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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HDFS-3194) DataNode block scanner is running too frequently
Date Thu, 16 Aug 2012 18:33:38 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Uma Maheswara Rao G reopened HDFS-3194:
---------------------------------------


Just re-opned this JIRA to check the above mentioned scenario.
If that scenario works fine, I am fine to close this JIRA.

Andy, could you please confirm me?

Also you can observe the grepped logs in description. for the same block id, it is scanning
for every 15secs exactly. (infact system has only 1 block while testing I guess for more clear
verification on the behavior.)
                
> 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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