Summary

Lost connection to lmgrd, heartbeat timeout expired, exiting. EXITING DUE TO SIGNAL 37 Exit reason 5

Symptoms

Occasionally, a vendor daemon may exit and then be restarted by the lmgrd immediately with the following debug log messages shown:

17:46:44 (demo) Lost connection to lmgrd, heartbeat timeout expired, exiting.
17:46:44 (demo) EXITING DUE TO SIGNAL 37 Exit reason 5
17:46:44 (demo) IN: "f1" user1@host1 (SHUTDOWN)
17:46:44 (lmgrd) demo exited with status 37 (Communications error)
17:46:44 (lmgrd) Since this is an unknown status, license server
17:46:44 (lmgrd) manager (lmgrd) will attempt to re-start the vendor daemon.
17:46:44 (lmgrd) REStarted demo (internet tcp_port 33381 pid 8157)
17:46:44 (demo) FLEXnet Licensing version v11.6.1.0 build 66138 amd64_re3
17:46:44 (demo) Server started on host for: f1
17:46:44 (demo) EXTERNAL FILTERS are OFF
17:46:44 (lmgrd) demo using TCP-port 33381

Resolution

If the symptom is observed only in rare occasions, the issue is probably due to the server machine being busy or under heavy workload. This can be true especially when license server is sharing same machine with other server processes (e.g. file server, print server).

Please consider moving the license server to a dedicated machine if the issue repeats frequently and causes considerable interruption of license service.