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https://issues.apache.org/jira/browse/HDFS-10713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15488521#comment-15488521
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Erik Krogen commented on HDFS-10713:
------------------------------------
One comment on this is that it would be ideal to change it to use
{{o.a.h.util.Timer.monotonicNow()}} instead of {{Time.monotonicNow()}} to allow
for the unit tests to complete quickly without real sleeps, especially now that
we have a longer sleep for the reporting threshold. However I plan to do this
as part of the work in progress in HDFS-10475 so I wouldn't worry about it
here.
Good work! Thanks for incorporating my read lock reporting changes into this
throttling.
> Throttle FsNameSystem lock warnings
> -----------------------------------
>
> Key: HDFS-10713
> URL: https://issues.apache.org/jira/browse/HDFS-10713
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: logging, namenode
> Reporter: Arpit Agarwal
> Assignee: Hanisha Koneru
> Attachments: HDFS-10713.000.patch, HDFS-10713.001.patch,
> HDFS-10713.002.patch, HDFS-10713.003.patch, HDFS-10713.004.patch,
> HDFS-10713.005.patch, HDFS-10713.006.patch
>
>
> The NameNode logs a message if the FSNamesystem write lock is held by a
> thread for over 1 second. These messages can be throttled to at one most one
> per x minutes to avoid potentially filling up NN logs. We can also log the
> number of suppressed notices since the last log message.
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