Blocked or stalled lvm commands in a cluster running clvmd but new lvm commands complete successfully in RHEL 5

Solution Unverified - Updated -

Issue

  • Old lvs or other lvm commands are seen in ps and have been stuck for days, but new lvm commands complete without issue
  • We have been experiencing hangs on shutdown on RHEL 5.9 servers running Red Hat Cluster, and have narrowed the problem down to a hung lvs command spawned by the LVM monitor.
# ps aux|grep lvs
root      7801  0.0  0.0  20688  2016 ?        S<   Sep26   0:00 lvs -o attr --noheadings
root     10268  0.0  0.0  20696  2044 ?        S<   Sep25   0:00 lvs -o attr --noheadings
root     22167  0.0  0.0  20520  1868 ?        S<   Sep25   0:00 lvs -o attr --noheadings

Environment

  • Red Hat Enterprise Linux (RHEL) 5 with the Resilient Storage Add On
  • lvm2-cluster
    • locking_type = 3 in /etc/lvm/lvm.conf
    • One or more volume groups with the clustered attribute set

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