[jira] [Updated] (PIG-4343) Tez auto parallelism fails at query compile time

["Daniel Dai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Dai updated PIG-4343:
----------------------------
    Issue Type: Bug  (was: Sub-task)
        Parent:     (was: PIG-3446)

> Tez auto parallelism fails at query compile time
> ------------------------------------------------
>
>                 Key: PIG-4343
>                 URL: https://issues.apache.org/jira/browse/PIG-4343
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.14.0
>            Reporter: Cheolsoo Park
>
> I was running some legacy MR jobs in Tez mode to do perf benchmarks. But when {{pig.tez.auto.parallelism}} is enabled (by default), Pig fails with the following error-
> {code}
> org.apache.pig.impl.plan.VisitorException: ERROR 0: java.io.IOException: Cannot estimate parallelism for scope-892, effective parallelism for predecessor scope-892 is -1
>     at org.apache.pig.backend.hadoop.executionengine.tez.plan.optimizer.ParallelismSetter.visitTezOp(ParallelismSetter.java:189)
>     at org.apache.pig.backend.hadoop.executionengine.tez.plan.TezOperator.visit(TezOperator.java:232)
>     at org.apache.pig.backend.hadoop.executionengine.tez.plan.TezOperator.visit(TezOperator.java:49)
>     at org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:70)
>     at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:46)
>     at org.apache.pig.backend.hadoop.executionengine.tez.TezLauncher.processLoadAndParallelism(TezLauncher.java:429)
>     at org.apache.pig.backend.hadoop.executionengine.tez.TezLauncher.launchPig(TezLauncher.java:143)
>     at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.launchPig(HExecutionEngine.java:301)
>     at org.apache.pig.PigServer.launchPlan(PigServer.java:1390)
>     at org.apache.pig.LipstickPigServer.launchPlan(LipstickPigServer.java:151)
>     at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1375)
>     at org.apache.pig.PigServer.execute(PigServer.java:1364)
>     at org.apache.pig.PigServer.executeBatch(PigServer.java:415)
>     at org.apache.pig.PigServer.executeBatch(PigServer.java:398)
>     at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:171)
>     at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:234)
>     at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:205)
>     at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81)
>     at com.netflix.lipstick.Main.run(Main.java:496)
>     at com.netflix.lipstick.Main.main(Main.java:171)
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>     at java.lang.reflect.Method.invoke(Method.java:606)
>     at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
> Caused by: java.io.IOException: Cannot estimate parallelism for scope-892, effective parallelism for predecessor scope-892 is -1
>     at org.apache.pig.backend.hadoop.executionengine.tez.plan.optimizer.TezOperDependencyParallelismEstimator.estimateParallelism(TezOperDependencyParallelismEstimator.java:116)
>     at org.apache.pig.backend.hadoop.executionengine.tez.plan.optimizer.ParallelismSetter.visitTezOp(ParallelismSetter.java:134)
>     ... 24 more
> {code}



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