Adam Antal created YARN-9676:
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Summary: 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
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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