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https://reviews.apache.org/r/51601/
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Review request for Ambari, Alejandro Fernandez, Jayush Luniya, and Vitalyi 
Brodetskyi.


Bugs: AMBARI-18305
    https://issues.apache.org/jira/browse/AMBARI-18305


Repository: ambari


Description
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>From customer case:

We are trying upgrade Ambari from 2.2.2 to Ambari 2.4 with the latest packages 
(1226).

https://issues.apache.org/jira/browse/AMBARI-15947 - "Upgrading Ambari should 
delete any pyc files"

The patch contains the following two lines
{code}
AMBARI_SERVER="${ROOT}/usr/lib/python2.6/site-packages/ambari_server"
find $AMBARI_SEVER/ -name *.pyc -exec rm {} \;
{code}

The AMBARI_SEVER typo basically executes "find / -name *.pyc -exec rm {} \;"
on the root directory and deletes ALL pyc files from the ambari server machine.

This looks like a bug in the latest Ambari package we released yesterday.

Considering the command has both "rm" and "*" in the same line, lets see if we 
can use a safer strategy such as changing the CWD and then deleting files.


Diffs
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  ambari-agent/conf/unix/install-helper.sh 3614659 
  ambari-server/conf/unix/install-helper.sh 369a56a 

Diff: https://reviews.apache.org/r/51601/diff/


Testing
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mvn clean test


Thanks,

Dmitro Lisnichenko

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