[jira] Created: (MAPREDUCE-2016) GridMix throws an ArithmeticException error when tasktracker count is zero while generating the data.

["Vinay Kumar Thota (JIRA)" <ji...@apache.org>]

GridMix throws an ArithmeticException error when tasktracker count is zero while generating the data.
-----------------------------------------------------------------------------------------------------

                 Key: MAPREDUCE-2016
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2016
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/gridmix
    Affects Versions: 0.20.1
            Reporter: Vinay Kumar Thota
            Assignee: Ranjit Mathew


GridMix throws an ArithmeticException error when tasktracker count is zero. In generating data, while calculating the bytes per task tracker in getSplit method, throws an exception if tasktracker count is zero. Actually bytes are calculating by dividing the number of task trackers in the cluster. So we need to build the better exception handling for these kinds of cases. Should add a condition (count should be >0) for tasktracker count before calculating the bytes per tasktracker. 

10/08/12 08:33:34 INFO gridmix.JobSubmitter:  Job org.apache.hadoop.mapreduce.Job@18a8ce2 submission failed 
java.lang.ArithmeticException: / by zero
        at org.apache.hadoop.mapred.gridmix.GenerateData$GenDataFormat.getSplits(GenerateData.java:161)
        at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:902)
        at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:919)
        at org.apache.hadoop.mapred.JobClient.access$5(JobClient.java:913)
        at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:838)
        at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:1)
        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:1021)
        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:792)
        at org.apache.hadoop.mapreduce.Job.submit(Job.java:465)
        at org.apache.hadoop.mapred.gridmix.GenerateData$1.run(GenerateData.java:116)
        at org.apache.hadoop.mapred.gridmix.GenerateData$1.run(GenerateData.java:101)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1021)
        at org.apache.hadoop.mapred.gridmix.GenerateData.call(GenerateData.java:101)
        at org.apache.hadoop.mapred.gridmix.GenerateData.call(GenerateData.java:57)
        at org.apache.hadoop.mapred.gridmix.JobSubmitter$SubmitTask.run(JobSubmitter.java:106)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)


-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.