Jerry Cwiklik created UIMA-3580:
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Summary: DUCC Agent sends STOP instead of QUIESCE to a running
process
Key: UIMA-3580
URL: https://issues.apache.org/jira/browse/UIMA-3580
Project: UIMA
Issue Type: Bug
Components: DUCC
Reporter: Jerry Cwiklik
Assignee: Jerry Cwiklik
Priority: Minor
On process pre-emption (or explicit service stop), the Agent sends a Stop
request to a JP or Service instead of Quiesce. The process receiving such
request, stops all listeners on the input queue and also stops the output
channel preventing any replies from getting back to the client (JD).
The above may also explain intermittent problems with GetMeta timing out. It
looks like GetMeta request comes in, the service receives Stop request and
immediately proceeds to stop the output channel preventing the reply. The
window is very small but its possible cause of the timeout.
If a process is killed via SIGTERM, the registered ShutdownHook correctly
initiates quiesce.
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