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https://issues.apache.org/jira/browse/PIG-1651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12915959#action_12915959
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Daniel Dai commented on PIG-1651:
---------------------------------
+1
> PIG class loading mishandled
> ----------------------------
>
> Key: PIG-1651
> URL: https://issues.apache.org/jira/browse/PIG-1651
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.0
> Reporter: Yan Zhou
> Assignee: Richard Ding
> Fix For: 0.8.0
>
> Attachments: PIG-1651.patch
>
>
> If just having zebra.jar as being registered in a PIG script but not in the
> CLASSPATH, the query using zebra fails since there appear to be multiple
> classes loaded into JVM, causing static variable set previously not seen
> after one instance of the class is created through reflection. (After the
> zebra.jar is specified in CLASSPATH, it works fine.) The exception stack is
> as follows:
> ackend error message during job submission
> -------------------------------------------
> org.apache.pig.backend.executionengine.ExecException: ERROR 2118: Unable to
> create input splits for: hdfs://hostname/pathto/zebra_dir :: null
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:284)
> at
> org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:907)
> at
> org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:801)
> at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:752)
> at org.apache.hadoop.mapred.jobcontrol.Job.submit(Job.java:378)
> at
> org.apache.hadoop.mapred.jobcontrol.JobControl.startReadyJobs(JobControl.java:247)
> at
> org.apache.hadoop.mapred.jobcontrol.JobControl.run(JobControl.java:279)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.zebra.io.ColumnGroup.getNonDataFilePrefix(ColumnGroup.java:123)
> at
> org.apache.hadoop.zebra.io.ColumnGroup$CGPathFilter.accept(ColumnGroup.java:2413)
> at
> org.apache.hadoop.zebra.mapreduce.TableInputFormat$DummyFileInputFormat$MultiPathFilter.accept(TableInputFormat.java:718)
> at
> org.apache.hadoop.fs.FileSystem$GlobFilter.accept(FileSystem.java:1084)
> at
> org.apache.hadoop.fs.FileSystem.globStatusInternal(FileSystem.java:919)
> at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:866)
> at
> org.apache.hadoop.zebra.mapreduce.TableInputFormat$DummyFileInputFormat.listStatus(TableInputFormat.java:780)
> at
> org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:246)
> at
> org.apache.hadoop.zebra.mapreduce.TableInputFormat.getRowSplits(TableInputFormat.java:863)
> at
> org.apache.hadoop.zebra.mapreduce.TableInputFormat.getSplits(TableInputFormat.java:1017)
> at
> org.apache.hadoop.zebra.mapreduce.TableInputFormat.getSplits(TableInputFormat.java:961)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:269)
> ... 7 more
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