[jira] [Commented] (AMBARI-14891) RU/EU should only delete configs on downgrade if source stack matches stack whose status is CURRENT

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-14891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15129688#comment-15129688 ] 

Hadoop QA commented on AMBARI-14891:
------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12785888/AMBARI-14891.trunk.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of javac compiler warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in ambari-server.

Test results: https://builds.apache.org/job/Ambari-trunk-test-patch/5168//testReport/
Console output: https://builds.apache.org/job/Ambari-trunk-test-patch/5168//console

This message is automatically generated.

> RU/EU should only delete configs on downgrade if source stack matches stack whose status is CURRENT
> ---------------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-14891
>                 URL: https://issues.apache.org/jira/browse/AMBARI-14891
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.1.2
>            Reporter: Alejandro Fernandez
>            Assignee: Alejandro Fernandez
>             Fix For: 2.2.2
>
>         Attachments: AMBARI-14891.trunk.patch
>
>
> Saw a case with a customer in which they did the following.
> * Ambari 2.1.2
> * Rolling Upgrade from HDP 2.2 to 2.3.0.0 and skipped the Finalize step, so Ambari never called "Save DB State". Hence, the current stack version was still 2.2. They then modified the host_version and cluster_version records in the DB to mark HDP 2.3 as CURRENT.
> * Forgot to call ambari-server set-current-version
> * Registered and installed bits for HDP 2.3.4.0 and began another RU. After running into an issue, they decided to downgrade, which then completely removed the configs for the target stack (which is HDP 2.3!)
> In order to prevent deleting configs in cases where the user has modified the database, add stronger validation to FinalizeUpgradeAction so that we check that the request's source target stack equals the stack of the repo marked as CURRENT. In this case, they were 2.2 and 2.3, respectively.



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