On 08/02/2011 04:47 PM, Stanley, Ephrim wrote: > Hi, > > I’m evaluating the Qpid messaging broker which uses Corosync for > clustering. As part of my cluster break tests, I ran into a problem > where Corosync dies without producing any core files or error messages. > > Is this expected ? Also, what are some best practices for testing packet > loss with Corosync ? > > Steps to reproduce : > > 1. Compile Corosync 1.2.3 after enabling the #defines for packet loss > (in totemsrp.c line 129). I did not change the drop percentages.. > left them as is > > > #define TEST_DROP_ORF_TOKEN_PERCENTAGE 30 > #define TEST_DROP_COMMIT_TOKEN_PERCENTAGE 30 > #define TEST_DROP_MCAST_PERCENTAGE 50 > #define TEST_RECOVERY_MSG_COUNT 300 > > > 2. Start a qpid cluster with three nodes NODE1, NODE2, NODE3 > 3. Nodes NODE2 and NODE3 are run with the Corosync that does not drop > packets > 4. Start the qpid process on nodes NODE2 and NODE3 > 5. After both proceses are up, corosync-cpgtool reports the cluster > membership correctly > 6. On NODE1, start Corosync (that drops packets) > 7. Corosync starts and packet drops can be observed in the Corosync log > (I added some debug log statements) > 8. Start a qpid process on NODE1 > 9. Now, Corosync crashes on NODE1. No core files are produced. > > > I have attached the output of corosync-fplay on NODE1 and a diff of the > changes I made to totemsrp.c. > > > Thanks, Ephrim. > > >
Ephrim Could you be more specific about which version of Red Hat's build of corosync you are using? Redundant ring is not supported in 1.2.3 by upstream nor Red Hat. Looking at existing bugs that have not hit z streams yet, may be this issue: https://bugzilla.redhat.com/show_bug.cgi?id=722522 to get a core file, set ulimit -c unlimited before running corosync. A core file would verify if this is a known fixed problem or a new issue. Thanks -steve > > > _______________________________________________ > Openais mailing list > [email protected] > https://lists.linux-foundation.org/mailman/listinfo/openais _______________________________________________ Openais mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/openais
