KevinyhZou opened a new pull request #18208:
URL: https://github.com/apache/flink/pull/18208
## What is the purpose of the change
Enable hive source file splits asynchronous enumerate in olap query , which
would be better to the task deployment .
## Brief change log
Implements the function of source file asynchronous enumerate in
HiveSourceFileEnumerator#enumerateSplitsAsync. when submit the query and the
source coordinator start, it will call the `enumerateSplitsAsync` method to
enumerate splits , which would submit a task to asynchronous enumerate splits,
and meanwhile the olap query task will be deployed. Then, the source
operator(reader) will use `sendSplitRequest` to get the split, and read the
data.
## Verifying this change
Test manually by running a sql query submitted by sql client, and the hive
source table has thousands of partitions. at first, the source split enumerate
will block the task deployment for above 1 minute, by use this feature, it down
to within 1 second.
## 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): (don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes)
- 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 / docs / JavaDocs
/ not documented)
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