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https://issues.apache.org/jira/browse/AMBARI-12751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Di Li resolved AMBARI-12751.
----------------------------
Resolution: Invalid
The tests done to reproduce the err were base on the assumption that HDP 2.2 to
HDP 2.3 RU needed to have the three mapred properties configured.
They properties, based on the latest tests, were for HDP 2.3 only (as indicated
by the minimum version defined in the
"MapReduce2JobHistoryStatePreservingCheck" class on the server side.
The changes proposed in this review is not needed for the HDP 2.2 to HDP 2.3 RU.
> MapRed history server is shown as stopped after downgrade
> ---------------------------------------------------------
>
> Key: AMBARI-12751
> URL: https://issues.apache.org/jira/browse/AMBARI-12751
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.1.0
> Reporter: Di Li
> Assignee: Di Li
> Fix For: 2.1.2
>
> Attachments: AMBARI-12751.patch
>
>
> RU precheck requires "mapreduce.jobhistory.recovery.store.class" property to
> be set in the mapred-site.xml with value
> "org.apache.hadoop.mapreduce.v2.hs.HistoryServerLeveldbStateStoreService"
> With this value set, the HDP 2.2 level MapRed history server can not start.
> It shows an err about class
> org.apache.hadoop.mapreduce.v2.hs.HistoryServerLeveldbStateStoreService does
> not exist.
> When downgrading, the mapred properties added to pass the RU precheck needs
> to be removed.
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