NPE in FileOutputCommitter when running a 0 reduce job
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Key: MAPREDUCE-3808
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3808
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 0.23.0
Reporter: Siddharth Seth
Priority: Blocker
This was while running LoadGen.
{noformat}
Error: java.lang.NullPointerException at
org.apache.hadoop.fs.Path.<init>(Path.java:67)
at org.apache.hadoop.fs.Path.<init>(Path.java:56)
at
org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getPendingJobAttemptsPath(FileOutputCommitter.java:118)
at
org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getJobAttemptPath(FileOutputCommitter.java:167)
at
org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getJobAttemptPath(FileOutputCommitter.java:149)
at
org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getPendingTaskAttemptsPath(FileOutputCommitter.java:185)
at
org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getTaskAttemptPath(FileOutputCommitter.java:209)
at
org.apache.hadoop.mapred.FileOutputCommitter.getTaskAttemptPath(FileOutputCommitter.java:100)
at
org.apache.hadoop.mapred.FileOutputCommitter.getTaskAttemptPath(FileOutputCommitter.java:94)
at
org.apache.hadoop.mapred.FileOutputCommitter.needsTaskCommit(FileOutputCommitter.java:176)
at
org.apache.hadoop.mapred.OutputCommitter.needsTaskCommit(OutputCommitter.java:248)
at org.apache.hadoop.mapred.Task.isCommitRequired(Task.java:955)
at org.apache.hadoop.mapred.Task.done(Task.java:912)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:331)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:147)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:142)
{noformat}
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