[jboss-jira] [JBoss JIRA] (JBWEB-287) Websocket application working with multiple clients (e.g. chat style applications) fails due NullPointerException

Radim Hatlapatka (JIRA) issues at jboss.org
Mon Jan 6 07:03:33 EST 2014 

Radim Hatlapatka created JBWEB-287:
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             Summary: Websocket application working with multiple clients (e.g. chat style applications) fails due NullPointerException
                 Key: JBWEB-287
                 URL: https://issues.jboss.org/browse/JBWEB-287
             Project: JBoss Web
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Core
            Reporter: Radim Hatlapatka
            Assignee: Remy Maucherat
            Priority: Critical


When trying to run websocket application with jbossweb 7.4.0.Beta1 (with EAP 6.2.0), websocket connection is successfully established but upon a message sent NullPointerException is thrown:

{noformat}
11:47:27,176 ERROR [org.apache.catalina.core.StandardWrapperValve] (http-localhost.localdomain/127.0.0.1:8080-25) JBWEB000374: IO listener processing for servlet default threw exception: java.lang.NullPointerException
	at org.apache.tomcat.websocket.server.WsRemoteEndpointImplServer.onWritePossible(WsRemoteEndpointImplServer.java:92) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler$WsWriteListener.onWritePossible(WsHttpUpgradeHandler.java:232) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardWrapperValve.async(StandardWrapperValve.java:603) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardWrapperValve.event(StandardWrapperValve.java:350) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardContextValve.event(StandardContextValve.java:171) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.valves.ValveBase.event(ValveBase.java:185) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardHostValve.event(StandardHostValve.java:247) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.valves.ValveBase.event(ValveBase.java:185) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardEngineValve.event(StandardEngineValve.java:121) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.connector.CoyoteAdapter.event(CoyoteAdapter.java:228) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.coyote.http11.Http11NioProcessor.event(Http11NioProcessor.java:230) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.event(Http11NioProtocol.java:818) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.tomcat.util.net.NioEndpoint$ChannelProcessor.run(NioEndpoint.java:917) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
	at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]

11:47:27,177 ERROR [org.apache.tomcat.websocket.pojo.PojoEndpointBase] (http-localhost.localdomain/127.0.0.1:8080-25) JBWEB008809: No error handling configured for [com.byteslounge.websockets.WebSocketTest] and the following error occurred: java.io.EOFException
	at org.apache.catalina.core.StandardWrapperValve.async(StandardWrapperValve.java:553) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardWrapperValve.event(StandardWrapperValve.java:350) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardContextValve.event(StandardContextValve.java:171) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.valves.ValveBase.event(ValveBase.java:185) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardHostValve.event(StandardHostValve.java:247) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.valves.ValveBase.event(ValveBase.java:185) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardEngineValve.event(StandardEngineValve.java:121) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.connector.CoyoteAdapter.event(CoyoteAdapter.java:237) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.coyote.http11.Http11NioProcessor.event(Http11NioProcessor.java:230) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.event(Http11NioProtocol.java:818) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.tomcat.util.net.NioEndpoint$ChannelProcessor.run(NioEndpoint.java:917) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
	at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]

11:47:27,178 ERROR [org.apache.tomcat.websocket.pojo.PojoEndpointBase] (http-localhost.localdomain/127.0.0.1:8080-25) JBWEB008809: No error handling configured for [com.byteslounge.websockets.WebSocketTest] and the following error occurred: java.io.EOFException
	at org.apache.catalina.core.StandardWrapperValve.async(StandardWrapperValve.java:553) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardWrapperValve.event(StandardWrapperValve.java:350) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardContextValve.event(StandardContextValve.java:171) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.valves.ValveBase.event(ValveBase.java:185) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardHostValve.event(StandardHostValve.java:247) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.valves.ValveBase.event(ValveBase.java:185) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.core.StandardEngineValve.event(StandardEngineValve.java:121) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.catalina.connector.CoyoteAdapter.event(CoyoteAdapter.java:237) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.coyote.http11.Http11NioProcessor.event(Http11NioProcessor.java:230) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.event(Http11NioProtocol.java:818) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at org.apache.tomcat.util.net.NioEndpoint$ChannelProcessor.run(NioEndpoint.java:917) [jbossweb-7.4.0.Beta1.jar:7.4.0.Beta1]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
	at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]
{noformat}

The same application correctly works with Tomcat 7

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