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From "Alejandro Fernandez" <afernan...@hortonworks.com>
Subject Review Request 30708: RU - Prepare Namenode fails on Ubuntu12 due to path error with import
Date Fri, 06 Feb 2015 03:35:29 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/30708/
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Review request for Ambari, Dmitro Lisnichenko, Jonathan Hurley, Nate Cole, Tom Beerbower,
and Yurii Shylov.


Bugs: AMBARI-9507
    https://issues.apache.org/jira/browse/AMBARI-9507


Repository: ambari


Description
-------

Prepare namenode failed during RU on Ubuntu12, retry does not help.

This is because ru_execute_task.py calls python directly, instead of the python wrapper that
appends several other directories to the PYTHONPATH environment variable, which is needed
by the module imports.

```
2015-02-03 03:11:47,374 - Task. Type: EXECUTE, Script: scripts/namenode.py - Function: prepare_rolling_upgrade
2015-02-03 03:11:47,395 - call['python /var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py
prepare_rolling_upgrade /var/lib/ambari-agent/data/command-274.json /var/lib/ambari-agent/cache/custom_actions
/var/lib/ambari-agent/data/structured-out-274.json INFO /var/lib/ambari-agent/data/tmp'] {}
2015-02-03 03:11:47,451 - Command: python /var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py
prepare_rolling_upgrade /var/lib/ambari-agent/data/command-274.json /var/lib/ambari-agent/cache/custom_actions
/var/lib/ambari-agent/data/structured-out-274.json INFO /var/lib/ambari-agent/data/tmp
Code: 1, Out: Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py",
line 24, in <module>
    from resource_management import *
ImportError: No module named resource_management
2015-02-03 03:11:47,452 - Error while executing command 'actionexecute':
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
line 184, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/custom_actions/scripts/ru_execute_tasks.py", line 146,
in actionexecute
    raise Fail(out)
Fail: Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts/namenode.py",
line 24, in <module>
    from resource_management import *
ImportError: No module named resource_management
```


Diffs
-----

  ambari-server/src/main/resources/custom_actions/scripts/ru_execute_tasks.py 02c449f 

Diff: https://reviews.apache.org/r/30708/diff/


Testing
-------

Verified that this works during a Rolling Upgrade on an Ubuntu cluster.

Unit tests are in progress.


Thanks,

Alejandro Fernandez


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