[MAPREDUCE-1880] "java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result." while running "hadoop jar hadoop-0.20.1+169.89-examples.jar pi 4 30"

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.20.1
• Fix Version/s: 0.20.3, 0.21.0, 0.22.0
• Component/s: examples
• Labels: pi_example ubuntu_lucid

Environment

ubuntu 10.04 lucid
sun jdk 6
hadoop packaged by cloudera

• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Victor Pakhomov
• Created: 19/Jun/10 20:03
• Updated: 24/Aug/10 21:21
• Resolved: 22/Jun/10 03:33

Description

If I run "hadoop jar hadoop-0.20.1+169.89-examples.jar pi 4 30", I get the following output:

Number of Maps = 4
Samples per Map = 30
Wrote input for Map #0
Wrote input for Map #1
Wrote input for Map #2
Wrote input for Map #3
Starting Job
10/06/19 21:50:34 INFO mapred.FileInputFormat: Total input paths to process : 4
10/06/19 21:50:34 INFO mapred.JobClient: Running job: job_201006192101_0003
10/06/19 21:50:35 INFO mapred.JobClient: map 0% reduce 0%
10/06/19 21:50:45 INFO mapred.JobClient: map 50% reduce 0%
10/06/19 21:50:51 INFO mapred.JobClient: map 100% reduce 0%
10/06/19 21:51:00 INFO mapred.JobClient: map 100% reduce 100%
10/06/19 21:51:02 INFO mapred.JobClient: Job complete: job_201006192101_0003
10/06/19 21:51:02 INFO mapred.JobClient: Counters: 18
10/06/19 21:51:02 INFO mapred.JobClient: Job Counters
10/06/19 21:51:02 INFO mapred.JobClient: Launched reduce tasks=1
10/06/19 21:51:02 INFO mapred.JobClient: Launched map tasks=4
10/06/19 21:51:02 INFO mapred.JobClient: Data-local map tasks=4
10/06/19 21:51:02 INFO mapred.JobClient: FileSystemCounters
10/06/19 21:51:02 INFO mapred.JobClient: FILE_BYTES_READ=94
10/06/19 21:51:02 INFO mapred.JobClient: HDFS_BYTES_READ=472
10/06/19 21:51:02 INFO mapred.JobClient: FILE_BYTES_WRITTEN=334
10/06/19 21:51:02 INFO mapred.JobClient: HDFS_BYTES_WRITTEN=215
10/06/19 21:51:02 INFO mapred.JobClient: Map-Reduce Framework
10/06/19 21:51:02 INFO mapred.JobClient: Reduce input groups=8
10/06/19 21:51:02 INFO mapred.JobClient: Combine output records=0
10/06/19 21:51:02 INFO mapred.JobClient: Map input records=4
10/06/19 21:51:02 INFO mapred.JobClient: Reduce shuffle bytes=112
10/06/19 21:51:02 INFO mapred.JobClient: Reduce output records=0
10/06/19 21:51:02 INFO mapred.JobClient: Spilled Records=16
10/06/19 21:51:02 INFO mapred.JobClient: Map output bytes=72
10/06/19 21:51:02 INFO mapred.JobClient: Map input bytes=96
10/06/19 21:51:02 INFO mapred.JobClient: Combine input records=0
10/06/19 21:51:02 INFO mapred.JobClient: Map output records=8
10/06/19 21:51:02 INFO mapred.JobClient: Reduce input records=8
Job Finished in 28.593 seconds
java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.
at java.math.BigDecimal.divide(BigDecimal.java:1603)
at org.apache.hadoop.examples.PiEstimator.estimate(PiEstimator.java:313)
at org.apache.hadoop.examples.PiEstimator.run(PiEstimator.java:342)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.examples.PiEstimator.main(PiEstimator.java:351)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:156)

"hadoop jar hadoop-0.20.1+169.89-examples.jar pi 2 10" finishes fine