Hadoop-Mapreduce-trunk - Build # 1317 - Still Failing

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See https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1317/

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## LAST 60 LINES OF THE CONSOLE 
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[...truncated 29031 lines...]
Running org.apache.hadoop.mapreduce.lib.partition.TestMRKeyFieldBasedPartitioner
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.4 sec
Running org.apache.hadoop.mapreduce.TestChild
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 60.696 sec
Running org.apache.hadoop.mapreduce.filecache.TestURIFragments
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.061 sec
Running org.apache.hadoop.mapreduce.TestMapReduce
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 4.592 sec

Results :

Failed tests:   
testHistoryServerToken(org.apache.hadoop.mapred.TestYARNRunner): null 
expected: but was:null

Tests run: 444, Failures: 1, Errors: 0, Skipped: 12

[INFO] 
[INFO] Reactor Summary:
[INFO] 
[INFO] hadoop-mapreduce-client ... SUCCESS [1.669s]
[INFO] hadoop-mapreduce-client-core .. SUCCESS [20.979s]
[INFO] hadoop-mapreduce-client-common  SUCCESS [23.847s]
[INFO] hadoop-mapreduce-client-shuffle ... SUCCESS [1.639s]
[INFO] hadoop-mapreduce-client-app ... SUCCESS [4:54.599s]
[INFO] hadoop-mapreduce-client-hs  SUCCESS [1:13.625s]
[INFO] hadoop-mapreduce-client-jobclient . FAILURE [42:06.776s]
[INFO] hadoop-mapreduce-client-hs-plugins  SKIPPED
[INFO] Apache Hadoop MapReduce Examples .. SKIPPED
[INFO] hadoop-mapreduce .. SKIPPED
[INFO] 
[INFO] BUILD FAILURE
[INFO] 
[INFO] Total time: 49:03.706s
[INFO] Finished at: Fri Jan 18 14:04:25 UTC 2013
[INFO] Final Memory: 19M/89M
[INFO] 
[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-surefire-plugin:2.12.3:test (default-test) on 
project hadoop-mapreduce-client-jobclient: There are test failures.
[ERROR] 
[ERROR] Please refer to 
/home/jenkins/jenkins-slave/workspace/Hadoop-Mapreduce-trunk/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/target/surefire-reports
 for the individual test results.
[ERROR] - [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e 
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please 
read the following articles:
[ERROR] [Help 1] 
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn goals -rf :hadoop-mapreduce-client-jobclient
Build step 'Execute shell' marked build as failure
[FINDBUGS] Skipping publisher since build result is FAILURE
Archiving artifacts
Updating YARN-331
Updating HDFS-4393
Updating HADOOP-8849
Updating MAPREDUCE-4923
Updating HDFS-4415
Updating YARN-302
Email was triggered for: Failure
Sending email for trigger: Failure



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## FAILED TESTS (if any) 
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No tests ran.

[jira] [Created] (MAPREDUCE-4949) Enable multiple pi jobs to run in parallel

[Sandy Ryza (JIRA)]

Sandy Ryza created MAPREDUCE-4949:
-

 Summary: Enable multiple pi jobs to run in parallel
 Key: MAPREDUCE-4949
 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4949
 Project: Hadoop Map/Reduce
  Issue Type: Improvement
  Components: examples
Affects Versions: 2.0.2-alpha
Reporter: Sandy Ryza
Assignee: Sandy Ryza
Priority: Minor


Currently the hadoop pi example uses a hardcoded temporary directory to store 
its inputs and outputs.  This makes it so that only one pi job can run at a 
time, and that if it is cancelled, the temporary directory must be manually 
deleted.

I propose using a temporary directory based on a timestamp and random number to 
avoid these conflicts

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