[AMBARI-12751] MapRed history server is shown as stopped after downgrade

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.1.0
• Fix Version/s: 2.1.2
• Component/s: ambari-server
• Assignee: Di Li
• Reporter: Di Li
• Created: 12/Aug/15 18:07
• Updated: 18/Aug/15 15:14
• Resolved: 18/Aug/15 15:14

Description

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.