Hot-restart of Tomcat causes NullPointerException while deserializing saved
http-session
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Key: ORCHESTRA-32
URL: https://issues.apache.org/jira/browse/ORCHESTRA-32
Project: MyFaces Orchestra
Issue Type: Bug
Components: Conversation
Affects Versions: 1.2
Reporter: Simon Kitching
Assignee: Simon Kitching
Tomcat displays this message on restart:
SCHWERWIEGEND: Exception loading sessions from persistent storage
java.lang.NullPointerException
at
java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:881)
at
org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1445)
The problem is that the orchestra ConversationManager class has a readResolve
method that returns null, intending that the object just gets created "on
demand" later. However Tomcat tries to put the deserialized object into its
session - and null objects are not permitted in an HttpSession.
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