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From "Kannan Muthukkaruppan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2243) Regions on FS metric almost always inflated
Date Fri, 10 Dec 2010 00:27:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12970028#action_12970028
] 

Kannan Muthukkaruppan commented on HBASE-2243:
----------------------------------------------

Ran into this in 0.89 just yesterday.

Turned out to be because countRegionsOnFS() relied on TableDirFilter() which is supposed to
ignore all non-table directories. It was ignoring the .logs directory but not .oldlogs directory.
As a result, the Regions on FS count could be reported as higher than the actual value.

But in the latest code base (as part of the new master rewrite commit I think), the web ui
no longer displays Regions on FS metric. The countRegionsOnFS() function also no longer exists
in the code base. So this issue no longer applies. 



> Regions on FS metric almost always inflated
> -------------------------------------------
>
>                 Key: HBASE-2243
>                 URL: https://issues.apache.org/jira/browse/HBASE-2243
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jean-Daniel Cryans
>            Priority: Minor
>             Fix For: 0.92.0
>
>
> The Regions on FS metric is almost always bigger than the real number of regions, it
means we somehow not always clean region directories and they pile up. I guess it shouldn't
be too hard spending some time loading a system until it gets wrong and then see why.

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