesoftware.openfire.net.TLSStreamHandler.doTasks(TLSStreamHandler.java:347) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.net.TLSStreamHandler.doHandshake(TLSStreamHandler.java:257) ~[xmppserver-4.4.4.jar:4.4.4]
… 10 more
Created cache [org.jivesoftware.util.cache.DefaultLocalCacheStrategy] for Secret Keys Cache
An exception occurred while loading plugin ‘emaillistener’:
java.lang.ClassNotFoundException: org.jivesoftware.openfire.plugin.EmailListenerPlugin
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_222]
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:585) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:374) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:362) [xmppserver-4.4.4.jar:4.4.4]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
An exception occurred while loading plugin ‘emaillistener’:
java.lang.ClassNotFoundException: org.jivesoftware.openfire.plugin.EmailListenerPlugin
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_222]
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:585) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:374) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:362) [xmppserver-4.4.4.jar:4.4.4]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
An exception occurred while loading plugin ‘emaillistener’:
java.lang.ClassNotFoundException: org.jivesoftware.openfire.plugin.EmailListenerPlugin
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_222]
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:585) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:374) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:362) [xmppserver-4.4.4.jar:4.4.4]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
An exception occurred while loading plugin ‘emaillistener’:
java.lang.ClassNotFoundException: org.jivesoftware.openfire.plugin.EmailListenerPlugin
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_222]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_222]
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:585) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:374) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.container.PluginMonitor$MonitorTask$4.call(PluginMonitor.java:362) [xmppserver-4.4.4.jar:4.4.4]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
Unable to create a new outgoing session
Unable to create a new session: Dialback (as a fallback) failed.
Unable to authenticate: Fail to create new session.
Successful server to server response received.
Primary packet routing failed
org.jivesoftware.openfire.PacketException: Cannot route packet of type IQ or Presence to bare JID:
at org.jivesoftware.openfire.spi.RoutingTableImpl.routeToLocalDomain(RoutingTableImpl.java:306) ~[xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.spi.RoutingTableImpl.routePacket(RoutingTableImpl.java:239) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.returnErrorToSender(OutgoingSessionPromise.java:343) [xmppserver-4.4.4.jar:4.4.4]
at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.run(OutgoingSessionPromise.java:242) [xmppserver-4.4.4.jar:4.4.4]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
Failed to establish server to server session.