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From "Alejandro Fernandez (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-6926) HDFS to check data paths are mounted correctly
Date Tue, 19 Aug 2014 21:15:22 GMT
Alejandro Fernandez created AMBARI-6926:
-------------------------------------------

             Summary: HDFS to check data paths are mounted correctly
                 Key: AMBARI-6926
                 URL: https://issues.apache.org/jira/browse/AMBARI-6926
             Project: Ambari
          Issue Type: Improvement
          Components: agent
    Affects Versions: 1.6.1
            Reporter: Alejandro Fernandez
            Assignee: Alejandro Fernandez
             Fix For: 1.7.0


When a drive fails and it is unmounted for service, if the data node process is stopped/started
using Ambari the dfs.data.dir path that was housed on that drive is re-created, but this time
on the / partition leading to out of disk space issues and data being created on the wrong
volume.

In this version, Ambari will have a check to detect when the HDFS data directories are either
under the root mount, or more than one directory is under the same mount.
For example,
* if no external drives are mounted, then /hadoop/hdfs/data will be under the root.
* if the paths are /hadoop/hdfs/data1 and /hadoop/hdfs/data2, but /hadoop/hdfs is the mount
point, then the directories are under the same mount, which is a conflict.

For now, add a "Check Mount" button to the "Service Actions" dropdown for HDFS that will run
on all of the datanodes.



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