Bug 743812

Summary: cpg and cfg: Handle errors from totem_mcast
Product: Red Hat Enterprise Linux 6 Reporter: Jan Friesse <jfriesse>
Component: corosyncAssignee: Jan Friesse <jfriesse>
Status: CLOSED ERRATA QA Contact: Cluster QE <mspqa-list>
Severity: medium Docs Contact:
Priority: medium    
Version: 6.3CC: cluster-maint, jkortus, sdake
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: corosync-1.4.1-5.el6 Doc Type: Bug Fix
Doc Text:
Cause Extremely overloaded corosync (pload). Consequence IPC messages can be lost without giving information to application nor user. Fix Internal calls to mcast is properly checked and error code is returned. Result Application using IPC can now properly handle inability to send IPC message in given moment and can try send message later.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2012-06-20 12:22:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 756082    
Attachments:
Description Flags
Proposed patch for cpg
none
Proposed patch for cfg none

Description Jan Friesse 2011-10-06 07:29:06 UTC 
Created attachment 526637 [details]
Proposed patch for cpg

Description of problem:
totem_mcast function can return -1 if corosync is overloaded. Sadly in
many calls of this functions was error code ether not handled at all, or
handled by assert.

Commit changes behaviour to ether return CS_ERR_TRY_AGAIN or put error
code to later layers to handle it.

Version-Release number of selected component (if applicable):
1.4.1

How reproducible:
https://bugzilla.redhat.com/show_bug.cgi?id=664969

Unit test:
https://bugzilla.redhat.com/show_bug.cgi?id=664969
Comment 1 Jan Friesse 2011-10-06 07:29:42 UTC 
Created attachment 526638 [details]
Proposed patch for cfg
Comment 4 Jan Friesse 2012-03-07 07:24:29 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Cause
Extremely overloaded corosync (pload).

Consequence
IPC messages can be lost without giving information to application nor user.

Fix
Internal calls to mcast is properly checked and error code is returned.

Result
Application using IPC can now properly handle inability to send IPC message in given moment and can try send message later.
Comment 10 errata-xmlrpc 2012-06-20 12:22:43 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.

http://rhn.redhat.com/errata/RHBA-2012-0777.html