[jira] [Assigned] (PIG-3726) Ranking empty records leads to NullPointerException

["Jarek Jarcec Cecho (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-3726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jarek Jarcec Cecho reassigned PIG-3726:
---------------------------------------

    Assignee: Jarek Jarcec Cecho

> Ranking empty records leads to NullPointerException
> ---------------------------------------------------
>
>                 Key: PIG-3726
>                 URL: https://issues.apache.org/jira/browse/PIG-3726
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.12.0
>            Reporter: Mykhaylo Telizhyn
>            Assignee: Jarek Jarcec Cecho
>             Fix For: 0.13.0
>
>         Attachments: PIG-3726.patch, PIG-3726.patch, emptyRecordsNPE.patch
>
>
> steps to reproduce:
> 1) create an empty file on hdfs (e.g. /user/root/test/empty.txt)
> 2) execute the following pig script:
> records = LOAD '/user/root/test/empty.txt' AS (Amount: DOUBLE);
> ranked = RANK records BY Amount DESC;
> DUMP ranked;
> 3) on console you will get " ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2043: Unexpected error during execution." and in pig's logs you will see:
> Pig Stack Trace
> {code}
> ---------------
> ERROR 2043: Unexpected error during execution.
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open iterator for alias ranked
> at org.apache.pig.PigServer.openIterator(PigServer.java:880)
> at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:774)
> at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:372)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:198)
> at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:173)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:84)
> at org.apache.pig.Main.run(Main.java:607)
> at org.apache.pig.Main.main(Main.java:156)
> 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:212)
> Caused by: org.apache.pig.PigException: ERROR 1002: Unable to store alias ranked
> at org.apache.pig.PigServer.storeEx(PigServer.java:982)
> at org.apache.pig.PigServer.store(PigServer.java:942)
> at org.apache.pig.PigServer.openIterator(PigServer.java:855)
> ... 12 more
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2043: Unexpected error during execution.
> at org.apache.pig.PigServer.launchPlan(PigServer.java:1333)
> at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1307)
> at org.apache.pig.PigServer.storeEx(PigServer.java:978)
> ... 14 more
> Caused by: java.lang.RuntimeException: Error to read counters into Rank operation counterSize 0
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.saveCounters(JobControlCompiler.java:386)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.updateMROpPlan(JobControlCompiler.java:332)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:387)
> at org.apache.pig.PigServer.launchPlan(PigServer.java:1322)
> ... 16 more
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.mapreduce.counters.Limits.filterName(Limits.java:44)
> at org.apache.hadoop.mapreduce.counters.Limits.filterGroupName(Limits.java:52)
> at org.apache.hadoop.mapreduce.counters.AbstractCounters.getGroup(AbstractCounters.java:220)
> at org.apache.hadoop.mapred.Counters.getGroup(Counters.java:113)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.saveCounters(JobControlCompiler.java:360)
> ... 19 more
> ================================================================================
> {code}



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