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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/41138/
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(Updated Dec. 15, 2015, 7:03 p.m.)


Review request for Ambari, Alejandro Fernandez, Jonathan Hurley, Jayush Luniya, 
and Nate Cole.


Changes
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Uploaded a draft of patch with approach we discussed. Seems to work


Summary (updated)
-----------------

[preview]While doing express upgrade multiple Clients and Services Failed to 
start


Bugs: AMBARI-14293
    https://issues.apache.org/jira/browse/AMBARI-14293


Repository: ambari


Description
-------

During nightly run over Centos7 express upgrade test cases failed because of 
TEZ Client issue.

Restart of Tez Client failed after upgrade because of conf file missing.

After logging on box I found the soft links /etc/tez/conf & 
/usr/hdp/current/tez-client/conf pointing in loop to each other.

[root@os-r7-test-2 tez-client]# ls -l /usr/hdp/2.3.4.0-3426/tez/conf
lrwxrwxrwx. 1 root root 13 Dec  8 05:05 /usr/hdp/2.3.4.0-3426/tez/conf -> 
/etc/tez/conf
[root@os-r7-test-2 tez-client]# ls -l /etc/tez/conf
lrwxrwxrwx. 1 root root 32 Dec  8 02:23 /etc/tez/conf -> 
/usr/hdp/current/tez-client/conf
[root@os-r7-test-2 tez-client]# ls -l /usr/hdp/current/tez-client/conf
lrwxrwxrwx. 1 root root 13 Dec  8 05:05 /usr/hdp/current/tez-client/conf -> 
/etc/tez/conf
[root@os-r7-test-2 tez-client]#


Error on UI
{code}
Traceback (most recent call last):
File 
"/var/lib/ambari-agent/cache/common-services/TEZ/0.4.0.2.1/package/scripts/tez_client.py",
 line 104, in <module>
TezClient().execute()
File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
 line 217, in execute
method(env)
File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py",
 line 486, in restart
self.pre_upgrade_restart(env, upgrade_type=upgrade_type)
File 
"/var/lib/ambari-agent/cache/common-services/TEZ/0.4.0.2.1/package/scripts/tez_client.py",
 line 59, in pre_upgrade_restart
conf_select.select(params.stack_name, "tez", params.version)
File 
"/usr/lib/python2.6/site-packages/resource_management/libraries/functions/conf_select.py",
 line 247, in select
shell.checked_call(get_cmd("set-conf-dir", package, version), logoutput=False, 
quiet=False, sudo=True)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 
70, in inner
result = function(command, **kwargs)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 
92, in checked_call
tries=tries, try_sleep=try_sleep)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 
140, in _call_wrapper
result = _call(command, **kwargs_copy)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 
291, in _call
raise Fail(err_msg)
resource_management.core.exceptions.Fail: Execution of 'conf-select 
set-conf-dir --package tez --stack-version 2.3.4.0-3426 --conf-version 0' 
returned 1. /usr/hdp/2.3.4.0-3426/tez/conf does not exist
{code}


Observed this issue for other components too AFTER 'Ignore and Proceed' the Tez 
client error
The error was seen for following components:
Pig client, Hive server, Metastore, Hive client, Spark service, spark client. 
See attached file for output


Diffs (updated)
-----

  
ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py
 cd3fa5c 
  ambari-server/src/main/resources/custom_actions/scripts/install_packages.py 
ae66fe0 

Diff: https://reviews.apache.org/r/41138/diff/


Testing
-------

mvn clean test


Thanks,

Dmitro Lisnichenko

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