You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@ambari.apache.org by Jonathan Hurley <jh...@hortonworks.com> on 2015/08/15 06:06:18 UTC

Review Request 37499: RU: Downgrade Fails For All Components From Finalize

-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/37499/
-----------------------------------------------------------

Review request for Ambari, Alejandro Fernandez and Nate Cole.


Bugs: AMBARI-12778
    https://issues.apache.org/jira/browse/AMBARI-12778


Repository: ambari


Description
-------

When downgrading a rolling upgrade from HDP 2.3 back to HDP 2.2, all components will fail with a circular symlink reference. 

The problem is that Ambari changes /etc/component/conf from a directory to a symlink when upgrading to HDP 2.3 from HDP 2.2. During the downgrade, once the component is put back in HDP 2.2, the following is observed:
```
[root@c6401 flume]# ls -l /etc/flume
total 8
drwxr-xr-x 3 root  root 4096 Aug 14 15:44 2.3.2.0-2586
lrwxrwxrwx 1 root  root   34 Aug 14 16:14 conf -> /usr/hdp/current/flume-server/conf
drwxr-xr-x 2 flume root 4096 Aug 14 15:42 conf.backup

(/usr/hdp/2.2.7.0-2816/flume/)
[root@c6401 flume]# ls -l /usr/hdp/current/flume-server/conf
total 16
drwxr-xr-x 2 root root 4096 Aug 14 15:42 bin
lrwxrwxrwx 1 root root   15 Aug 14 15:42 conf -> /etc/flume/conf
drwxr-xr-x 9 root root 4096 Aug 14 15:42 docs
drwxr-xr-x 2 root root 4096 Aug 14 15:42 lib
drwxr-xr-x 2 root root 4096 Aug 14 15:42 tools
```

The solution is to reverse the symlink work done when downgrading from HDP 2.3 back to 2.2.


Diffs
-----

  ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py a676f74 
  ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_handler.py a305ce7 
  ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_upgrade.py 7743619 
  ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/params_linux.py a7efbf6 
  ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py f868002 
  ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml f6823c8 
  ambari-server/src/test/python/custom_actions/test_ru_set_all.py 211443b 

Diff: https://reviews.apache.org/r/37499/diff/


Testing
-------

Verified fix on a cluster where the problem was reproduced.

mvn clean test
----------------------------------------------------------------------
Total run:789
Total errors:0
Total failures:0
OK


Thanks,

Jonathan Hurley


Re: Review Request 37499: RU: Downgrade Fails For All Components From Finalize

Posted by Alejandro Fernandez <af...@hortonworks.com>.
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/37499/#review95558
-----------------------------------------------------------

Ship it!


Ship It!

- Alejandro Fernandez


On Aug. 16, 2015, 2:52 p.m., Jonathan Hurley wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/37499/
> -----------------------------------------------------------
> 
> (Updated Aug. 16, 2015, 2:52 p.m.)
> 
> 
> Review request for Ambari, Alejandro Fernandez and Nate Cole.
> 
> 
> Bugs: AMBARI-12778
>     https://issues.apache.org/jira/browse/AMBARI-12778
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> When downgrading a rolling upgrade from HDP 2.3 back to HDP 2.2, all components will fail with a circular symlink reference. 
> 
> The problem is that Ambari changes /etc/component/conf from a directory to a symlink when upgrading to HDP 2.3 from HDP 2.2. During the downgrade, once the component is put back in HDP 2.2, the following is observed:
> ```
> [root@c6401 flume]# ls -l /etc/flume
> total 8
> drwxr-xr-x 3 root  root 4096 Aug 14 15:44 2.3.2.0-2586
> lrwxrwxrwx 1 root  root   34 Aug 14 16:14 conf -> /usr/hdp/current/flume-server/conf
> drwxr-xr-x 2 flume root 4096 Aug 14 15:42 conf.backup
> 
> (/usr/hdp/2.2.7.0-2816/flume/)
> [root@c6401 flume]# ls -l /usr/hdp/current/flume-server/conf
> total 16
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 bin
> lrwxrwxrwx 1 root root   15 Aug 14 15:42 conf -> /etc/flume/conf
> drwxr-xr-x 9 root root 4096 Aug 14 15:42 docs
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 lib
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 tools
> ```
> 
> The solution is to reverse the symlink work done when downgrading from HDP 2.3 back to 2.2.
> 
> 
> Diffs
> -----
> 
>   ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py a676f74 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_handler.py a305ce7 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_upgrade.py 7743619 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/params_linux.py a7efbf6 
>   ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py f868002 
>   ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml f6823c8 
>   ambari-server/src/test/python/custom_actions/test_ru_set_all.py 211443b 
> 
> Diff: https://reviews.apache.org/r/37499/diff/
> 
> 
> Testing
> -------
> 
> Verified fix on a cluster where the problem was reproduced.
> 
> mvn clean test
> ----------------------------------------------------------------------
> Total run:789
> Total errors:0
> Total failures:0
> OK
> 
> 
> Thanks,
> 
> Jonathan Hurley
> 
>


Re: Review Request 37499: RU: Downgrade Fails For All Components From Finalize

Posted by Jonathan Hurley <jh...@hortonworks.com>.
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/37499/
-----------------------------------------------------------

(Updated Aug. 16, 2015, 10:52 a.m.)


Review request for Ambari, Alejandro Fernandez and Nate Cole.


Changes
-------

Switched to compare_versions which is harder to read conceptually, but at least follows other python scripts for RU.


Bugs: AMBARI-12778
    https://issues.apache.org/jira/browse/AMBARI-12778


Repository: ambari


Description
-------

When downgrading a rolling upgrade from HDP 2.3 back to HDP 2.2, all components will fail with a circular symlink reference. 

The problem is that Ambari changes /etc/component/conf from a directory to a symlink when upgrading to HDP 2.3 from HDP 2.2. During the downgrade, once the component is put back in HDP 2.2, the following is observed:
```
[root@c6401 flume]# ls -l /etc/flume
total 8
drwxr-xr-x 3 root  root 4096 Aug 14 15:44 2.3.2.0-2586
lrwxrwxrwx 1 root  root   34 Aug 14 16:14 conf -> /usr/hdp/current/flume-server/conf
drwxr-xr-x 2 flume root 4096 Aug 14 15:42 conf.backup

(/usr/hdp/2.2.7.0-2816/flume/)
[root@c6401 flume]# ls -l /usr/hdp/current/flume-server/conf
total 16
drwxr-xr-x 2 root root 4096 Aug 14 15:42 bin
lrwxrwxrwx 1 root root   15 Aug 14 15:42 conf -> /etc/flume/conf
drwxr-xr-x 9 root root 4096 Aug 14 15:42 docs
drwxr-xr-x 2 root root 4096 Aug 14 15:42 lib
drwxr-xr-x 2 root root 4096 Aug 14 15:42 tools
```

The solution is to reverse the symlink work done when downgrading from HDP 2.3 back to 2.2.


Diffs (updated)
-----

  ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py a676f74 
  ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_handler.py a305ce7 
  ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_upgrade.py 7743619 
  ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/params_linux.py a7efbf6 
  ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py f868002 
  ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml f6823c8 
  ambari-server/src/test/python/custom_actions/test_ru_set_all.py 211443b 

Diff: https://reviews.apache.org/r/37499/diff/


Testing
-------

Verified fix on a cluster where the problem was reproduced.

mvn clean test
----------------------------------------------------------------------
Total run:789
Total errors:0
Total failures:0
OK


Thanks,

Jonathan Hurley


Re: Review Request 37499: RU: Downgrade Fails For All Components From Finalize

Posted by Jonathan Hurley <jh...@hortonworks.com>.

> On Aug. 16, 2015, 1:05 a.m., Alejandro Fernandez wrote:
> > ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py, line 98
> > <https://reviews.apache.org/r/37499/diff/1/?file=1041017#file1041017line98>
> >
> >     Preferable to use the compare_versions function which is easier to find in the future than hardcoding HDP-2.2
> 
> Jonathan Hurley wrote:
>     I really don't care about the versions here; I care about the stack. It was simple to say source = HDP-2.3 and target = HDP 2.2 ... what's the equivalent code using compare_versions? I'd have to convert the values of `downgrade_from_version` and `version` into normalized versions first, and then compare? Can you give an example?
> 
> Alejandro Fernandez wrote:
>     We have a lot of logic that compares the stack against values like 2.2 or 2.3, and it was done because it was easier at the time to keep adding that type of logic. The rest of the scripts use the compare_version function, so I was suggesting being consistent. I'm ok with the current patch.

I already patched it with your suggestion :)

Can you please check my logic for correctness on compare_version - The unit tests passed, but another set of eyes would be good.


- Jonathan


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/37499/#review95535
-----------------------------------------------------------


On Aug. 16, 2015, 10:52 a.m., Jonathan Hurley wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/37499/
> -----------------------------------------------------------
> 
> (Updated Aug. 16, 2015, 10:52 a.m.)
> 
> 
> Review request for Ambari, Alejandro Fernandez and Nate Cole.
> 
> 
> Bugs: AMBARI-12778
>     https://issues.apache.org/jira/browse/AMBARI-12778
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> When downgrading a rolling upgrade from HDP 2.3 back to HDP 2.2, all components will fail with a circular symlink reference. 
> 
> The problem is that Ambari changes /etc/component/conf from a directory to a symlink when upgrading to HDP 2.3 from HDP 2.2. During the downgrade, once the component is put back in HDP 2.2, the following is observed:
> ```
> [root@c6401 flume]# ls -l /etc/flume
> total 8
> drwxr-xr-x 3 root  root 4096 Aug 14 15:44 2.3.2.0-2586
> lrwxrwxrwx 1 root  root   34 Aug 14 16:14 conf -> /usr/hdp/current/flume-server/conf
> drwxr-xr-x 2 flume root 4096 Aug 14 15:42 conf.backup
> 
> (/usr/hdp/2.2.7.0-2816/flume/)
> [root@c6401 flume]# ls -l /usr/hdp/current/flume-server/conf
> total 16
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 bin
> lrwxrwxrwx 1 root root   15 Aug 14 15:42 conf -> /etc/flume/conf
> drwxr-xr-x 9 root root 4096 Aug 14 15:42 docs
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 lib
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 tools
> ```
> 
> The solution is to reverse the symlink work done when downgrading from HDP 2.3 back to 2.2.
> 
> 
> Diffs
> -----
> 
>   ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py a676f74 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_handler.py a305ce7 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_upgrade.py 7743619 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/params_linux.py a7efbf6 
>   ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py f868002 
>   ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml f6823c8 
>   ambari-server/src/test/python/custom_actions/test_ru_set_all.py 211443b 
> 
> Diff: https://reviews.apache.org/r/37499/diff/
> 
> 
> Testing
> -------
> 
> Verified fix on a cluster where the problem was reproduced.
> 
> mvn clean test
> ----------------------------------------------------------------------
> Total run:789
> Total errors:0
> Total failures:0
> OK
> 
> 
> Thanks,
> 
> Jonathan Hurley
> 
>


Re: Review Request 37499: RU: Downgrade Fails For All Components From Finalize

Posted by Jonathan Hurley <jh...@hortonworks.com>.

> On Aug. 16, 2015, 1:05 a.m., Alejandro Fernandez wrote:
> > ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py, line 98
> > <https://reviews.apache.org/r/37499/diff/1/?file=1041017#file1041017line98>
> >
> >     Preferable to use the compare_versions function which is easier to find in the future than hardcoding HDP-2.2

I really don't care about the versions here; I care about the stack. It was simple to say source = HDP-2.3 and target = HDP 2.2 ... what's the equivalent code using compare_versions? I'd have to convert the values of `downgrade_from_version` and `version` into normalized versions first, and then compare? Can you give an example?


- Jonathan


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/37499/#review95535
-----------------------------------------------------------


On Aug. 15, 2015, 12:06 a.m., Jonathan Hurley wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/37499/
> -----------------------------------------------------------
> 
> (Updated Aug. 15, 2015, 12:06 a.m.)
> 
> 
> Review request for Ambari, Alejandro Fernandez and Nate Cole.
> 
> 
> Bugs: AMBARI-12778
>     https://issues.apache.org/jira/browse/AMBARI-12778
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> When downgrading a rolling upgrade from HDP 2.3 back to HDP 2.2, all components will fail with a circular symlink reference. 
> 
> The problem is that Ambari changes /etc/component/conf from a directory to a symlink when upgrading to HDP 2.3 from HDP 2.2. During the downgrade, once the component is put back in HDP 2.2, the following is observed:
> ```
> [root@c6401 flume]# ls -l /etc/flume
> total 8
> drwxr-xr-x 3 root  root 4096 Aug 14 15:44 2.3.2.0-2586
> lrwxrwxrwx 1 root  root   34 Aug 14 16:14 conf -> /usr/hdp/current/flume-server/conf
> drwxr-xr-x 2 flume root 4096 Aug 14 15:42 conf.backup
> 
> (/usr/hdp/2.2.7.0-2816/flume/)
> [root@c6401 flume]# ls -l /usr/hdp/current/flume-server/conf
> total 16
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 bin
> lrwxrwxrwx 1 root root   15 Aug 14 15:42 conf -> /etc/flume/conf
> drwxr-xr-x 9 root root 4096 Aug 14 15:42 docs
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 lib
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 tools
> ```
> 
> The solution is to reverse the symlink work done when downgrading from HDP 2.3 back to 2.2.
> 
> 
> Diffs
> -----
> 
>   ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py a676f74 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_handler.py a305ce7 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_upgrade.py 7743619 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/params_linux.py a7efbf6 
>   ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py f868002 
>   ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml f6823c8 
>   ambari-server/src/test/python/custom_actions/test_ru_set_all.py 211443b 
> 
> Diff: https://reviews.apache.org/r/37499/diff/
> 
> 
> Testing
> -------
> 
> Verified fix on a cluster where the problem was reproduced.
> 
> mvn clean test
> ----------------------------------------------------------------------
> Total run:789
> Total errors:0
> Total failures:0
> OK
> 
> 
> Thanks,
> 
> Jonathan Hurley
> 
>


Re: Review Request 37499: RU: Downgrade Fails For All Components From Finalize

Posted by Alejandro Fernandez <af...@hortonworks.com>.

> On Aug. 16, 2015, 5:05 a.m., Alejandro Fernandez wrote:
> > ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py, line 98
> > <https://reviews.apache.org/r/37499/diff/1/?file=1041017#file1041017line98>
> >
> >     Preferable to use the compare_versions function which is easier to find in the future than hardcoding HDP-2.2
> 
> Jonathan Hurley wrote:
>     I really don't care about the versions here; I care about the stack. It was simple to say source = HDP-2.3 and target = HDP 2.2 ... what's the equivalent code using compare_versions? I'd have to convert the values of `downgrade_from_version` and `version` into normalized versions first, and then compare? Can you give an example?

We have a lot of logic that compares the stack against values like 2.2 or 2.3, and it was done because it was easier at the time to keep adding that type of logic. The rest of the scripts use the compare_version function, so I was suggesting being consistent. I'm ok with the current patch.


- Alejandro


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/37499/#review95535
-----------------------------------------------------------


On Aug. 16, 2015, 2:52 p.m., Jonathan Hurley wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/37499/
> -----------------------------------------------------------
> 
> (Updated Aug. 16, 2015, 2:52 p.m.)
> 
> 
> Review request for Ambari, Alejandro Fernandez and Nate Cole.
> 
> 
> Bugs: AMBARI-12778
>     https://issues.apache.org/jira/browse/AMBARI-12778
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> When downgrading a rolling upgrade from HDP 2.3 back to HDP 2.2, all components will fail with a circular symlink reference. 
> 
> The problem is that Ambari changes /etc/component/conf from a directory to a symlink when upgrading to HDP 2.3 from HDP 2.2. During the downgrade, once the component is put back in HDP 2.2, the following is observed:
> ```
> [root@c6401 flume]# ls -l /etc/flume
> total 8
> drwxr-xr-x 3 root  root 4096 Aug 14 15:44 2.3.2.0-2586
> lrwxrwxrwx 1 root  root   34 Aug 14 16:14 conf -> /usr/hdp/current/flume-server/conf
> drwxr-xr-x 2 flume root 4096 Aug 14 15:42 conf.backup
> 
> (/usr/hdp/2.2.7.0-2816/flume/)
> [root@c6401 flume]# ls -l /usr/hdp/current/flume-server/conf
> total 16
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 bin
> lrwxrwxrwx 1 root root   15 Aug 14 15:42 conf -> /etc/flume/conf
> drwxr-xr-x 9 root root 4096 Aug 14 15:42 docs
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 lib
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 tools
> ```
> 
> The solution is to reverse the symlink work done when downgrading from HDP 2.3 back to 2.2.
> 
> 
> Diffs
> -----
> 
>   ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py a676f74 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_handler.py a305ce7 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_upgrade.py 7743619 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/params_linux.py a7efbf6 
>   ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py f868002 
>   ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml f6823c8 
>   ambari-server/src/test/python/custom_actions/test_ru_set_all.py 211443b 
> 
> Diff: https://reviews.apache.org/r/37499/diff/
> 
> 
> Testing
> -------
> 
> Verified fix on a cluster where the problem was reproduced.
> 
> mvn clean test
> ----------------------------------------------------------------------
> Total run:789
> Total errors:0
> Total failures:0
> OK
> 
> 
> Thanks,
> 
> Jonathan Hurley
> 
>


Re: Review Request 37499: RU: Downgrade Fails For All Components From Finalize

Posted by Alejandro Fernandez <af...@hortonworks.com>.
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/37499/#review95535
-----------------------------------------------------------

Ship it!



ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py (line 98)
<https://reviews.apache.org/r/37499/#comment150561>

    Preferable to use the compare_versions function which is easier to find in the future than hardcoding HDP-2.2


- Alejandro Fernandez


On Aug. 15, 2015, 4:06 a.m., Jonathan Hurley wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/37499/
> -----------------------------------------------------------
> 
> (Updated Aug. 15, 2015, 4:06 a.m.)
> 
> 
> Review request for Ambari, Alejandro Fernandez and Nate Cole.
> 
> 
> Bugs: AMBARI-12778
>     https://issues.apache.org/jira/browse/AMBARI-12778
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> When downgrading a rolling upgrade from HDP 2.3 back to HDP 2.2, all components will fail with a circular symlink reference. 
> 
> The problem is that Ambari changes /etc/component/conf from a directory to a symlink when upgrading to HDP 2.3 from HDP 2.2. During the downgrade, once the component is put back in HDP 2.2, the following is observed:
> ```
> [root@c6401 flume]# ls -l /etc/flume
> total 8
> drwxr-xr-x 3 root  root 4096 Aug 14 15:44 2.3.2.0-2586
> lrwxrwxrwx 1 root  root   34 Aug 14 16:14 conf -> /usr/hdp/current/flume-server/conf
> drwxr-xr-x 2 flume root 4096 Aug 14 15:42 conf.backup
> 
> (/usr/hdp/2.2.7.0-2816/flume/)
> [root@c6401 flume]# ls -l /usr/hdp/current/flume-server/conf
> total 16
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 bin
> lrwxrwxrwx 1 root root   15 Aug 14 15:42 conf -> /etc/flume/conf
> drwxr-xr-x 9 root root 4096 Aug 14 15:42 docs
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 lib
> drwxr-xr-x 2 root root 4096 Aug 14 15:42 tools
> ```
> 
> The solution is to reverse the symlink work done when downgrading from HDP 2.3 back to 2.2.
> 
> 
> Diffs
> -----
> 
>   ambari-common/src/main/python/resource_management/libraries/functions/conf_select.py a676f74 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_handler.py a305ce7 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/flume_upgrade.py 7743619 
>   ambari-server/src/main/resources/common-services/FLUME/1.4.0.2.0/package/scripts/params_linux.py a7efbf6 
>   ambari-server/src/main/resources/custom_actions/scripts/ru_set_all.py f868002 
>   ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml f6823c8 
>   ambari-server/src/test/python/custom_actions/test_ru_set_all.py 211443b 
> 
> Diff: https://reviews.apache.org/r/37499/diff/
> 
> 
> Testing
> -------
> 
> Verified fix on a cluster where the problem was reproduced.
> 
> mvn clean test
> ----------------------------------------------------------------------
> Total run:789
> Total errors:0
> Total failures:0
> OK
> 
> 
> Thanks,
> 
> Jonathan Hurley
> 
>