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https://issues.apache.org/jira/browse/YARN-9676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16907375#comment-16907375
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Hudson commented on YARN-9676:
------------------------------

FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #17122 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/17122/])
YARN-9676. Add DEBUG and TRACE level messages to AppLogAggregatorImpl… 
(954799+szilard-nemeth: rev c89bdfacc8715fa6d72acd85437ab8cd257c8aad)
* (edit) 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/AppLogAggregatorImpl.java


> Add DEBUG and TRACE level messages to AppLogAggregatorImpl and connected 
> classes
> --------------------------------------------------------------------------------
>
>                 Key: YARN-9676
>                 URL: https://issues.apache.org/jira/browse/YARN-9676
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Adam Antal
>            Assignee: Adam Antal
>            Priority: Major
>             Fix For: 3.3.0, 3.2.1
>
>
> During the development of the last items of YARN-6875, it was typically 
> difficult to extract information about the internal state of some log 
> aggregation related classes (e.g. {{AppLogAggregatiorImpl}} and 
> {{LogAggregationFileController}}). 
> On my fork I added a few more messages to those classes like:
> - displaying the number of log aggregation cycles
> - displaying the names of the files currently considered for log aggregation 
> by containers
> - immediately displaying any exception caught (and sent to the RM in the 
> diagnostic messages) during the log aggregation process.
> Those messages were quite useful for debugging if any issue occurs, but 
> otherwise it flooded the NM log file with these messages that are usually not 
> needed. I suggest to add (some of) these messages in DEBUG or TRACE level.



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