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https://issues.apache.org/jira/browse/HBASE-11142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13993265#comment-13993265
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Matteo Bertozzi commented on HBASE-11142:
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for snapshot in trunk the problem should be reduced since there are no longer
all the file creation per hfile in the table.
but this is not a snapshot problem, it also happen on the normal read path when
we are using pread() see HBASE-9393.
Also this seems only a problem with hadoop 2.0, which is mitigate by HDFS-4911
> Taking snapshots can leave sockets on the master stuck in CLOSE_WAIT state
> --------------------------------------------------------------------------
>
> Key: HBASE-11142
> URL: https://issues.apache.org/jira/browse/HBASE-11142
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.2, 0.99.0, 0.96.1.1, 0.98.2
> Reporter: Andrew Purtell
>
> As reported by Hansi Klose on user@.
> {quote}
> we use a script to take on a regular basis snapshot's and delete old one's.
> We recognizes that the web interface of the hbase master was not working any
> more because of too many open files.
> The master reaches his number of open file limit of 32768
> When I run lsof I saw that there where a lot of TCP CLOSE_WAIT handles open
> with the regionserver as target.
> On the regionserver there is just one connection to the hbase master.
> I can see that the count of the CLOSE_WAIT handles grow each time
> i take a snapshot. When i delete on nothing changes.
> Each time i take a snapshot there are 20 - 30 new CLOSE_WAIT handles.
> {quote}
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