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https://issues.apache.org/jira/browse/HDFS-6100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941631#comment-13941631
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Hudson commented on HDFS-6100:
------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #515 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/515/])
HDFS-6100. DataNodeWebHdfsMethods does not failover in HA mode. Contributed by
Haohui Mai. (jing9:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1579301)
* /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/datanode/web/resources/DatanodeWebHdfsMethods.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/InetSocketAddressParam.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/NamenodeAddressParam.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/NamenodeRpcAddressParam.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHDFSForHA.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHdfsFileSystemContract.java
> DataNodeWebHdfsMethods does not failover in HA mode
> ---------------------------------------------------
>
> Key: HDFS-6100
> URL: https://issues.apache.org/jira/browse/HDFS-6100
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha
> Affects Versions: 2.4.0
> Reporter: Arpit Gupta
> Assignee: Haohui Mai
> Fix For: 2.4.0
>
> Attachments: HDFS-6100.000.patch, HDFS-6100.001.patch
>
>
> In {{DataNodeWebHdfsMethods}}, the code creates a {{DFSClient}} to connect to
> the NN, so that it can access the files in the cluster.
> {{DataNodeWebHdfsMethods}} relies on the address passed in the URL to locate
> the NN. This implementation has two problems:
> # The {{DFSClient}} only knows about the current active NN, thus it does not
> support failover.
> # The delegation token is based on the active NN, therefore the {{DFSClient}}
> will fail to authenticate of the standby NN in secure HA setup.
> Currently the parameter {{namenoderpcaddress}} in the URL stores the host-ip
> pair that corresponds to the active NN. To fix this bug, this jira proposes
> to store the name service id in the parameter in HA setup (yet the parameter
> stays the same in non-HA setup).
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