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https://issues.apache.org/jira/browse/FLINK-5229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15837740#comment-15837740
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Till Rohrmann commented on FLINK-5229:
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Should be fixed. Apparently, there are state handle futures which contain
{{null}} values.
> Cleanup StreamTaskStates if a checkpoint operation of a subsequent operator
> fails
> ----------------------------------------------------------------------------------
>
> Key: FLINK-5229
> URL: https://issues.apache.org/jira/browse/FLINK-5229
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing, TaskManager
> Affects Versions: 1.2.0, 1.1.3
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Fix For: 1.2.0, 1.1.4, 1.3.0
>
>
> Due to chaining, a {{StreamTask}} needs to checkpoint multiple operators. If
> the first operators succeed in creating a checkpoint but a subsequent
> operator in the chain fails, the {{StreamTask}} has to clean up the already
> completed checkpoints. Otherwise we might end up with orphaned state data.
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