[IMAP-133] JPAStreamingMessage vs JPAMessage

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.1
• Component/s: JPA Mailbox
• Assignee: Norman Maurer
• Reporter: Tim-Christian Mundt
• Created: 23/Apr/10 14:06
• Updated: 23/Apr/10 15:23
• Resolved: 23/Apr/10 15:23

Description

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).