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https://issues.apache.org/jira/browse/PIG-1273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12840483#action_12840483
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Ankur commented on PIG-1273:
----------------------------
Complete stack trace of the error thrown my 3rd M/R job in the pipeline
java.lang.RuntimeException: Error in configuring object
at
org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
at
org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
at
org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
at
org.apache.hadoop.mapred.MapTask$OldOutputCollector.(MapTask.java:448)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at org.apache.hadoop.mapred.Child.main(Child.java:159)
Caused by: java.lang.reflect.InvocationTargetException
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.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
... 6 more
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: Empty
samples file
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.partitioners.SkewedPartitioner.configure(SkewedPartitioner.java:128)
... 11 more
Caused by: java.lang.RuntimeException: Empty samples file
at
org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil.loadPartitionFile(MapRedUtil.java:128)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.partitioners.SkewedPartitioner.configure(SkewedPartitioner.java:125)
... 11 more
> Skewed join throws error
> -------------------------
>
> Key: PIG-1273
> URL: https://issues.apache.org/jira/browse/PIG-1273
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.6.0
> Reporter: Ankur
>
> When the sampled relation is too small or empty then skewed join fails.
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