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https://reviews.apache.org/r/37437/
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Review request for Ambari and Alejandro Fernandez.
Bugs: AMBARI-12751
https://issues.apache.org/jira/browse/AMBARI-12751
Repository: ambari
Description
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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.
Diffs
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ambari-server/src/main/resources/stacks/HDP/2.2/upgrades/upgrade-2.3.xml
f6823c8
Diff: https://reviews.apache.org/r/37437/diff/
Testing
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manually patch cluster to run rolling upgrade, after it passes the Core Master
step (which includes upgrading the MapRed2 History server), run downgrade,
verify the MapRed2 history server is still running once the downgrade is done,
the three mapred properties added to satisfy the ru precheck are removed.
Thanks,
Di Li
