[jira] [Created] (UIMA-5814) UIMA-DUCC: agent should support quiesce request

["Jerry Cwiklik (JIRA)" <de...@uima.apache.org>]

Jerry Cwiklik created UIMA-5814:
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             Summary: UIMA-DUCC: agent should support quiesce request
                 Key: UIMA-5814
                 URL: https://issues.apache.org/jira/browse/UIMA-5814
             Project: UIMA
          Issue Type: Improvement
          Components: DUCC
            Reporter: Jerry Cwiklik
            Assignee: Jerry Cwiklik
             Fix For: 2.2.3-Ducc


Currently when an agent receives stop request through its admin channel it sends SIGTERM to all its running processes and waits 1 minute them to stop. Any process still standing after 1 minute is than killed via SIGKILL. 

In addition to stop request, an agent should support a quiesce request (through an admin channel). When such request is received an agent should send SIGTERM to all its running processes but should not send SIGKILL to allow each process to finish its tasks and exit when done. An agent should not start a timer after sending the SIGTERM.

In an event that a process does not exit, a sys admin can send a stop request to an agent to force termination.

In addition to changes in an agent, modifications are also needed in the RM, perhaps OR, CLI and scripts.



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