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https://issues.apache.org/jira/browse/HELIX-53?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13657569#comment-13657569
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kishore gopalakrishna commented on HELIX-53:
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This is a good feature to have and must be fairly easy to add this.
> Allow partitions to be dropped automatically when their instance dies
> ----------------------------------------------------------------------
>
> Key: HELIX-53
> URL: https://issues.apache.org/jira/browse/HELIX-53
> Project: Apache Helix
> Issue Type: Improvement
> Components: helix-core
> Affects Versions: 0.6.0-incubating
> Reporter: Abhishek Rai
> Assignee: Shi Lu
> Priority: Minor
>
> Currently, when creating a session for a new participant, Helix resets
> current states of all assigned partitions from previous session of the same
> participant to the initial state. This may be undesirable for deployments
> where Helix session and assigned partitions by the participant are tightly
> coupled. In such a setup, when a participant loses a session, it also loses
> all associated partitions. The current behavior triggers transitions back to
> the ideal state which may or may not be desirable. Possible workarounds:
> (1) update ideal state to DROPPED on noticing that an instance is not live
> anymore
> (2) (suggested by Kishore) safely clear state from old participant session
> before creating a new session. I'm using this one and so far it's working OK
> for me.
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