GitHub user sihuazhou opened a pull request:
https://github.com/apache/flink/pull/5930
[FLINK-9263][state] Fix concurrency problem in DefaultOperatorStateBackend.
## What is the purpose of the change
This PR fixes the concurrency problem in `DefaultOperatorStateBackend`, the
reason for this bug is that when performing checkpoint we didn't create a true
`deepCopy` of the `registeredOperatorStates` and `registeredBroadcastStates`.
## Brief change log
- *create a truly deep copy of `registeredBroadcastStates` and
`registeredOperatorStates` when performing checkpoint*
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
## 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
no
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sihuazhou/flink
fixConcurrencyProblemInOperatorStateBackend
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5930.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 #5930
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commit 93aaa53ddb43f644fa572aedd914159f88516c84
Author: sihuazhou <summerleafs@...>
Date: 2018-04-27T12:42:33Z
fix concurrency problem in DefaultOperatorStateBackend.
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