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https://issues.apache.org/jira/browse/FLINK-7952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hai Zhou UTC+8 updated FLINK-7952:
----------------------------------
    Description: 
It would be useful to track logging events .

*impl:*
adds event counting via a custom Log4J Appender, this tracks the number of 
INFO, WARN, ERROR and FATAL logging events.

*ref:*
hadoop-common: [org.apache.hadoop.log.metrics. EventCounter 
|https://github.com/apache/hadoop/blob/f67237cbe7bc48a1b9088e990800b37529f1db2a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/log/metrics/EventCounter.java]

  was:
It would be useful to track logging events .

*impl:*
adds event counting via a custom Log4J Appender, this tracks the number of 
INFO, WARN, ERROR and FATAL logging events.


> Add metrics for counting logging events 
> ----------------------------------------
>
>                 Key: FLINK-7952
>                 URL: https://issues.apache.org/jira/browse/FLINK-7952
>             Project: Flink
>          Issue Type: Wish
>          Components: Metrics
>    Affects Versions: 1.4.0
>            Reporter: Hai Zhou UTC+8
>            Assignee: Hai Zhou UTC+8
>            Priority: Critical
>             Fix For: 1.5.0
>
>
> It would be useful to track logging events .
> *impl:*
> adds event counting via a custom Log4J Appender, this tracks the number of 
> INFO, WARN, ERROR and FATAL logging events.
> *ref:*
> hadoop-common: [org.apache.hadoop.log.metrics. EventCounter 
> |https://github.com/apache/hadoop/blob/f67237cbe7bc48a1b9088e990800b37529f1db2a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/log/metrics/EventCounter.java]



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