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Posted to issues@spark.apache.org by "Arun Mahadevan (JIRA)" <ji...@apache.org> on 2018/07/19 20:20:00 UTC

[jira] [Created] (SPARK-24863) Report offset lag as a custom metrics for Kafka structured streaming source

Arun Mahadevan created SPARK-24863:
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             Summary: Report offset lag as a custom metrics for Kafka structured streaming source
                 Key: SPARK-24863
                 URL: https://issues.apache.org/jira/browse/SPARK-24863
             Project: Spark
          Issue Type: Sub-task
          Components: Structured Streaming
    Affects Versions: 2.4.0
            Reporter: Arun Mahadevan


We can build on top of SPARK-24748 to report offset lag as a custom metrics for Kafka structured streaming source.

This is the difference between the latest offsets in Kafka the time the metrics is reported (just after a micro-batch completes) and the latest offset Spark has processed. It can be 0 (or close to 0) if spark keeps up with the rate at which messages are ingested into Kafka topics in steady state.



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