RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 638592 - make corosync more resilient to delayed multicast packets
Summary: make corosync more resilient to delayed multicast packets
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: corosync
Version: 6.0
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Steven Dake
QA Contact: Cluster QE
URL:
Whiteboard:
Depends On: 619496
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-09-29 12:54 UTC by RHEL Program Management
Modified: 2016-04-26 14:51 UTC (History)
6 users (show)

Fixed In Version: corosync-1.2.3-21.el6_0.1
Doc Type: Bug Fix
Doc Text:
Compared to a unicast token, certain network switches add an extra delay to the transmission of a multicast packet. Consequent to this, multicast messages may have been retransmitted, even though the message was not lost and the retransmission was therefore not necessary. This update introduces the "miss_count_const" constant that allows a user to specify the maximum number of times a message is checked for retransmission before the retransmission is performed.
Clone Of:
Environment:
Last Closed: 2011-03-17 12:28:58 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description RHEL Program Management 2010-09-29 12:54:58 UTC 
This bug has been copied from bug #619496 and has been proposed
to be backported to 6.0 z-stream (EUS).
Comment 4 Douglas Silas 2011-01-11 23:11:58 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:
OpenAIS has been enabled to work in network environments wherein multicast messages are slightly delayed when compared to token messages.
Comment 5 Jaromir Hradilek 2011-01-12 15:33:13 UTC 
    Technical note updated. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    Diffed Contents:
@@ -1 +1 @@
-OpenAIS has been enabled to work in network environments wherein multicast messages are slightly delayed when compared to token messages.+Compared to a unicast token, certain network switches add an extra delay to the transmission of a multicast packet. Consequent to this, multicast messages may have been retransmitted, even though the message was not lost and the retransmission was therefore not necessary. This update introduces the "miss_count_const" constant that allows a user to specify the maximum number of times a message is checked for retransmission before the retransmission is performed.
Comment 7 errata-xmlrpc 2011-03-17 12:28:58 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/RHBA-2011-0360.html
Note You need to log in before you can comment on or make changes to this bug.