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From "Junkai Xue (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HELIX-669) Support state transition cancellation
Date Tue, 26 Sep 2017 21:26:00 GMT
Junkai Xue created HELIX-669:
--------------------------------

             Summary: Support state transition cancellation
                 Key: HELIX-669
                 URL: https://issues.apache.org/jira/browse/HELIX-669
             Project: Apache Helix
          Issue Type: Improvement
          Components: helix-core
            Reporter: Junkai Xue
            Assignee: Junkai Xue
             Fix For: 0.6.9


State transition takes a vital part of Helix managing clusters. There are different reasons
can cause state transition is not necessary, for example, the node of partition running state
transition is down. Thus state transition cancellation would be a useful feature to have in
Helix. It not only helps cancel the state transition to avoid invalid state but also benefits
for reducing redundant state transitions.



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