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jirapos...@reviews.apache.org commented on QPID-3079: ----------------------------------------------------- bq. On 2011-06-09 20:51:15, Alan Conway wrote: bq. > /branches/qpid-3079/qpid/cpp/src/qpid/broker/SemanticState.cpp, line 799 bq. > <https://reviews.apache.org/r/860/diff/1/?file=20825#file20825line799> bq. > bq. > Do we need the uniqueness logic? How often are we likely to see duplicate queues in the list? Flushing is an idempotent operation, so flushing twice would be an error. would _not_ be an error I meant to say - Alan ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/860/#review795 ----------------------------------------------------------- On 2011-06-08 20:31:05, Kenneth Giusti wrote: bq. bq. ----------------------------------------------------------- bq. This is an automatically generated e-mail. To reply, visit: bq. https://reviews.apache.org/r/860/ bq. ----------------------------------------------------------- bq. bq. (Updated 2011-06-08 20:31:05) bq. bq. bq. Review request for qpid, Alan Conway, Gordon Sim, and Kim van der Riet. bq. bq. bq. Summary bq. ------- bq. bq. Modifies the broker's handling of Message.Accept to hold off the completion of the command until all messages related to the accept have completed dequeue. This particularly applies to persistent messages, as the store::dequeue() operation must complete before the message is considered fully dequeued. bq. bq. Note this bugfix requires some changes to the broker's store module interface: previously, the store only identified the message when a dequeue was completed. This is not enough information - the queue from which is was removed must also be identified (the message may be in the process of being dequeued on several queues at once). bq. bq. bq. This addresses bug qpid-3079. bq. https://issues.apache.org/jira/browse/qpid-3079 bq. bq. bq. Diffs bq. ----- bq. bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/AsyncCompletion.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/DeliveryRecord.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/DeliveryRecord.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/Message.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/Message.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/MessageStore.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/MessageStoreModule.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/MessageStoreModule.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/NullMessageStore.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/NullMessageStore.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/PersistableMessage.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/PersistableMessage.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/PersistableQueue.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/Queue.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/Queue.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/RecoverableQueue.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/RecoveryManagerImpl.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/SemanticState.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/SessionContext.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/SessionState.h 1124895 bq. /branches/qpid-3079/qpid/cpp/src/qpid/broker/SessionState.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/tests/AsyncCompletion.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/tests/QueueTest.cpp 1124895 bq. /branches/qpid-3079/qpid/cpp/src/tests/TestMessageStore.h 1124895 bq. bq. Diff: https://reviews.apache.org/r/860/diff bq. bq. bq. Testing bq. ------- bq. bq. broker unit tests, store unit tests (modified jboss store). Still needs to be vetted on non-linux, and have latest trunk merged in. bq. bq. bq. Thanks, bq. bq. Kenneth bq. bq. > message.accept command should be completed on a per-dequeue basis > ----------------------------------------------------------------- > > Key: QPID-3079 > URL: https://issues.apache.org/jira/browse/QPID-3079 > Project: Qpid > Issue Type: Bug > Components: C++ Broker > Affects Versions: 0.8, 0.9 > Reporter: Ken Giusti > Assignee: Ken Giusti > Fix For: 0.11 > > Attachments: proposal.txt > > > ** Overview > Asynchronous completion means that command execution is initiated in one > thread > (a client connection thread) and completed in a different thread. > When the async store is loaded, message.transfer commands are > completed by a store thread that does the async write. > ** Issues with asynchronous completion code as of revision r1029686 > *** Not really asynchronous > IncompleteMessageList::process blocks the connection thread till all > outstanding async commands (messages) for the session are complete. > With the new cluster, this could deadlock since it is blocking a Poller > thread. > *** Race condition for message.transfer > > Sketch of the current code: > // Called in connection thread > PersistableMessage::enqueueAsync { ++counter; } > // Called in store thread once message is written. > PersistableMessage::enqueueComplete { if (--counter == 0) notifyCompleted(); } > The intent is that notify be called once per message, after the > message has been written to each queue it was routed to. > However of a message is routed to N queues, it's possible for > notifyCompleted to be called up to N times. The store thread could > call notifyCompleted for the first queue before the connection thread > has called enqueueAsync for the second queue, and so on. > *** No asynchronous completion for message.accept > We do not currently delay completion of message.accept until the > message is deleted from the async store. This could cause duplicate > delivery if the broker crashes after completing the message but > before it is removed from store. > There is code in PersistableMessage to maintain a counter for dequeues > analogous to to the async enqueue code but this is incorrect. > Completion of transfer is triggered when all enqueues for a message are > complete. > Completion of accept is triggered for *each* dequeue from a queue > independently. > Furthermore a single accept can reference many messages, so it can't be > associated with a message. > ** New requirements > The new cluster design will need to participate in async completion, e.g. > an accept cannot be comlpeted until the message is > - removed from store (if present) AND > - replicated to the cluster (if present) as dequeued > The new cluster also needs to asynchronously complete binding commands > (declare, bind, delete) when they are replicated to the cluster. -- This message is automatically generated by JIRA. 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