Hello fellow cluster guys,
I just upgraded my CentOS cluster to 6.9 and after a node reboot I discovered that the clvm functionality was broken. Long story made short, I tracked it back to clvmd process being hung with one CPU stuck. The quick and dirty solution was to rollback kernel to version 2.6.32-642.15.1.el6.x86_64, and the problem did not happen anymore. Anyway after opening a bugzilla, RH guys pointed me to the real issue, that is a libqb thread issue. The bug (containing the temporary fix, waiting for the next packages upgrade) is tracked here: https://bugzilla.redhat.com/show_bug.cgi?id=1440160 Hope it helps others. Ciao, A.
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