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: [email protected]
Reporter: [email protected]
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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