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From Norman Maurer <nor...@apache.org>
Subject Re: [jira] Created: (IMAP-133) JPAStreamingMessage vs JPAMessage
Date Fri, 23 Apr 2010 14:33:01 GMT
As a quick workaround , you should just remove the *Streaming* stuff
from the persistence.xml file. It seems like the classloader gets
confused otherwise sometimes...

Thx for Reporting,
Norman

2010/4/23, Tim-Christian Mundt (JIRA) <server-dev@james.apache.org>:
> JPAStreamingMessage vs JPAMessage
> ---------------------------------
>
>                  Key: IMAP-133
>                  URL: https://issues.apache.org/jira/browse/IMAP-133
>              Project: JAMES Imap
>           Issue Type: Bug
>           Components: JPA Mailbox
>             Reporter: Tim-Christian Mundt
>             Priority: Blocker
>
>
> With newest James I quite often (as always not always) get this error during
> copy operations which causes them to fail:
>
> Exception in thread "pool-8-thread-1" java.lang.ClassCastException:
> org.apache.james.imap.jpa.mail.model.openjpa.JPAStreamingMessage cannot
> be cast to org.apache.james.imap.jpa.mail.model.JPAMessage
>         at
> org.apache.james.imap.jpa.mail.model.JPAMailboxMembership.<init>(JPAMailboxMembership.java:64)
>         at
> org.apache.james.imap.jpa.JPAMailbox.copyMessage(JPAMailbox.java:99)
>         at
> org.apache.james.imap.jpa.openjpa.OpenJPAMailbox.copyMessage(OpenJPAMailbox.java:83)
>         at
> org.apache.james.imap.store.StoreMailbox$5.run(StoreMailbox.java:611)
>         at
> org.apache.james.imap.store.transaction.AbstractTransactionalMapper.execute(AbstractTransactionalMapper.java:38)
>         at
> org.apache.james.imap.store.StoreMailbox.copy(StoreMailbox.java:603)
>         at
> org.apache.james.imap.store.StoreMailbox.copyTo(StoreMailbox.java:637)
>         at
> org.apache.james.imap.store.StoreMailboxManager.copyMessages(StoreMailboxManager.java:296)
>         at
> org.apache.james.imap.processor.CopyProcessor.doProcess(CopyProcessor.java:82)
>         at
> org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:125)
>         at
> org.apache.james.imap.processor.AbstractMailboxProcessor.process(AbstractMailboxProcessor.java:80)
>         at
> org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:73)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:44)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:46)
>         at
> org.apache.james.imap.main.AbstractImapRequestHandler.doProcessRequest(AbstractImapRequestHandler.java:65)
>         at
> org.apache.james.imap.main.ImapRequestStreamHandler.handleRequest(ImapRequestStreamHandler.java:82)
>         at
> org.apache.james.imapserver.netty.ImapStreamChannelUpstreamHandler.processStreamIo(ImapStreamChannelUpstreamHandler.java:64)
>         at
> org.jboss.netty.handler.stream.StreamHandler$1.run(StreamHandler.java:127)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
> Source)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
> Source)
>         at java.lang.Thread.run(Unknown Source)
>
> streaming is set to false. I found the place where the JPAStreamingMessage
> is created:
>
> 633 final MessageMapper<Id> mapper = createMessageMapper(session);
> 634
> 635 final List<MailboxMembership<Id>> originalRows =
> mapper.findInMailbox(set);
>
> in org.apache.james.imap.store.StoreMailbox. Those "originalRows" contain
> the JPAStreamingMessage(s). The question here is: How does the mapper know,
> which kind of Message to create - JPAStreamingMessage or JPAMessage? By the
> way, the former is defined twice in persistence.xml. First I thought, this
> might be the cause for the error, but really sometimes it gets the one type
> and after restarting James it maybe gets the other (but always the same type
> during one run).
>
> --
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