ifndef-SleePy opened a new pull request #9207: [FLINK-9526][e2e] Fix unstable 
BucketingSink end-to-end test
URL: https://github.com/apache/flink/pull/9207
 
 
   ## What is the purpose of the change
   
   * Fix unstable end-to-end test for `BucketingSink`
   * The root cause of this unstable case is an unexpected debug log involved. 
This case sets the log level to `DEBUG` for checking the truncating log. 
However it sets the global log level. There might be a debug log "Responding 
with error: ..." in `PartitionRequestServerHandler` if a `PartitionNotFound` 
occurred. This error would fail the error checking due to there is a word 
"error" in this log.
   
   ## Brief change log
   
   * Shrink the `DEBUG` log level to `BucketingSink` only, not global anymore
   
   ## Verifying this change
   
   * This is a test case fixing. And I have tested locally.
   
   ## 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: 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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