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https://issues.apache.org/jira/browse/HDFS-3194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13439062#comment-13439062
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Andy Isaacson commented on HDFS-3194:
-------------------------------------
bq. I did not ran any test with multiple BPs.
OK, thanks for verifying, we will need to test with multiple BPs. It looks
like TestMultipleNNDataBlockScanner might test this case, I will check.
bq. Also worth editing the title also 'DataNode block scanner is running too
frequently'. Because DataBlockScanner will run for every 5secs. The issue is
mainly about frequent logging.
Since the patch has already been submitted with this description, I do not
think that changing the title now is a benefit.
bq. Please consider edditing if you plan to file separate JIRA.
I've filed HDFS-3838, feel free to edit the description there if you feel it's
unclear.
> DataNode block scanner is running too frequently
> ------------------------------------------------
>
> Key: HDFS-3194
> URL: https://issues.apache.org/jira/browse/HDFS-3194
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 2.0.0-alpha
> Reporter: suja s
> Assignee: Andy Isaacson
> Fix For: 2.2.0-alpha
>
> Attachments: HDFS-3194_1.patch, hdfs-3194-1.txt, HDFS-3194_2.patch,
> HDFS-3194_4.patch, HDFS-3194_6.patch, HDFS-3194_7.patch, HDFS-3194.patch
>
>
> Block scanning interval by default should be taken as 21 days(3 weeks) and
> each block scanning should happen once in 21 days.
> Here the block is being scanned continuosly.
> 2012-04-03 10:44:47,056 INFO
> org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner: Verification
> succeeded for
> BP-241703115-xx.xx.xx.55-1333086229434:blk_-2666054955039014473_1003
> 2012-04-03 10:45:02,064 INFO
> org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner: Verification
> succeeded for
> BP-241703115-xx.xx.xx.55-1333086229434:blk_-2666054955039014473_1003
> 2012-04-03 10:45:17,071 INFO
> org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner: Verification
> succeeded for
> BP-241703115-xx.xx.xx.55-1333086229434:blk_-2666054955039014473_1003
> 2012-04-03 10:45:32,079 INFO
> org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner: Verification
> succeeded for BP-241703115-xx.xx.xx.55-1333086229434:blk_-2666054955039014473
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