[jira] [Created] (UIMA-3814) DUCC check_ducc and start_ducc should detect and handle ssh hangs

[Jim Challenger (JIRA)]

Jim Challenger created UIMA-3814:
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             Summary: DUCC check_ducc and start_ducc should detect and handle 
ssh hangs
                 Key: UIMA-3814
                 URL: https://issues.apache.org/jira/browse/UIMA-3814
             Project: UIMA
          Issue Type: Improvement
          Components: DUCC
    Affects Versions: 1.1.0-Ducc
            Reporter: Jim Challenger
            Assignee: Jim Challenger
             Fix For: 1.1.0-Ducc


Broken nodes can cause ssh hangs, e.g. if NFS is broken.  Check_ducc and 
start_ducc should handle this.

Proposed design: it's nearly impossible to stop the ssh without a ctl-c -like 
interrupt if the remote work is stuck in NFS.  check_ducc and start_ducc will 
catch the ctl-c, terminate any stuck ssh's, and report on the nodes that didn't 
return correctly.



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