[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Replicate Deliveries on ServerConsumerImpl

[clebert.suconic@jboss.com]

I wrote a Failover test that is sending 100 messages to a live node and consuming all on the live node. (i.e. I have the backup configured, but I don't call Failover).

As I ACK the messages, I'm getting several errors on not finding the MessageId on ServerConsumerImpl::deliveringRefs.


After some investigation I found out that deliverReplicated is calling doHandle, and doHandle is checking for credits, even though this is documented:

      // We call doHandle rather than handle, since we don't want to check available credits
  |       // This is because delivery and receive credits can be processed in different order on live
  |       // and backup, and otherwise we could have a situation where the delivery is replicated
  |       // but the credits haven't arrived yet, so the delivery gets rejected on backup
  |       HandleStatus handled = doHandle(ref);
  | 



   private HandleStatus doHandle(final MessageReference ref) throws Exception
  |    {
  |       if (availableCredits != null && availableCredits.get() <= 0)
  |       {
  |          return HandleStatus.BUSY;
  |       }
  | 
  |       lock.lock();
  | 
  |       try
  |       {
  |          // If there is a pendingLargeMessage we can't take another message
  |          // This has to be checked inside the lock as the set to null is done inside the lock
  |          if (largeMessageSender != null)
  |          {
  |             return HandleStatus.BUSY;
  |          }
  | 


I'm getting several exceptions like:

     if (handled != HandleStatus.HANDLED)
  |       {
  |          throw new IllegalStateException("Reference was not handled " + ref + " " + handled);
  |       }
  | 


and several others on not finding the MessageId.




Why deliverReplicated needs to actually call handle? Shouldn't instead just adding it to the list and eventually performing preCommit?



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