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From "Hanifi Gunes (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4202) Handle coordinator/foreman failures to prevent data loss
Date Tue, 15 Dec 2015 22:50:46 GMT
Hanifi Gunes created DRILL-4202:
-----------------------------------

             Summary: Handle coordinator/foreman failures to prevent data loss
                 Key: DRILL-4202
                 URL: https://issues.apache.org/jira/browse/DRILL-4202
             Project: Apache Drill
          Issue Type: Sub-task
            Reporter: Hanifi Gunes
            Priority: Minor


Foreman relies on ephemeral nodes to get rid of zombie profiles. However, foreman failures
still cause loss of profile data. This happens at any non-terminal state where profile is
not yet persisted. The initial proposal is to rely on watchers to detect state changes and
react upon. We can use random back-off or a similar scheme to avoid hammering Zookeeper.



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