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Posted to dev@ambari.apache.org by "Andrii Babiichuk (JIRA)" <ji...@apache.org> on 2013/07/03 18:06:21 UTC

[jira] [Created] (AMBARI-2557) Ambari fails to add second Namenode storage directory

Andrii Babiichuk created AMBARI-2557:
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             Summary: Ambari fails to add second Namenode storage directory 
                 Key: AMBARI-2557
                 URL: https://issues.apache.org/jira/browse/AMBARI-2557
             Project: Ambari
          Issue Type: Bug
          Components: client
    Affects Versions: 1.2.3
            Reporter: Andrii Babiichuk
            Assignee: Andrii Babiichuk
             Fix For: 1.2.5


PROBLEM:  When using Ambari UI to add second NameNode storage directory, Ambari fails to produce correct configuration in hdfs-site.xml   

BUSINESS IMPACT:   users might not be able to take advantage of the feature and add second NameNode storage directory.

STEPS TO REPRODUCE:  

1. Stop HDFS and MapReduce on the cluster
2. Go to Ambari UI and navigate to Services Tab and select HDFS
3. Click on Configs Tab under HDFS
4. Add second NameNode storage directory using format below:

/hadoop/hdfs/namenode
/hadoop1/hdfs/namenode

5. Save configuration
6. Start HDFS

ACTUAL BEHAVIOR:  Ambari fails to start HDFS. 

EXPECTED BEHAVIOR:  To be able to make configuration change and to start HDFS.

SUPPORT ANALYSIS: 

Configuration in UI was done similar as during installation process - not using comma separated values.  However, this is not transfered correctly to hdfs-site.xml.  See below the configuration produced by Ambari:

</property>
    <property>
    <name>dfs.name.dir</name>
    <value>/hadoop/hdfs/namenode
/hadoop1/hdfs/namenode</value>
  </property>


Please note that the values are not comma separated as needed for correct configuration to work.

I was able to make configuration work by making following config in UI:

/hadoop/hdfs/namenode,/hadoop1/hdfs/namenode


This produced correct config in hdfs-site.xml.

Please note that during installation input values entering one location per line and produces correct configuration.  Also, there is no guidance in UI to specify how to configure this correctly.

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