[GitHub] [flink] syhily opened a new pull request, #20502: Improve the Pulsar source performance when meeting small data source

[GitBox <gi...@apache.org>]

syhily opened a new pull request, #20502:
URL: https://github.com/apache/flink/pull/20502

   ## What is the purpose of the change
   
   When using Pulsar Source to consume data, if the data rate is small, e.g. 2 msg/s, there will be long periods of time when no messages are consumed.
   
   This is caused by the default `PulsarSourceOptions.PULSAR_MAX_FETCH_TIME` and `PulsarSourceOptions.PULSAR_MAX_FETCH_RECORDS` options. Pulsar Source will try to pull messages until any conditions exceed. Such as fetch until 100 messages or fetch 10 seconds.
   
   We have to add a new fetch time option for Pulsar Source. We would consider there is no message on the current topic if this fetch time exceeds. This would make sure the source would stop fetching messages when the 100ms exceed. Avoid hanging on small message income rates.
   
   ## Brief change log
   
     - Add new `PulsarSourceOptions.PULSAR_DEFAULT_FETCH_TIME` option.
     - Change the polling timeout to `PulsarSourceOptions.PULSAR_DEFAULT_FETCH_TIME`.
   
   ## Verifying this change
   
   This change is already covered by existing tests, such as *PulsarOrderedPartitionSplitReaderTest*, *PulsarUnorderedPartitionSplitReaderTest*.
   
   ## 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)
     - If yes, how is the feature documented? (not applicable)
   


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[GitHub] [flink] syhily closed pull request #20502: [FLINK-28870][Connector/Pulsar] Improve the Pulsar source performance when meeting small data source

[GitBox <gi...@apache.org>]

syhily closed pull request #20502: [FLINK-28870][Connector/Pulsar] Improve the Pulsar source performance when meeting small data source
URL: https://github.com/apache/flink/pull/20502


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[GitHub] [flink] flinkbot commented on pull request #20502: [FLINK-28870][Connector/Pulsar] Improve the Pulsar source performance when meeting small data source

[GitBox <gi...@apache.org>]

flinkbot commented on PR #20502:
URL: https://github.com/apache/flink/pull/20502#issuecomment-1208178353

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   ## CI report:
   
   * b4420cc24a6675ce7aeb357797308dc8f6cb094e UNKNOWN
   
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