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https://issues.apache.org/jira/browse/FLINK-7595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16155315#comment-16155315
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Chesnay Schepler commented on FLINK-7595:
-----------------------------------------
although this is rather odd as we have tests that specifically test for
removing operators; see {{ChainLengthDecreaseTest}}.
> Removing stateless task from task chain breaks savepoint restore
> ----------------------------------------------------------------
>
> Key: FLINK-7595
> URL: https://issues.apache.org/jira/browse/FLINK-7595
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Reporter: Ufuk Celebi
> Assignee: Chesnay Schepler
> Attachments: ChainedTaskRemoveTest.java
>
>
> When removing a stateless operator from a 2-task chain where the head
> operator is stateful breaks savepoint restore with
> {code}
> Caused by: java.lang.IllegalStateException: Failed to rollback to savepoint
> /var/folders/py/s_1l8vln6f19ygc77m8c4zhr0000gn/T/junit1167397515334838028/junit8006766303945373008/savepoint-cb0bcf-3cfa67865ac0.
> Cannot map savepoint state...
> {code}
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