https://bz.apache.org/bugzilla/show_bug.cgi?id=66676
Bug ID: 66676
Summary: WebSocket session complains about closed state when
calling close()
Product: Tomcat 10
Version: 10.1.8
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P2
Component: WebSocket
Assignee: dev@tomcat.apache.org
Reporter: magicb...@gmx.de
Target Milestone: ------
Hey,
I've found a bug with the following stacktrace:
java.lang.IllegalStateException: The WebSocket session [210b] 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:974)
at
org.apache.tomcat.websocket.WsSession.getUserPrincipal(WsSession.java:862)
at
org.apache.tomcat.websocket.server.WsServerContainer.unregisterSession(WsServerContainer.java:350)
at
org.apache.tomcat.websocket.WsSession.sendCloseMessage(WsSession.java:730)
at org.apache.tomcat.websocket.WsSession.doClose(WsSession.java:597)
at org.apache.tomcat.websocket.WsSession.doClose(WsSession.java:554)
at org.apache.tomcat.websocket.WsSession.close(WsSession.java:542)
>From the message of the exception it is mentioned that it is valid to call
close anytime, so I would not expect this exception.
What happens here is, that sending the close message fails, so the WebSocket
session gets closed in the "sendCloseMessage" method. Later on in the same
method the "unregisterSession" is called which is trying to get the
userPrincipal, but as the session was just closed this fails and you end up
with this exception.
I would either expect that either the "apart from close()" is removed from the
message, or the call fails with the original IOException, but not that the
"unregistering" fails and by that overruling the IOException from sending the
closure and showing a rather confusing message.
Let me know if you've any questions.
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