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Posted to issues@flink.apache.org by "TanYuxin-tyx (via GitHub)" <gi...@apache.org> on 2023/03/10 08:44:34 UTC

[GitHub] [flink] TanYuxin-tyx opened a new pull request, #22151: [FLINK-31396][network] Replace the nano time by milliseconds as the timeout time for batch read buffer pool

TanYuxin-tyx opened a new pull request, #22151:
URL: https://github.com/apache/flink/pull/22151

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## What is the purpose of the change

When running TPC-DS tests, I encountered the read buffer request timeout because of configuring too less read buffers. But I found the timeout time may be less than 5m occasionally, 5m is the expected time.
I read the docs of `System.nanotime`, the docs say that t1 < t0 should not be used, because of the possibility of numerical overflow.
I tested the `System.currentTimeMillis` and it can work as expected. The timeout time need not be as precise as nano time, and `System.currentTimeMillis` is more efficient than nano time, so I decide to use the mill sec to replace nano time.

## Brief change log

- *Replace the nano time by milliseconds as the timeout time for batch read buffer pool*

## 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): (yes / **no**)
- The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
- Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no**/ don't know)
- The S3 file system connector: (yes / **no** / don't know)

## Documentation

- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not documented)

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[GitHub] [flink] flinkbot commented on pull request #22151: [FLINK-31396][network] Replace the nano time by milliseconds as the timeout time for batch read buffer pool

Posted by "flinkbot (via GitHub)" <gi...@apache.org>.

flinkbot commented on PR #22151:
URL: https://github.com/apache/flink/pull/22151#issuecomment-1463469110

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   ## CI report:
   
   * b28a752625b5403e385a96944a674983c3cf0a7c UNKNOWN
   
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[GitHub] [flink] reswqa closed pull request #22151: [FLINK-31396][network] Replace the nano time by milliseconds as the timeout time for batch read buffer pool

Posted by "reswqa (via GitHub)" <gi...@apache.org>.

reswqa closed pull request #22151: [FLINK-31396][network] Replace the nano time by milliseconds as the timeout time for batch read buffer pool
URL: https://github.com/apache/flink/pull/22151


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