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https://issues.apache.org/jira/browse/HDFS-3410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273822#comment-13273822
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Uma Maheswara Rao G commented on HDFS-3410:
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Hi Eli, This duplicate of HDFS-3194?
We noticed this issue.
> BlockPoolSliceScanner is too chatty
> -----------------------------------
>
> Key: HDFS-3410
> URL: https://issues.apache.org/jira/browse/HDFS-3410
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Eli Collins
> Labels: newbie
>
> The "Starting a new period" line gets logged on DNs every 5 seconds with the
> default interval. Looks like this is because startNewPeriod is called by
> scanBlockPoolSlice every 5 seconds and it does an invo level log.
> 2012-05-11 18:54:09,412 INFO
> org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner: Periodic Block
> Verification Scanner initialized with interval 504 hours for block pool
> BP-132016845-172.29.122.91-1336787527316.
> ...
> 2012-05-11 18:54:14,216 INFO
> org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner: Starting a new
> period : work left in prev period : 0.00%
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