gaoyunhaii opened a new pull request #13272:
URL: https://github.com/apache/flink/pull/13272
## What is the purpose of the change
This PR modifies the `NettyBufferPool` to also allocate direct buffers for
the heap buffer request. This enables us not to change the memory footprint
when upgrade Netty to 4.1.50-FINAL. In the future we could further decide how
to adjust the Netty memory management.
## Brief change log
- 3ef9f728f6a8005a7f91846bf32df96ee718c626 returns direct buffers for all
the heap buffer allocation methods.
## 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, Kubernetes/Yarn/Mesos, ZooKeeper: **no**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? **not applicable**
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