z/OS Agent - Job status: Vanished / EDC8127I

Document ID : KB000103376
Last Modified Date : 02/08/2018
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When the z/OS Agent is started with the default ini parameter (parameter LISTEN without a value) and the Job monitor UCXJM25M is utilized (UC_EX_JOB_MD=UCXJM25M) for job status tracking, the AE does not recognize any job status changes.
The agent-log shows the error message:
"EDC8127I Connection timed out."

Normal job tracking is blocked and jobs may have status "Vanished" in AE.

z/OS agent V12.1.1
Job monitor: UCXJM25M
Defect. The 12.1.1 version of the z/OS agent is shipped with parameter "LISTEN=" instead of "LISTEN=10"
The default ini has been fixed in version 12.1.2 or above of the z/OS agent. 

Set the LISTEN parameter to LISTEN=10 or remove it completely from the ini-file