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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 updated AMBARI-12751:
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Component/s: ambari-server
> 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
>
> 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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