reswqa opened a new pull request, #20647:
URL: https://github.com/apache/flink/pull/20647
## What is the purpose of the change
*When the downstream thread obtains the buffer and consuming it, if the data
is compressed in the spilling thread and copied to the original buffer in the
same time, since the two threads share the same memory data, the consuming
thread will consume incorrect data, causing problems such as deserialize the
data disorder. This pr will fix this problem.*
## Brief change log
- *Move the compression operation to the write thread and store the
compressed buffer directly in memory.*
## Verifying this change
This change is already covered by existing 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, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
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