[
https://issues.apache.org/jira/browse/MAPREDUCE-6198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Robert Kanter updated MAPREDUCE-6198:
-------------------------------------
Resolution: Fixed
Fix Version/s: 1.3.0
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Thanks Zhihai. Committed to branch-1!
> NPE from JobTracker#resolveAndAddToTopology in MR1 cause initJob and
> heartbeat failure.
> ---------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6198
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6198
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv1
> Reporter: zhihai xu
> Assignee: zhihai xu
> Fix For: 1.3.0
>
> Attachments: MAPREDUCE-6198.mr1.000.patch
>
>
> NPE from JobTracker#resolveAndAddToTopology in MR1 cause initJob and
> heartbeat failure. The NPE is caused by dnsToSwitchMapping.resolve return
> null at the following:
> {code}
> List <String> rNameList = dnsToSwitchMapping.resolve(tmpList);
> String rName = rNameList.get(0);
> {code}
> I check the code in MR2, MR2 handle it correctly in coreResolve of
> RackResolver.java
> {code}
> List <String> rNameList = dnsToSwitchMapping.resolve(tmpList);
> String rName = null;
> if (rNameList == null || rNameList.get(0) == null) {
> rName = NetworkTopology.DEFAULT_RACK;
> LOG.info("Couldn't resolve " + hostName + ". Falling back to "
> + NetworkTopology.DEFAULT_RACK);
> } else {
> rName = rNameList.get(0);
> LOG.info("Resolved " + hostName + " to " + rName);
> }
> {code}
> We should do the same in MR1, if dnsToSwitchMapping.resolve return null, use
> NetworkTopology.DEFAULT_RACK.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
