The enqueue server or enqueue replicator process is running on both the primary and backup servers at the same time.


If the ERS instance profile is configured to start the instance with Restart_Program instead of Start_Program, the sapstart process will automatically restart the ERS instance when it is terminated for any reason. This will cause unexpected behavior and could lead to a loss of the enqueue server lock table during failover or switchover.


Modify the ASCS and ERS instance profile parameters to use Start_Program instead of Restart_Program when starting the enqueue server and enqueue replicator processes. See Modify ASCS and ERS Instance Profile Settings for more details.

Once the ASCS and ERS profiles have been updated to use Start_Program instead of Restart_Program and SAP Start Service has been restarted, SIOS recommends restarting the system to ensure the updated profile is read and no caching is in effect.

If successful, the ERS instance should only be running on the backup system where the ASCS/SCS instance is not currently running.


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