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From "Andrew Onischuk (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-17550) While changing NN, DN directories from UI, proper warning should be present for invalid values
Date Mon, 04 Jul 2016 13:11:10 GMT
Andrew Onischuk created AMBARI-17550:
----------------------------------------

             Summary: While changing NN, DN directories from UI, proper warning should be
present for invalid values
                 Key: AMBARI-17550
                 URL: https://issues.apache.org/jira/browse/AMBARI-17550
             Project: Ambari
          Issue Type: Bug
            Reporter: Andrew Onischuk
            Assignee: Andrew Onischuk
             Fix For: 2.4.0
         Attachments: AMBARI-17550.patch

While changing NN and DN directories from ambari, for example:  
changing dn directories from **/grid/0/hadoop/hdfs/data** to **/grid/0/hadoop/
hdfs/data,/grid/0/hadoop/hdfs/data1,/grid/0/hadoop/hdfs/data2**

The values are changed without being validated  
This leads to datanodes start failing

    
    
    
    Traceback (most recent call last):
      File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/datanode.py",
line 174, in <module>
        DataNode().execute()
      File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
line 280, in execute
        method(env)
      File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
line 709, in restart
        self.start(env, upgrade_type=upgrade_type)
      File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/datanode.py",
line 60, in start
        self.configure(env)
      File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/datanode.py",
line 55, in configure
        datanode(action="configure")
      File "/usr/lib/python2.6/site-packages/ambari_commons/os_family_impl.py", line 89, in
thunk
        return fn(*args, **kwargs)
      File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/hdfs_datanode.py",
line 53, in datanode
        data_dir_to_mount_file_content = handle_mounted_dirs(create_dirs, params.dfs_data_dirs,
params.data_dir_mount_file, params)
      File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/mounted_dirs_helper.py",
line 158, in handle_mounted_dirs
        raise Fail(message + " . Please turn off cluster-env/one_dir_per_partition or handle
the situation manually.")
    resource_management.core.exceptions.Fail: Trying to create another directory on the following
mount: /grid/0 . Please turn off cluster-env/one_dir_per_partition or handle the situation
manually.
    

The test fails because it set invalid value, and the directory was not created  
A warning message informing why the new directory name is invalid could be
useful





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