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https://issues.apache.org/jira/browse/HDFS-4591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601568#comment-13601568
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Hudson commented on HDFS-4591:
------------------------------
Integrated in Hadoop-trunk-Commit #3466 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/3466/])
HDFS-4591. HA clients can fail to fail over while Standby NN is performing
long checkpoint. Contributed by Aaron T. Myers. (Revision 1456107)
Result = SUCCESS
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1456107
Files :
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/test/GenericTestUtils.java
* /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/security/token/delegation/DelegationTokenSecretManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/Namesystem.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/HAContext.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestStandbyCheckpoints.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestStandbyIsHot.java
> HA clients can fail to fail over while Standby NN is performing long
> checkpoint
> -------------------------------------------------------------------------------
>
> Key: HDFS-4591
> URL: https://issues.apache.org/jira/browse/HDFS-4591
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, namenode
> Affects Versions: 2.0.4-alpha
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Fix For: 2.0.5-beta
>
> Attachments: HDFS-4591.patch, HDFS-4591.patch, HDFS-4591.patch
>
>
> Clients know to fail over to talk to the Active NN when they perform an RPC
> to the Standby NN and it throws a StandbyException. However, most places in
> the code that check if the NN is in the standby state do so inside the FSNS
> fsLock. Since this lock is held for the duration of the saveNamespace during
> a checkpoint, StandbyExceptions will not be thrown during this time.
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