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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6604) The short-circuit cache doesn't correctly time out replicas that haven't been used in a while
Date Thu, 03 Jul 2014 11:31:30 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14051342#comment-14051342
] 

Hudson commented on HDFS-6604:
------------------------------

SUCCESS: Integrated in Hadoop-Yarn-trunk #602 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/602/])
HDFS-6604. The short-circuit cache doesn't correctly time out replicas that haven't been used
in a while (cmccabe) (cmccabe: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1607456)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/shortcircuit/ShortCircuitCache.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/shortcircuit/TestShortCircuitCache.java


> The short-circuit cache doesn't correctly time out replicas that haven't been used in
a while
> ---------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6604
>                 URL: https://issues.apache.org/jira/browse/HDFS-6604
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.4.0
>         Environment: Centos 6.5 and distribution Hortonworks Data Platform v2.1
>            Reporter: Giuseppe Reina
>            Assignee: Colin Patrick McCabe
>            Priority: Critical
>             Fix For: 2.5.0
>
>         Attachments: HDFS-6604.001.patch, HDFS-6604.002.patch
>
>
> When HDFS shortcircuit is enabled, the file descriptors of the deleted HDFS blocks are
kept open until the cache is full. This prevents the operating system to free the space on
disk. 
> More details on the [mailing list thread|http://mail-archives.apache.org/mod_mbox/hbase-user/201406.mbox/%3CCAPjB-CA3RV=SLhUHwUE5CV3PC4+rFfz10-TkYdBfS9RT2DeKPw@mail.gmail.com%3E]



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