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https://issues.apache.org/jira/browse/HDFS-9457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15025149#comment-15025149
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Mingliang Liu commented on HDFS-9457:
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Thanks for working on this.
{{DataNode}} has adopted the slf4j logger. For parameters, we should remove all
unnecessary string concatenation and use placeholders instead. Meanwhile, we
should remove guards when calling {{LOG.debug()}} and {{LOG.trace()}}. Please
refer to [HDFS-8971] for an example.
> Datanode Logging Improvement
> ----------------------------
>
> Key: HDFS-9457
> URL: https://issues.apache.org/jira/browse/HDFS-9457
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 3.0.0, 2.7.0
> Reporter: BELUGA BEHR
> Priority: Trivial
> Attachments: Logging.diff
>
>
> Please accept my patch for some minor clean-up of logging. Patch is against
> 3.0.0 but applies to previous versions as well.
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