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Date: Fri, 25 Mar 2016 11:54:25 +0000 (UTC)
From: "Andrew Onischuk (JIRA)" <jira@apache.org>
To: issues@ambari.apache.org
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Subject: [jira] [Updated] (AMBARI-14926) ambari cached hdfs.py conflicts
 with python hdfs lib resulting into monitoring errors
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     [ https://issues.apache.org/jira/browse/AMBARI-14926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Onischuk updated AMBARI-14926:
-------------------------------------
    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Committed to trunk and branch-2.2

> ambari cached hdfs.py conflicts with python hdfs lib resulting into monitoring errors
> -------------------------------------------------------------------------------------
>
>                 Key: AMBARI-14926
>                 URL: https://issues.apache.org/jira/browse/AMBARI-14926
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-agent
>    Affects Versions: 2.2.0
>         Environment: Linux CentOS 7 x86_64
>            Reporter: matteo brancaleoni
>            Assignee: Andrew Onischuk
>         Attachments: AMBARI-14926.patch
>
>
> On systems with datanode and journal node monitored by ambari-agent,
> if in the standard python path the hdfs lib is installed ( https://pypi.python.org/pypi/hdfs/ ) it makes datanode + journalnode monitoring fail:
> * datanodes are seen up in global live datanodes
> * but the service is down into the host service list (restart will work, but are marked as stopped)
> looking into the logs I get:
> DEBUG 2016-02-04 16:54:49,160 PythonReflectiveExecutor.py:47 - Running command reflectively ['/usr/bin/python2',
>  u'/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/journalnode.py',
>  'SECURITY_STATUS',
> --
>  '/var/lib/ambari-agent/tmp']
> DEBUG 2016-02-04 16:54:49,170 PythonReflectiveExecutor.py:61 - Reflective command failed with exception:
> Traceback (most recent call last):
>   File "/usr/lib/python2.6/site-packages/ambari_agent/PythonReflectiveExecutor.py", line 55, in run_file
>     imp.load_source('__main__', script)
>   File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/journalnode.py", line 30, in <module>
>     from utils import service
>   File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/utils.py", line 37, in <module>
>     from zkfc_slave import ZkfcSlave
>   File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/zkfc_slave.py", line 21, in <module>
>     from hdfs import hdfs
> ImportError: cannot import name hdfs
> I think that ambari is including its cache files after the python path, so if an hdfs module is present into python path makes the scripts goes crazy.
> (basically using the system hdfs py module and not his own)
> maybe cache files path must be included before the python path or imported with local imports?



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