nfs4 mount stuck in a LOOKUP_ROOT loop if the operation fails on first attempt

Solution Unverified - Updated -

Issue

  • mount.nfs program is hung mounting an nfs4 filesystem
  • nfs4 mount stuck in a LOOKUP_ROOT loop if the operation fails on first attempt
  • I see a huge number of "getattr" calls being made back-to-back for the same file handle
  • auto mounted nfs share hangs. Can not restart autofs.
  • Using autofs to automount NFS filesystem hangs
  • Autofs hung issue

Environment

  • Red Hat Enterprise Linux 6.4
  • kernel-2.6.32-358.el6 and higher

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