https://issues.apache.org/bugzilla/show_bug.cgi?id=51910
Bug #: 51910
Summary: NPE in comet processing when shutting down Tomcat
Product: Tomcat 7
Version: trunk
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
I've hit it when testing 7.0.22 RC.
1. Configure Tomcat with NIO connector
2. Start Tomcat and open Comet chat example
http://localhost:8080/examples/jsp/chat/index.jsp
3. Type some Nickname and press button to start chat
The chat log will be in the second frame at the lower half of the page.
4. While chat log is active (Browser shows page as being loaded),
shut down Tomcat.
5. Observe NPE in the logs:
28.09.2011 15:55:32 org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["http-nio-8080"]
28.09.2011 15:55:33 org.apache.catalina.connector.CoyoteAdapter event
SEVERE: null
java.lang.NullPointerException
at
org.apache.catalina.core.StandardWrapperValve.event(StandardWrapperValve.java:354)
at
org.apache.catalina.core.StandardContextValve.event(StandardContextValve.java:192)
at org.apache.catalina.valves.ValveBase.event(ValveBase.java:226)
at
org.apache.catalina.core.StandardHostValve.event(StandardHostValve.java:245)
at org.apache.catalina.valves.ValveBase.event(ValveBase.java:226)
at org.apache.catalina.valves.ValveBase.event(ValveBase.java:226)
at
org.apache.catalina.core.StandardEngineValve.event(StandardEngineValve.java:138)
at
org.apache.catalina.connector.CoyoteAdapter.event(CoyoteAdapter.java:211)
at
org.apache.coyote.http11.Http11NioProcessor.event(Http11NioProcessor.java:131)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.>
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1554)
at
org.apache.tomcat.util.net.NioEndpoint.processSocket(NioEndpoint.java:717)
at
org.apache.tomcat.util.net.NioEndpoint$Poller.cancelledKey(NioEndpoint.java:1026)
at
org.apache.tomcat.util.net.NioEndpoint$Poller.processKey(NioEndpoint.java:1169)
at
org.apache.tomcat.util.net.NioEndpoint$Poller.timeout(NioEndpoint.java:1352)
at
org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:1085)
at java.lang.Thread.run(Thread.java:662)
28.09.2011 15:55:33 org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["ajp-bio-8009"]
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