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Cause:
In very rare conditions, running corosync-cfgtool -H.
Consequence:
corosync-cfgtool -H returns error 6 (CS_ERR_TRY_AGAIN). When command is called again, error (CS_ERR_EXISTS) is always returned.
Fix:
corosync-cfgtool is changed to automatically retry (so no longer error 6 - CS_ERR_TRY_AGAIN). cfg library now allows call shutdown function multiple times.
Result:
corosync-cfgtool -H works all time.
Created attachment 713828[details]
Proposed patch - part 1 - When send_shutdown fails, clear shutdown_con
Description of problem:
When send_shutdown fails (usually CS_ERR_TRY_AGAIN), shutdown_con is still set, and next call will check that shutdown_con is set and refuses to shutdown. Also in corosync-cfgtool, shutdown should be repeated if err = CS_ERR_TRY_AGAIN.
Version-Release number of selected component (if applicable):
Any
How reproducible:
0.000001% with blackbox testing
Steps to Reproduce:
1. https://github.com/jfriesse/csts/blob/master/tests/start-cfgstop-one-by-one-with-load.sh
2. From time to time, result is (Can't shutdown, error 6) (error 6 is CS_ERR_TRY_AGAIN). Recalling of function (with patch 2) returns CS_ERR_EXISTS.
Actual results:
corosync-cfgtool -H doesn't work with high loaded cluster
Expected results:
corosync-cfgtool -H Always works
Additional info:
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-2013-1531.html