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From Vinod Gupta Tankala <tvi...@readypulse.com>
Subject mapred example task failing with error 127
Date Thu, 29 Sep 2011 22:57:14 GMT
I just setup a pseudo-distributed hadoop setup. but when i run the example
task, i get failed child error. I see that this was posted earlier as well
but I didn't see the resolution.

http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201108.mbox/%3CC30BF131A023EA4D976727CD4FC563FE0AFBEB4E@CORP-MSG-01.pfshq.com%3E

this is happening on a ec2 linux instance. here are the details -

11/09/29 22:41:02 INFO mapred.FileInputFormat: Total input paths to process
: 15
11/09/29 22:41:04 INFO mapred.JobClient: Running job: job_201109292240_0001
11/09/29 22:41:05 INFO mapred.JobClient:  map 0% reduce 0%
11/09/29 22:41:13 INFO mapred.JobClient: Task Id :
attempt_201109292240_0001_m_000016_0, Status : FAILED
java.lang.Throwable: Child Error
        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
Caused by: java.io.IOException: Task process exit with nonzero status of
127.
        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)

11/09/29 22:41:13 WARN mapred.JobClient: Error reading task
outputhttp://ip-10-32-61-60.ec2.internal:50060/tasklog?plaintext=true&attemptid=attempt_201109292240_0001_m_000016_0&filter=stdout
11/09/29 22:41:13 WARN mapred.JobClient: Error reading task
outputhttp://ip-10-32-61-60.ec2.internal:50060/tasklog?plaintext=true&attemptid=attempt_201109292240_0001_m_000016_0&filter=stderr
11/09/29 22:41:19 INFO mapred.JobClient: Task Id :
attempt_201109292240_0001_m_000016_1, Status : FAILED
....
11/09/29 22:41:55 INFO mapred.JobClient: Job complete: job_201109292240_0001
11/09/29 22:41:55 INFO mapred.JobClient: Counters: 4
11/09/29 22:41:55 INFO mapred.JobClient:   Job Counters
11/09/29 22:41:55 INFO mapred.JobClient:     SLOTS_MILLIS_MAPS=24566
11/09/29 22:41:55 INFO mapred.JobClient:     Total time spent by all reduces
waiting after reserving slots (ms)=0
11/09/29 22:41:55 INFO mapred.JobClient:     Total time spent by all maps
waiting after reserving slots (ms)=0
11/09/29 22:41:55 INFO mapred.JobClient:     SLOTS_MILLIS_REDUCES=0
11/09/29 22:41:55 INFO mapred.JobClient: Job Failed: NA
java.io.IOException: Job failed!
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1204)
        at org.apache.hadoop.examples.Grep.run(Grep.java:69)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.examples.Grep.main(Grep.java:93)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at
org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
        at
org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
        at
org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)


thanks
vinod

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