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https://issues.apache.org/jira/browse/AMBARI-7835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14176069#comment-14176069
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Robert Nettleton commented on AMBARI-7835:
------------------------------------------
I cannot reproduce the unit test failure that was reported by the automated
suite.
I have rebased my changes to the latest "trunk" code, and was able to
successfully run the full ambari-server build and unit test suite, without any
failures.
Not sure if it is necessary, but I've uploaded the second version of my patch,
built against the latest trunk code as of today.
> Blueprints exports fail after an upgrade from Ambari 1.6 to 1.7.0
> -----------------------------------------------------------------
>
> Key: AMBARI-7835
> URL: https://issues.apache.org/jira/browse/AMBARI-7835
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 1.7.0
> Reporter: Robert Nettleton
> Assignee: Robert Nettleton
> Fix For: 1.7.0
>
> Attachments: AMBARI-7835.patch.2, AMBARI-7835_1.7.0.patch
>
>
> Exporting a Blueprint from a running cluster after an upgrade from Ambari 1.6
> to 1.7.0 currently fails.
> The REST API reports a server failure, and the ambari-server.log indicates
> that a NullPointerException occurs:
> java.lang.NullPointerException
> at
> org.apache.ambari.server.api.query.render.ClusterBlueprintRenderer$Configuration.stripRequiredProperties(ClusterBlueprintRenderer.java:594)
> at
> org.apache.ambari.server.api.query.render.ClusterBlueprintRenderer$Configuration.<init>(ClusterBlueprintRenderer.java:541)
> at
> org.apache.ambari.server.api.query.render.ClusterBlueprintRenderer.processConfigurations(ClusterBlueprintRenderer.java:210)
> at
> org.apache.ambari.server.api.query.render.ClusterBlueprintRenderer.createBlueprintResource(ClusterBlueprintRenderer.java:158)
> at
> org.apache.ambari.server.api.query.render.ClusterBlueprintRenderer.finalizeResult(ClusterBlueprintRenderer.java:120)
> at
> org.apache.ambari.server.api.query.QueryImpl.getResult(QueryImpl.java:731)
> at
> org.apache.ambari.server.api.query.QueryImpl.execute(QueryImpl.java:197)
> at
> org.apache.ambari.server.api.handlers.ReadHandler.handleRequest(ReadHandler.java:68)
> at
> org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:135)
> at
> org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:103)
> at
> org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:72)
> at
> org.apache.ambari.server.api.services.ClusterService.getCluster(ClusterService.java:81)
> This exception only seems to occur in the following scenario:
> 1. Install Ambari 1.6
> 2. Start an HDP cluster (2.1, others may also cause this) using the Ambari
> UI.
> 3. Upgrade Ambari to v1.7.0.
> 4. Attempt to export a Blueprint based on the cluster, and this will cause
> the exception.
> The Blueprint configuration processor is currently failing to process certain
> "emtpy" configuration elements that the Ambari UI adds in Ambari 1.6 but does
> not add in newer versions of the code.
> The Blueprint configuration processor should be updated to handle empty
> configuration groups, which are valid in Ambari.
> I'm working on a fix for this, and will be submitting a patch shortly.
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