We have several regional ArcGIS license managers all of which seem to exhibit this issue. Periodically the vendor daemon will exit with the errors show below. On one server the exit status is 255; on another server the status is 9. The cause seems to be the same in both cases.
SERVER1:
14:57:42 (ARCGIS) OUT: "ARC/INFO" username@computername
14:57:43 (lmgrd) ARCGIS exited with status 255 ()
14:57:43 (lmgrd) Since this is an unknown status, license server
14:57:43 (lmgrd) manager (lmgrd) will attempt to re-start the vendor daemon.
14:57:43 (lmgrd) REStarted ARCGIS (pid 4124)
SERVER2:
20:03:42 (ARCGIS) OUT: "Viewer" username@computername
20:03:42 (lmgrd) ARCGIS exited with status 9 signal = 740
20:03:42 (lmgrd) Since this is an unknown status, license server
