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Posted to issues@spark.apache.org by "Li Yuanjian (JIRA)" <ji...@apache.org> on 2018/01/04 11:48:00 UTC

[jira] [Created] (SPARK-22956) Union Stream Failover Cause `IllegalStateException`

Li Yuanjian created SPARK-22956:
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             Summary: Union Stream Failover Cause `IllegalStateException`
                 Key: SPARK-22956
                 URL: https://issues.apache.org/jira/browse/SPARK-22956
             Project: Spark
          Issue Type: Bug
          Components: Structured Streaming
    Affects Versions: 2.1.0
            Reporter: Li Yuanjian


When we union 2 streams from kafka or other sources, while one of them have no continues data coming and in the same time task restart, this will cause an `IllegalStateException`. This mainly cause because the code in [MicroBatchExecution|https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/MicroBatchExecution.scala#L190]  , while one stream has no continues data, its comittedOffset same with availableOffset during `populateStartOffsets`, and `currentPartitionOffsets` not properly handled in KafkaSource. Also, maybe we should also consider this scenario in other Source.



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