[jira] [Resolved] (AMBARI-21346) Unable to Begin An Upgrade Between Stack Versions Due To Assumed Stack Names

["Jonathan Hurley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-21346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Hurley resolved AMBARI-21346.
--------------------------------------
    Resolution: Fixed

> Unable to Begin An Upgrade Between Stack Versions Due To Assumed Stack Names
> ----------------------------------------------------------------------------
>
>                 Key: AMBARI-21346
>                 URL: https://issues.apache.org/jira/browse/AMBARI-21346
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.5.2
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>            Priority: Blocker
>             Fix For: 2.5.2
>
>
> When attempting to begin an upgrade between stack versions from different vendors (ie HDP and BigInsights), various steps will fail because the Ambari Server code assumes that the stack name is not changing. Therefore, actions like finding the right upgrade pack will fail with a NullPointerException
> {code}
> java.lang.NullPointerException
> 	at org.apache.ambari.server.state.UpgradeContext.setSourceAndTargetStacks(UpgradeContext.java:277)
> {code}
> We can work around this temporarily by falling back to querying by the version number directly. 



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