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https://issues.apache.org/jira/browse/HDFS-7046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14142073#comment-14142073
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Hudson commented on HDFS-7046:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #1902 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1902/])
HDFS-7046. HA NN can NPE upon transition to active. Contributed by (kihwal: rev
9e355719653c5e7b48b601090634882e4f29a743)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
> HA NN can NPE upon transition to active
> ---------------------------------------
>
> Key: HDFS-7046
> URL: https://issues.apache.org/jira/browse/HDFS-7046
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.0.0, 2.5.0
> Reporter: Daryn Sharp
> Assignee: Kihwal Lee
> Priority: Critical
> Fix For: 2.6.0
>
> Attachments: HDFS-7046.patch, HDFS-7046_test_reproduce.patch
>
>
> While processing edits, the NN may decide after adjusting block totals to
> leave safe mode - in the middle of the edit. Going active starts the secret
> manager which generates a new secret key, which in turn generates an edit,
> which NPEs because the edit log is not open.
> # Transitions should _not_ occur in the middle of an edit.
> # The edit log appears to claim it's open for write when the stream isn't
> even open
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