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Posted to dev@qpid.apache.org by "Gordon Sim (JIRA)" <ji...@apache.org> on 2011/09/15 14:42:09 UTC
[jira] [Commented] (QPID-3487) Client should send completions when
closing a receiver
[ https://issues.apache.org/jira/browse/QPID-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13105297#comment-13105297 ]
Gordon Sim commented on QPID-3487:
----------------------------------
I believe the correct fix here is to ensure the broker cleans up delivery records for any ended transfers as and when the subscription is cancelled. There is no need to keep them around pending completion as credit tracking is no longer a concern. This also fixes the possibility at present of having delivery records get 'stuck' in the list, never completed as the consumer is cancelled.
> Client should send completions when closing a receiver
> ------------------------------------------------------
>
> Key: QPID-3487
> URL: https://issues.apache.org/jira/browse/QPID-3487
> Project: Qpid
> Issue Type: Bug
> Components: C++ Client
> Reporter: Andy Goldstein
> Fix For: 0.13
>
>
> When closing a receiver for a queue that is either delete:always or auto-delete:true, it is possible for the queue to remain visible in management (qmf) even though the client has already acknowledged, released, or rejected all messages.
> Steps to reproduce:
> 1) Create receiver e.g. my-queue; {create:always, delete:always, node: {x-declare: {auto-delete: true}}}
> 2) Set capacity to something e.g. 10
> 3) Send messages to my-queue
> 4) Call get() on the receiver for each message
> 5) Ack/release/reject each message
> 6) Close the receiver
> 7) IMPORTANT: keep the session alive
> Expected results: "qpid-stat -q" will not show my-queue in the list
> Actual results: "qpid-stat -q" shows my-queue in the list
> This happens because the broker has instances of DeliveryRecord in memory for each message that the receiver acquired, and each DeliveryRecord has a shared_ptr to the Queue. Because the receiver does not necessarily send completions for all the message.transfer commands, DeliveryRecords will still be around, which means the Queue will still be visible via management.
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