Spark-Clients going offline/online every minute

Spark Spark Support
1

Hello,

I have a problem with Spark 2.6.3 and Openfire 3.7.1.

The Spark-Clients who are connected to Openfire are allways going offline and after a reconnect they are comming online again. And this maybe every 2 minutes.

The debug-log of Openfire showes the following Exception when the client is going offline:

2012.11.27 14:23:56 org.jivesoftware.openfire.nio.ClientConnectionHandler - [/192.168.3.116:1437] Unexpected exception from SSLEngine.closeInbound().

javax.net.ssl.SSLException: Inbound closed before receiving peer’s close_notify: possible truncation attack?

at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:190)

at com.sun.net.ssl.internal.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1429)

at com.sun.net.ssl.internal.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1397)

at com.sun.net.ssl.internal.ssl.SSLEngineImpl.closeInbound(SSLEngineImpl.java:1336 )

at org.apache.mina.filter.support.SSLHandler.destroy(SSLHandler.java:167)

at org.apache.mina.filter.SSLFilter.sessionClosed(SSLFilter.java:367)

at org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionClosed(Abst ractIoFilterChain.java:269)

at org.apache.mina.common.support.AbstractIoFilterChain.access$800(AbstractIoFilte rChain.java:53)

at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.sessionClosed( AbstractIoFilterChain.java:633)

at org.apache.mina.common.support.AbstractIoFilterChain$HeadFilter.sessionClosed(A bstractIoFilterChain.java:484)

at org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionClosed(Abst ractIoFilterChain.java:269)

at org.apache.mina.common.support.AbstractIoFilterChain.fireSessionClosed(Abstract IoFilterChain.java:264)

at org.apache.mina.common.support.IoServiceListenerSupport.fireSessionDestroyed(Io ServiceListenerSupport.java:224)

at org.apache.mina.transport.socket.nio.SocketIoProcessor.doRemove(SocketIoProcess or.java:188)

at org.apache.mina.transport.socket.nio.SocketIoProcessor.access$600(SocketIoProce ssor.java:45)

at org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(SocketIoProce ssor.java:489)

at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java: 886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:662)

Is this the a possible reason why the Spark is going offline and what can i do against it? I don’t know anymore what i can try to keep the client permanent online. Could it be that it is an issue of the network connection?

I really appreciate any help.

Best regards

2

It says about SSL in the exception. Are you using SSL encryption for connections between SPark and Openfire? You can try disabling encryption in the Admin Console in Server Settings > Security Settings (making it Optional or Not available)

3

I am facing same problem, and its a requirment. I have 2-way SSL Authentication. i.e both server and client have certs.

4

From this link: https://issues.apache.org/jira/browse/DIRMINA-272

[DIRMINA-272] Unexpected exception from SSLEngine.closeInbound() - ASF JIRA

they saying, its not a big issue, we can ignore it.