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https://issues.apache.org/jira/browse/SPARK-12260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15050906#comment-15050906
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Sean Owen commented on SPARK-12260:
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Isn't this what updateStateByKey and similar methods already accomplish for you?
> Graceful Shutdown with In-Memory State
> --------------------------------------
>
> Key: SPARK-12260
> URL: https://issues.apache.org/jira/browse/SPARK-12260
> Project: Spark
> Issue Type: New Feature
> Components: Streaming
> Reporter: Mao, Wei
> Labels: streaming
>
> Users often stop and restart their streaming jobs for tasks such as
> maintenance, software upgrades or even application logic updates. When a job
> re-starts it should pick up where it left off i.e. any state information that
> existed when the job stopped should be used as the initial state when the job
> restarts.
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