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https://issues.apache.org/jira/browse/FLINK-6742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16027496#comment-16027496
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Chesnay Schepler commented on FLINK-6742:
-----------------------------------------
Why is the state incompatible? Is this tied to upgrading Flink or a change in
the user code?
At the moment i can only think of the following workarounds:
1. Remove the operators from the topology and load them in 1.2 while allowing
non-restored State. Take a new savepoint, add your operators, load in 1.3.
2. Add 2 no-op operators to the topology and assign them the UID's of the
operators you want to drop. Load 1.2 savepoint, create 1.3 SP, drop operators,
reload.
> Savepoint conversion might fail if operators change
> ---------------------------------------------------
>
> Key: FLINK-6742
> URL: https://issues.apache.org/jira/browse/FLINK-6742
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.3.0
> Reporter: Gyula Fora
> Priority: Critical
>
> Caused by: java.lang.NullPointerException
> at
> org.apache.flink.runtime.checkpoint.savepoint.SavepointV2.convertToOperatorStateSavepointV2(SavepointV2.java:171)
> at
> org.apache.flink.runtime.checkpoint.savepoint.SavepointLoader.loadAndValidateSavepoint(SavepointLoader.java:75)
> at
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.restoreSavepoint(CheckpointCoordinator.java:1090)
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