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https://issues.apache.org/jira/browse/MAPREDUCE-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Allen Wittenauer resolved MAPREDUCE-1724.
-----------------------------------------
Resolution: Fixed
Stale? Probably? Hopefully.
> JobTracker balks at empty String for locations
> ----------------------------------------------
>
> Key: MAPREDUCE-1724
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1724
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Affects Versions: 0.20.1
> Environment: CDH 2 hadoop-0.20.1+169.68
> Reporter: Craig Macdonald
> Priority: Minor
>
> If a split has locations which are "" (empty String), then the JobTracker
> will get upset during initialization:
> 2010-04-22 19:09:20,395 ERROR org.apache.hadoop.mapred.JobTracker: Job
> initialization failed:
> java.lang.StringIndexOutOfBoundsException: String index out of range: 0
> at java.lang.String.charAt(String.java:687)
> at org.apache.hadoop.net.NetUtils.normalizeHostName(NetUtils.java:420)
> at
> org.apache.hadoop.net.NetUtils.normalizeHostNames(NetUtils.java:443)
> at
> org.apache.hadoop.net.CachedDNSToSwitchMapping.resolve(CachedDNSToSwitchMapping.java:42)
> at
> org.apache.hadoop.mapred.JobTracker.resolveAndAddToTopology(JobTracker.java:2411)
> at
> org.apache.hadoop.mapred.JobInProgress.createCache(JobInProgress.java:360)
> at
> org.apache.hadoop.mapred.JobInProgress.initTasks(JobInProgress.java:462)
> at org.apache.hadoop.mapred.JobTracker.initJob(JobTracker.java:3183)
> at
> org.apache.hadoop.mapred.EagerTaskInitializationListener$InitJob.run(EagerTaskInitializationListener.java:79)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:637)
> Two key points:
> * This is different from Hadoop 0.18
> * CombineFileSplit has a constructor where String[] location is not
> specified, and hence the location array is populated with empty Strings.
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