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Posted to dev@tomcat.apache.org by bu...@apache.org on 2015/04/02 23:51:07 UTC
[Bug 57788] New: NPE on session.addMessageHandler
https://bz.apache.org/bugzilla/show_bug.cgi?id=57788
Bug ID: 57788
Summary: NPE on session.addMessageHandler
Product: Tomcat 8
Version: 8.0.21
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: WebSocket
Assignee: dev@tomcat.apache.org
Reporter: marco@lordzodiac.de
The NPE is throwed when then MessageHandler has no Generic Class.
java.lang.NullPointerException
at org.apache.tomcat.websocket.Util.getGenericType(Util.java:192)
at org.apache.tomcat.websocket.Util.getGenericType(Util.java:212)
at org.apache.tomcat.websocket.Util.getGenericType(Util.java:212)
at org.apache.tomcat.websocket.Util.getGenericType(Util.java:212)
at org.apache.tomcat.websocket.Util.getMessageType(Util.java:171)
at
org.apache.tomcat.websocket.WsSession.addMessageHandler(WsSession.java:198)
Please check on the Util class line 210. The call clazz.getSuperclass() returns
null if clazz is a Object class (see JDK Javadoc).
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[Bug 57788] NPE on session.addMessageHandler
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=57788
Konstantin Kolinko <kn...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
OS| |All
--- Comment #1 from Konstantin Kolinko <kn...@gmail.com> ---
What are you trying to do here and what do you expect? Is it a real use case?
(Source code =?)
My expectations are that such call is expected to fail.
For reference, WsSession.addMessageHandler(WsSession.java:198) method called
here is
[[[
@Override
public void addMessageHandler(MessageHandler listener) {
]]]
declared in javax.websocket.Session.
Use of that method is discouraged in favor of WebSocket 1.1 methods
Session.addMessageHandler(Class<T> clazz, MessageHandler.Partial<T> handler)
Session.addMessageHandler(Class<T> clazz, MessageHandler.Whole<T> handler)
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[Bug 57788] NPE on session.addMessageHandler
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=57788
Remy Maucherat <re...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #2 from Remy Maucherat <re...@apache.org> ---
r1672628, will be included in 8.0.22. Of course, it will only display a
different error. Source for better test ?
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[Bug 57788] NPE on session.addMessageHandler
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=57788
--- Comment #3 from Remy Maucherat <re...@apache.org> ---
r1673169 for 7.0.62.
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