sshd output a message "Longjump by <pid> in ac_get_pw_groups_timeout (ucache.c)"

Solution Unverified - Updated -

Issue

The following message is output:

authpriv.warning sshd[2291]: Longjump by 2291 in ac_get_pw_groups_timeout (ucache.c).

The messages seems to be output when the server load is high, but it does not show up regularly. When the message was output, the customer did not work on the server. When the message is output, the customer receive an error notification and need to handle it, so they would like to avoid the issue. The message was output 11 seconds later after a ssh connection is started.

Environment

  • Red Hat Enterprise Linux (RHEL) 6 (maybe also other versions are affected)
  • sshd
  • PAM

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