Scripts or programs in /etc/watchdog.d to be checked by watchdog are listed in 'ps' output as "defunct" in RHEL 6

Solution In Progress - Updated -

Issue

  • I noticed several fence_scsi_check.pl zombie processes on each cluster node. These zombie processes appeared on the systems after half of the SAN paths were unavailable for the storage LUNs.
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      2380  0.0  0.0      0     0 ?        Z    Jan29   0:00 [fence_scsi_chec] <defunct>
root      2389  0.0  0.0      0     0 ?        Z    Jan29   0:00 [fence_scsi_chec] <defunct>
  • I have a script in /etc/watchdog.d that will reboot the host if there is an error. In ps output, I see several of these listed as <defunct> and don't seem to be going away.
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root     17468  0.0  0.0      0     0 ?        Z    12:16   0:00 [watchdog-test.b] <defunct>
root     17525  0.0  0.0      0     0 ?        Z    12:16   0:00 [watchdog-test.b] <defunct>
root     17535  0.0  0.0      0     0 ?        Z    12:17   0:00 [watchdog-test.b] <defunct>

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • watchdog
    • One or more scripts or programs exist in /etc/watchdog.d

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