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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5591) Checkpointing should use monotonic time when calculating period
Date Wed, 02 Apr 2014 08:48:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13957471#comment-13957471
] 

Hudson commented on HDFS-5591:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #5446 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/5446/])
HDFS-5591. Checkpointing should use monotonic time when calculating period. Contributed by
Charles Lamb. (wang: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1583926)
* /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/server/namenode/SecondaryNameNode.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/StandbyCheckpointer.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestSecondaryWebUi.java


> Checkpointing should use monotonic time when calculating period
> ---------------------------------------------------------------
>
>                 Key: HDFS-5591
>                 URL: https://issues.apache.org/jira/browse/HDFS-5591
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.2.0
>            Reporter: Andrew Wang
>            Assignee: Charles Lamb
>            Priority: Minor
>              Labels: newbie
>             Fix For: 2.5.0
>
>         Attachments: HDFS-5591.001.patch, HDFS-5591.002.patch, HDFS-5591.003.patch, HDFS-5591.004.patch,
HDFS-5591.005.patch
>
>
> Both StandbyCheckpointer and SecondaryNameNode use {{Time.now}} rather than {{Time.monotonicNow}}
to calculate how long it's been since the last checkpoint. This can lead to issues when the
system time is changed.



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