autofs automount expiration / remount is causing mountpoints to hang in RHEL5

Solution Verified - Updated -

Issue

  • There is an automount bug running kernel-2.6.18-194.el5 and autofs-5.0.1-0.rc2.143.el5. The logs show that mkdir invoked automount to mount an NFS mountpoint and remains stuck with autofs4_wait in it's wait channel. Follow-on processes also trying to use the mount point end up in a D state.

Environment

  • Red Hat Enterprise Linux (RHEL) 5.5 - 5.7
  • kernel 2.6.18-194.el5 - 2.6.18-274.el5

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