Harsh Panchal created SPARK-36798:
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Summary: When SparkContext is stopped, metrics system should be
flushed after listeners have finished processing
Key: SPARK-36798
URL: https://issues.apache.org/jira/browse/SPARK-36798
Project: Spark
Issue Type: Bug
Components: Structured Streaming
Affects Versions: 2.3.2
Reporter: Harsh Panchal
In current implementation, when {{SparkContext.stop()}} is called,
{{metricsSystem.report()}} is called before {{listenerBus.stop()}}. In this
case, if some listener is producing some metrics, they would never reach sink.
Background:
We have some ingestion jobs in Spark Structured Streaming. To monitor them,
collect some metrics like number of input rows, trigger time etc. from
{{QueryProgressEvent}} received via {{StreamingQueryListener}}. These metrics
are then pushed to DB by custom sinks registered in {{MetricsSystem}}. We
noticed that these metrics are lost occasionally for last batch.
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