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https://issues.apache.org/jira/browse/HDFS-2794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13202336#comment-13202336
]
Hudson commented on HDFS-2794:
------------------------------
Integrated in Hadoop-Hdfs-HAbranch-build #71 (See
[https://builds.apache.org/job/Hadoop-Hdfs-HAbranch-build/71/])
HDFS-2794. Active NN may purge edit log files before standby NN has a
chance to read them. Contributed by Todd Lipcon.
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1241317
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/DFSConfigKeys.java
*
/hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNStorageRetentionManager.java
*
/hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
*
/hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNNStorageRetentionFunctional.java
*
/hadoop/common/branches/HDFS-1623/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNNStorageRetentionManager.java
> HA: Active NN may purge edit log files before standby NN has a chance to read
> them
> ----------------------------------------------------------------------------------
>
> Key: HDFS-2794
> URL: https://issues.apache.org/jira/browse/HDFS-2794
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Aaron T. Myers
> Assignee: Todd Lipcon
> Fix For: HA branch (HDFS-1623)
>
> Attachments: hdfs-2794.txt, hdfs-2794.txt
>
>
> Given that the active NN is solely responsible for purging finalized edit log
> segments, and given that the active NN has no way of knowing when the standby
> reads edit logs, it's possible that the standby NN could fail to read all
> edits it needs before the active purges the files.
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