automount does not work after hitting error "lookup_one: lookup(ldap): query failed for..."

Solution Verified - Updated -

Issue

  • Users' home directories are automounted via NFS, and it is working well for long time. But it does not work anymore after hitting error below:
Jul 27 13:19:11 nfs-client automount[1578]: lookup_one: lookup(ldap): query failed for (&(objectclass=automount)(|(automountKey=username)(automountKey=/)(automountKey=\2A)))
Jul 27 13:19:11 nfs-client automount[1578]: setautomntent: lookup(sss): setautomntent: No such file or directory
Jul 27 13:19:11 nfs-client automount[1578]: key "username" not found in map source(s).
  • Both service sssd and autofs have been restarted, but the issue still exists.
  • The affected NFS shares can be successfully mounted manually.

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • automount + NFS + LDAP + sssd

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