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From "Rakesh R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4185) Add a metric for number of active leases
Date Mon, 04 May 2015 06:32:06 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14526310#comment-14526310
] 

Rakesh R commented on HDFS-4185:
--------------------------------

Attaching another patch addressing the checkstyle comment. [~kihwal] Please have a look at
the patch, thanks!

FYI: There is one more checkstyle comment reported but this is not related to my patch.
{code}
./hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:1:
File length is 8,290 lines (max allowed is 2,000).
{code}

> Add a metric for number of active leases
> ----------------------------------------
>
>                 Key: HDFS-4185
>                 URL: https://issues.apache.org/jira/browse/HDFS-4185
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 0.23.4, 2.0.2-alpha
>            Reporter: Kihwal Lee
>            Assignee: Rakesh R
>         Attachments: HDFS-4185-001.patch, HDFS-4185-002.patch, HDFS-4185-003.patch
>
>
> We have seen cases of systematic open file leaks, which could have been detected if we
have a metric that shows number of active leases.



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