GitHub user sihuazhou opened a pull request: https://github.com/apache/flink/pull/5525
[FLINK-8699][hotfix] Fix in concurrency problem for full Checkpoint. This PR fix [FLINK-8699](https://issues.apache.org/jira/browse/FLINK-8699). In fully checkpoint, `kvStateInformation` is not a copied object and it can be changed when writeKVStateMetaData() is invoking ... This can lead to problematic, which is serious. ## Brief change log - Copy `kvStateInformation` to avoid concurrency problem. ## Verifying this change - This change can be verified by the existed unit tests. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no) - The serializers: (no) - The runtime per-record code paths (performance sensitive): (no) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes) - The S3 file system connector: (no) ## Documentation - Does this pull request introduce a new feature? (no) You can merge this pull request into a Git repository by running: $ git pull https://github.com/sihuazhou/flink hotfix_full_checkpoint Alternatively you can review and apply these changes as the patch at: https://github.com/apache/flink/pull/5525.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #5525 ---- commit de191cdd8ab6073cd6c06c3c3f0174f15c08369a Author: sihuazhou <summerleafs@...> Date: 2018-02-19T12:13:58Z fix in concurrency problem for full Checkpoint. ---- ---