https://issues.apache.org/bugzilla/show_bug.cgi?id=54746
Bug ID: 54746
Summary: Cannot obtain information from Session in onClose
method
Product: Tomcat 8
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: major
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: nicho...@nicholaswilliams.net
Classification: Unclassified
See the exception below. I attempted to call getUserProperties() in a method
annotated @OnClose. Here is what the WebSocket spec says about this:
[quote]Once the session is closed, it is no longer valid for use by
applications. Calling any of its methods (with the exception of the close()
methods) once the session has been closed will result in an {@link
java.lang.IllegalStateException} being thrown. Developers should retrieve any
information from the session during the {@link Endpoint#onClose }
method.[/quote]
This clearly indicates that it is valid to "retrieve any information from the
session" DURING the call to onClose. Therefore, this exception should not have
been thrown.
SEVERE: Failed to call onError method of POJO end point for POJO of type
[com.wrox.chat.ChatEndpoint]
java.lang.reflect.InvocationTargetException
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:487)
at
org.apache.tomcat.websocket.pojo.PojoEndpointBase.onError(PojoEndpointBase.java:127)
at
org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.onError(WsHttpUpgradeHandler.java:139)
at
org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.access$300(WsHttpUpgradeHandler.java:42)
at
org.apache.tomcat.websocket.server.WsHttpUpgradeHandler$WsReadListener.onError(WsHttpUpgradeHandler.java:197)
at
org.apache.tomcat.websocket.server.WsHttpUpgradeHandler$WsReadListener.onDataAvailable(WsHttpUpgradeHandler.java:183)
at
org.apache.coyote.http11.upgrade.AbstractServletInputStream.onDataAvailable(AbstractServletInputStream.java:169)
at
org.apache.coyote.http11.upgrade.AbstractProcessor.upgradeDispatch(AbstractProcessor.java:94)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:618)
at
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1581)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1537)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalStateException: The WebSocket session has been
closed and no method (apart from close()) may be called on a closed session
at org.apache.tomcat.websocket.WsSession.checkState(WsSession.java:504)
at
org.apache.tomcat.websocket.WsSession.getUserProperties(WsSession.java:455)
at com.wrox.chat.ChatEndpoint.onError(ChatEndpoint.java:154)
... 18 more
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