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https://issues.apache.org/jira/browse/AMBARI-12949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14876782#comment-14876782
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Hudson commented on AMBARI-12949:
---------------------------------
SUCCESS: Integrated in Ambari-trunk-Commit #3468 (See
[https://builds.apache.org/job/Ambari-trunk-Commit/3468/])
AMBARI-12949 - Downgrade fails with err: 500 status code received on POST
method for API: /api/vi/clusters/mycluster/upgrades (Di Li via jonathanhurley)
(jhurley:
http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=c8595d6e9a60584f371a513c8dd3579a53f66d69)
* ambari-server/src/main/java/org/apache/ambari/server/orm/dao/ClusterDAO.java
*
ambari-server/src/test/java/org/apache/ambari/server/orm/dao/ServiceConfigDAOTest.java
*
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/ClusterConfigEntity.java
*
ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClusterImpl.java
> Downgrade fails with err: 500 status code received on POST method for API:
> /api/vi/clusters/mycluster/upgrades
> --------------------------------------------------------------------------------------------------------------
>
> Key: AMBARI-12949
> URL: https://issues.apache.org/jira/browse/AMBARI-12949
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.1.0
> Reporter: Di Li
> Assignee: Di Li
> Priority: Critical
> Fix For: trunk
>
> Attachments: AMBARI-12949.patch
>
>
> I have a 4 node HDP 2.2 cluster where I created a configuration group to
> apply customized oozie_heap_size to the Oozie server and one of the Oozie
> client. I was able to rolling upgrade the cluster to HDP 2.3, but when I
> clicked Downgrade button on the Finalize step. The Ambari UI immediately
> threw error message "500 status code received on POST method for API:
> /api/vi/clusters/mycluster/upgrades"
> Checking the Ambari server log, it reported a nullpointer error when trying
> to load the designed configurations
> Aug 30, 2015 11:01:07 PM com.sun.jersey.spi.container.ContainerResponse
> mapMappableContainerException
> SEVERE: The RuntimeException could not be mapped to a response, re-throwing
> to the HTTP container
> java.lang.NullPointerException
> at
> org.apache.ambari.server.state.host.HostImpl.getDesiredHostConfigs(HostImpl.java:1349)
> Digging around in the database, I saw that the oozie-env (where I had a
> configuration group) had no version_tag set with "selected" as 1.
> Manually setting the version1 row to have selected = 1, restart server and
> then I was able to run downgrade. However, the downgrade failed to mark
> itself as finished, and my Ambari WEB UI remained in this "Downgrade:Aborted"
> state and I can't restart components anymore (as in most of the UI features
> are disabled as the UI still thinks it's in the middle of an downgrade).
> ambari=> select * from clusterconfigmapping where type_name = 'oozie-env';
> cluster_id | type_name | version_tag | create_timestamp | selected
> | user_name
> ------------+-----------+----------------------+------------------+----------+----------------
> 2 | oozie-env | version1 | 1441033897383 | 0
> | admin
> 2 | oozie-env | version1441037586550 | 1441037586592 | 0
> | ambari-upgrade
> 2 | oozie-env | version1441039514060 | 1441039516239 | 0
> | admin
> (3 rows)
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