beam
https://github.com/apache/beam
Java
Apache Beam is a unified programming model for Batch and Streaming data processing.
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- Issues
- Support executing MapReduce jobs in parallel.
- BigQueryIO write is slow/fail with a bounded source
- Main thread needs to re-throw worker exceptions for ValidatesRunner tests that expects exceptions.
- Key only reads from Google Datastore
- Dropped windows counters / log prints no longer working
- Complete the removal of aggregators from Spark runner.
- Watermark can become unavailable for executors while it's updated with new values
- InMemoryStateInternals MapState / SetState should use StructuralValue for membership / key comparison checks
- ParDo should indicate what "features" are used in DisplayData
- Expose PubsubSource to create UnboundedSource and utilize withMaxNumRecords from BoundedReadFromUnboundedSource
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- Java not yet supported