[jira] Reopened: (ORCHESTRA-32) Hot-restart of Tomcat causes NullPointerException while deserializing saved http-session

["Simon Kitching (JIRA)" <de...@myfaces.apache.org>]

     [ https://issues.apache.org/jira/browse/ORCHESTRA-32?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Simon Kitching reopened ORCHESTRA-32:
-------------------------------------


Thanks for reporting this Mark. It's definitely a bad idea for a readResolve method to use the FrameworkAdapter because it may not exist at that time.

> Hot-restart of Tomcat causes NullPointerException while deserializing saved http-session
> ----------------------------------------------------------------------------------------
>
>                 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
>             Fix For: 1.4
>
>
> 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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