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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5677) Need error checking for HA cluster configuration
Date Wed, 15 Jan 2014 13:27:29 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13872046#comment-13872046

Hudson commented on HDFS-5677:

FAILURE: Integrated in Hadoop-Hdfs-trunk #1645 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1645/])
HDFS-5677. Need error checking for HA cluster configuration. Contributed by Vincent Sheffer.
(cos: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1558217)
* /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/DFSUtil.java

> Need error checking for HA cluster configuration
> ------------------------------------------------
>                 Key: HDFS-5677
>                 URL: https://issues.apache.org/jira/browse/HDFS-5677
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode, ha
>    Affects Versions: 2.0.6-alpha
>         Environment: centos6.5, oracle jdk6 45, 
>            Reporter: Vincent Sheffer
>            Assignee: Vincent Sheffer
>            Priority: Minor
>             Fix For: 3.0.0, 2.3.0
>         Attachments: HDFS-5677.patch
> If a node is declared in the *dfs.ha.namenodes.myCluster* but is _not_ later defined
in subsequent *dfs.namenode.servicerpc-address.myCluster.nodename* or *dfs.namenode.rpc-address.myCluster.XXX*
properties no error or warning message is provided to indicate that.
> The only indication of a problem is a log message like the following:
> {code}
> WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: myCluster:8020
> {code}
> Another way to look at this is that no error or warning is provided when a servicerpc-address/rpc-address
property is defined for a node without a corresponding node declared in *dfs.ha.namenodes.myCluster*.
> This arose when I had a typo in the *dfs.ha.namenodes.myCluster* property for one of
my node names.  It would be very helpful to have at least a warning message on startup if
there is a configuration problem like this.

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