Zhiwen Sun created SPARK-20692:
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Summary: unknowing delay in event timeline
Key: SPARK-20692
URL: https://issues.apache.org/jira/browse/SPARK-20692
Project: Spark
Issue Type: Bug
Components: DStreams
Affects Versions: 1.6.2
Environment: Spark 1.6.1 + kafka 0.8.2
Reporter: Zhiwen Sun
Spark streaming job with 1s interval.
Process time of micro batch suddenly became to 4s while is is usually 0.4s .
when we check where time spent, we find a unknown delay in job. there is no
executor computing or shuffle reading. About 4s blank in event timeline,
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