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Bug 985869

Summary:	Do not make durable subscriptions auto-delete by default
Product:	Red Hat Enterprise MRG	Reporter:	Petr Matousek <pematous>
Component:	qpid-cpp	Assignee:	Gordon Sim <gsim>
Status:	CLOSED ERRATA	QA Contact:	Petr Matousek <pematous>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	Development	CC:	gsim, jross, mtoth, zkraus
Target Milestone:	3.1	Keywords:	Improvement
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	qpid-cpp-0.30-2	Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-04-14 13:46:47 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

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):
qpid-cpp-*-0.22-7

How reproducible:
100%

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.

Packages:
  qpid-cpp-0.30-7

-> VERIFIED

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.

https://rhn.redhat.com/errata/RHEA-2015-0805.html