License Server freezes periodically

Description

Users may report intermittent freezing of the License Service. This typically means the service will occasionally stop running and the License Server Administrator becomes unresponsive. Users are also unable to start the license service again from the License Server Administrator. Users may see the following error in the lmgrd log:

Wrong hostid on SERVER line for license file:
Server line says VM_UUID=xxxxxxxxxxxxxxx, hostid is VM_UUID=xxxxxxxxxxxxxxxx
Invalid hostid on SERVER line

An image of a log file with this error is shown below:

Cause

This can be caused by a service.txt file configuration that references an incorrect VM UUID or MAC Address. A VM UUID or MAC address in the service.txt file means that ArcGIS Pro named user licenses for Portal have been authorized on the license server. There seems to be three configurations that can lead to this issue:

• If there is a mismatch between the MAC address or VM UUID in the license file created in MyEsri and that specified in the service.txt file. This may occur if a service.txt file is carried over from a previous installation.
• If there is a mismatch between the MAC address or VM UUID specified in the service.txt file and the actual machine identifiers in the License Server administrator.
• If a VM UUID consisting entirely of zeroes is specified in the License Server Administrator machine identifiers, and as a result is specified as such in the license file.

Solution or Workaround

Stopping and Starting the ArcGIS License Service from the Services app resolves the freeze temporarily, however it does not solve it completely. The issue will return given the incorrect configuration. The user must edit, or cancel and recreate, the named user license file in MyEsri and specify the correct VM UUID or MAC address to match the machine identifiers of the License Server machine. For more information on creating the named user license file, please see the following link: Creating a license file in My Esri for Enterprise portal 10.7 and later.

In the case of the third issue above, where a VM UUID consisting entirely of zeroes is specified in the License Server Administrator machine identifiers, a VM UUID may need to be assigned to the machine first (if the machine is a virtual machine) and the license file re-created in MyEsri with the correct VM UUID.