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Posted to dev@uima.apache.org by "Jim Challenger (JIRA)" <de...@uima.apache.org> on 2014/03/28 16:02:16 UTC

[jira] [Created] (UIMA-3703) DUCC Add uuid to NodeIdentity

Jim Challenger created UIMA-3703:
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             Summary: DUCC Add uuid to NodeIdentity
                 Key: UIMA-3703
                 URL: https://issues.apache.org/jira/browse/UIMA-3703
             Project: UIMA
          Issue Type: Improvement
          Components: DUCC
            Reporter: Jim Challenger
            Assignee: Jim Challenger
            Priority: Minor


The NodeIdentity should generate a UUID and make it available to interested parties.  The UUID is to be used by RM and WS and maybe others to detect duplicate Agent instances on the same node, the presence of which can cause all sorts of problems including permanently "hung" jobs.

The proposed use of this is for RM to 'blacklist' the duplicate Agents, purging all work from them, and refuse to allocate new work on them until they are cleaned up and whitelisted again.  WS would reveal the problem so admins could  be aware and clean up.

Logic to use this will be implemented later under separate JIRAs.



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