Bug 985869 - Do not make durable subscriptions auto-delete by default
Summary: Do not make durable subscriptions auto-delete by default
Alias: None
Product: Red Hat Enterprise MRG
Classification: Red Hat
Component: qpid-cpp
Version: Development
Hardware: Unspecified
OS: Unspecified
Target Milestone: 3.1
: ---
Assignee: Gordon Sim
QA Contact: Petr Matousek
Depends On:
TreeView+ depends on / blocked
Reported: 2013-07-18 12:02 UTC by Petr Matousek
Modified: 2015-04-14 13:46 UTC (History)
4 users (show)

Fixed In Version: qpid-cpp-0.30-2
Doc Type: Enhancement
Doc Text:
Clone Of:
Last Closed: 2015-04-14 13:46:47 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Apache JIRA QPID-5002 None None None Never
Red Hat Bugzilla 985870 None None None Never
Red Hat Product Errata RHEA-2015:0805 normal SHIPPED_LIVE Red Hat Enterprise MRG Messaging 3.1 Release 2015-04-14 17:45:54 UTC

Internal Links: 985870

Description Petr Matousek 2013-07-18 12:02:06 UTC
Description of problem:

Subscription queues defined using amqp1.0 are *not* auto-delete by default. 
Subscription queues defined using amqp0-10 are auto-delete by default.
This puts amqp0-10 and amqp1.0 out of sync.

After discussion with gsim we agreed that defining durable subscription queues to be auto-delete by default without a delayed time for the auto-delete, would not make much sense.

ie. on broker restart, the broker terminates all the connections (and sessions), so in fact the durable queue is deleted on broker restart. 

note: By specifying that a subscription is durable, the client is taking on responsibility for deleting it to some extent.

The right solution might be to have a configurable time-delayed auto-delete on subscription queues by default. This will protect the broker from clients that go off and leave stale subscriptions after a crash, but it still retain the general ability to survive a crash and re-establish subscription without lost messages. I'm going to fill a RFE bug for this improvement.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. $cppapi/drain -f amq.direct &
2. qpid-config queues
   the just created subscription queue is auto-del

Actual results:
Subscription queue is auto-delete by default (amqp0-10)

Expected results:
Subscription queue is not auto-delete by default (amqp0-10)

Additional info:

Comment 1 Petr Matousek 2013-07-18 12:06:23 UTC
> ... I'm going to fill a RFE bug for this improvement.

please see bug 985870

Comment 2 Gordon Sim 2013-07-18 19:54:40 UTC
Fixed upstream: https://svn.apache.org/r1504621

Comment 4 Petr Matousek 2015-03-30 11:40:19 UTC
This improvement has been implemented. 
Verified on rhel6.6 (x86_64 and i386) and rhel7 (x86_64).

The timed auto-delete (default to 120s) is now added by default to the subscription queue when a durable subscription is requested. This works for both amqp0-10 and amqp1.0, but only if C++ client is used (Using other clients the auto-delete-timeout must be explicitly set for the link). please see bug 985870 for details.



Comment 7 errata-xmlrpc 2015-04-14 13:46:47 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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