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From "Alejandro Fernandez (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-9507) RU - Prepare Namenode fails on Ubuntu12 due to path error with import
Date Sat, 07 Feb 2015 01:16:34 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-9507?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Fernandez updated AMBARI-9507:
----------------------------------------
    Attachment: AMBARI-9507.patch

> RU - Prepare Namenode fails on Ubuntu12 due to path error with import
> ---------------------------------------------------------------------
>
>                 Key: AMBARI-9507
>                 URL: https://issues.apache.org/jira/browse/AMBARI-9507
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Alejandro Fernandez
>            Assignee: Alejandro Fernandez
>             Fix For: 2.0.0
>
>         Attachments: AMBARI-9507.patch
>
>
> 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.
> {code}
> 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
> {code}
> Compare centos6 to ubuntu12 VM.
> {code}
> *Centos 6*
> Uses python2.6
> Sys.path:
> /var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts
> /usr/lib64/python26.zip
> /usr/lib64/python2.6
> /usr/lib64/python2.6/plat-linux2
> /usr/lib64/python2.6/lib-tk
> /usr/lib64/python2.6/lib-old
> /usr/lib64/python2.6/lib-dynload
> /usr/lib64/python2.6/site-packages
> /usr/lib/python2.6/site-packages (inside this there are symlinks)
> Contains symlink and folder
> ls -la /usr/lib/python2.6/site-packages/resource_management
> /usr/lib/python2.6/site-packages/resource_management -> /usr/lib/ambari-agent/lib/resource_management
> *Ubuntu 12*
> Uses python 2.7
> Sys.path:
> /var/lib/ambari-agent/cache/common-services/HDFS/2.1.0.2.0/package/scripts
> /usr/lib/python2.7
> /usr/lib/python2.7/plat-linux2
> /usr/lib/python2.7/lib-tk
> /usr/lib/python2.7/lib-old
> /usr/lib/python2.7/lib-dynload
> /usr/local/lib/python2.7/dist-packages
> /usr/lib/python2.7/dist-packages
> Contains folders:
> /usr/lib/ambari-agent/lib/resource_management/
> /usr/lib/ambari-server/lib/resource_management/
> {code}
> Our ambari-agent setup script calls, export PYTHONPATH=/usr/lib/python2.6/site-packages:$PYTHONPATH
> So this has no effect on Ubuntu.
> install-helper.sh has,
> {code}
> RESOURCE_MANAGEMENT_DIR="/usr/lib/python2.6/site-packages/resource_management"
> ...
> if [ ! -d "$RESOURCE_MANAGEMENT_DIR" ]; then
>   ln -s "$RESOURCE_MANAGEMENT_DIR_AGENT" "$RESOURCE_MANAGEMENT_DIR"
> fi
> {code}



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