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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2812) When becoming active, NN should treat all leases as freshly renewed
Date Fri, 20 Jan 2012 13:04:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13189785#comment-13189785

Hudson commented on HDFS-2812:

Integrated in Hadoop-Hdfs-HAbranch-build #53 (See [https://builds.apache.org/job/Hadoop-Hdfs-HAbranch-build/53/])
    HDFS-2812. When becoming active, the NN should treat all leases as freshly renewed. Contributed
by Todd Lipcon.

todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1233612
Files : 
* /hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-1623.txt
* /hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/LeaseManager.java
* /hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NameNodeAdapter.java
* /hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHAStateTransitions.java

> When becoming active, NN should treat all leases as freshly renewed
> -------------------------------------------------------------------
>                 Key: HDFS-2812
>                 URL: https://issues.apache.org/jira/browse/HDFS-2812
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>             Fix For: HA branch (HDFS-1623)
>         Attachments: hdfs-2812.txt, hdfs-2812.txt
> I haven't seen this yet in practice, but I think the following is a bug:
> - Clients currently only renew leases to the active NN
> - Leases are written into the log when created, but there is no record to renew them
> - In Standby state, we don't check leases for expiration. But, when we fail over and
start the lease monitor, since the leases haven't been renewed, they might end up getting
incorrectly released.

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