Bug 479330

Summary:	cluster crashes without mcast-max workaround
Product:	Red Hat Enterprise MRG	Reporter:	Alan Conway <aconway>
Component:	qpid-cpp	Assignee:	Alan Conway <aconway>
Status:	CLOSED ERRATA	QA Contact:	Frantisek Reznicek <freznice>
Severity:	high	Docs Contact:
Priority:	high
Version:	1.1	CC:	esammons
Target Milestone:	1.1.1
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-04-21 16:17:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Alan Conway 2009-01-08 21:24:55 UTC

Description of problem:

If --cluster-mcasts-max is set 0, the cluster crashes with corrupted frames.

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


How reproducible: easy


Steps to Reproduce:

[aconway@mrg10 tests]$ ../qpidd --cluster-read-max 0 --cluster-mcast-max 0 --load-module ../.libs/cluster.so&
[aconway@mrg10 tests]$   ./perftest --count 10000 --nsubs 4 --npubs 4

Actual results:

Cluster crashes with log similar to:
2009-jan-08 16:14:46 critical 20.0.10.9:27404(READY) error in cluster delivery: framing-error: Framing version unsupported (qpid/framing/AMQFrame.cpp:80)
2009-jan-08 16:14:46 notice 20.0.10.9:27404(LEFT) leaving cluster aconway

Expected results:

no error.

Additional info:

This is sometimes, but not always accompanied by an openais crash. 
The mcast-max and read-max limit the number of outstanding multicasts to openais, so this appears to be a flow control problem. Looks related to:

https://bugzilla.redhat.com/show_bug.cgi?id=477243
https://bugzilla.redhat.com/show_bug.cgi?id=471896

but there may be a qpidd bug lurking as well.

Comment 1 Alan Conway 2009-01-28 20:46:26 UTC

Resolved by openais patch ipc-14. The cluster-mcast-max option is removed.

Comment 3 Frantisek Reznicek 2009-02-23 15:51:26 UTC

Validated on RHEL 4.7 / 5.2 i386 / x86_64 that --cluster-mcast-max 0
 is not able to specify and therefore not able to get framing-error: Framing version unsupported issue.

Framing-error issues drastically reduced by new openais version 0.80.5-2. No such issue found after releasing that new openais version.

->VERIFIED

Comment 5 errata-xmlrpc 2009-04-21 16:17:41 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHEA-2009-0434.html