ABL Session shutdown is never logged, neither on agent shutdown nor when the terminateABLSession JMX query is run.
An ABL session's startup is logged in the agent log but a session's shutdown is never logged.
If the terminateABLSession JMX query is run with a 0 terminate option, then the stop message may be written into the agent log (depending on application code).
However, the ABL session's termination is not logged when executing the terminateABLSession JMX query with a terminate option of 1 or 2.
On session start, messages like the below are written to the agent log.
YYYY-MM-DDThh:mm:ss.###-0400 012345 056789 1 AS-4 mtapsv:-:? -- Log entry types activated: ASPlumbing,DB.Connects
YYYY-MM-DDThh:mm:ss.###-0400 012345 056789 2 AS-4 mtapsv:-:? AS Starting MSAS Session for scaler.
YYYY-MM-DDThh:mm:ss.###-0400 012345 056789 2 AS-4 mtapsv:-:? AS MSAS Session Startup. (5473)
There is no corresponding "Destroying Session" message by default.