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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2662) CompilerException: "Bug: Plan generation for Unions picked a ship strategy between binary plan operators."
Date Fri, 16 Sep 2016 22:20:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15497564#comment-15497564

ASF GitHub Bot commented on FLINK-2662:

GitHub user fhueske opened a pull request:


    [FLINK-2662] [dataSet] Translate union with multiple output into separate unions with
single output.

    Fixes FLINK-2662 by translating Union operators with two (or more) successors into two
or more Union operators with a single successor.
    In the optimizer union operators with two (or more) successors caused problems, when these
successors had different partitioning requirements and some of these successors were other
Union operators. In certain situations, the UnionMerging post pass would fail because of a
non-forward shipping strategy between two subsequent union operators.
    This fix does only adapt the program translation and does not change the API.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/fhueske/flink FLINK-2662

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2508
commit 8d91e9d0074884ac430c88c4f6ad41878a8d1dff
Author: Fabian Hueske <fhueske@apache.org>
Date:   2016-09-16T16:40:32Z

    [FLINK-2662] [dataSet] Translate union with multiple output into separate unions with
single output.


> CompilerException: "Bug: Plan generation for Unions picked a ship strategy between binary
plan operators."
> ----------------------------------------------------------------------------------------------------------
>                 Key: FLINK-2662
>                 URL: https://issues.apache.org/jira/browse/FLINK-2662
>             Project: Flink
>          Issue Type: Bug
>          Components: Optimizer
>    Affects Versions: 0.9.1, 0.10.0
>            Reporter: Gabor Gevay
>            Priority: Critical
>             Fix For: 1.0.0
>         Attachments: FlinkBug.scala
> I have a Flink program which throws the exception in the jira title. Full text:
> Exception in thread "main" org.apache.flink.optimizer.CompilerException: Bug: Plan generation
for Unions picked a ship strategy between binary plan operators.
> 	at org.apache.flink.optimizer.traversals.BinaryUnionReplacer.collect(BinaryUnionReplacer.java:113)
> 	at org.apache.flink.optimizer.traversals.BinaryUnionReplacer.postVisit(BinaryUnionReplacer.java:72)
> 	at org.apache.flink.optimizer.traversals.BinaryUnionReplacer.postVisit(BinaryUnionReplacer.java:41)
> 	at org.apache.flink.optimizer.plan.DualInputPlanNode.accept(DualInputPlanNode.java:170)
> 	at org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:199)
> 	at org.apache.flink.optimizer.plan.DualInputPlanNode.accept(DualInputPlanNode.java:163)
> 	at org.apache.flink.optimizer.plan.DualInputPlanNode.accept(DualInputPlanNode.java:163)
> 	at org.apache.flink.optimizer.plan.WorksetIterationPlanNode.acceptForStepFunction(WorksetIterationPlanNode.java:194)
> 	at org.apache.flink.optimizer.traversals.BinaryUnionReplacer.preVisit(BinaryUnionReplacer.java:49)
> 	at org.apache.flink.optimizer.traversals.BinaryUnionReplacer.preVisit(BinaryUnionReplacer.java:41)
> 	at org.apache.flink.optimizer.plan.DualInputPlanNode.accept(DualInputPlanNode.java:162)
> 	at org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:199)
> 	at org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:199)
> 	at org.apache.flink.optimizer.plan.OptimizedPlan.accept(OptimizedPlan.java:127)
> 	at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:520)
> 	at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:402)
> 	at org.apache.flink.client.LocalExecutor.getOptimizerPlanAsJSON(LocalExecutor.java:202)
> 	at org.apache.flink.api.java.LocalEnvironment.getExecutionPlan(LocalEnvironment.java:63)
> 	at malom.Solver.main(Solver.java:66)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:497)
> 	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
> The execution plan:
> http://compalg.inf.elte.hu/~ggevay/flink/plan_3_4_0_0_without_verif.txt
> (I obtained this by commenting out the line that throws the exception)
> The code is here:
> https://github.com/ggevay/flink/tree/plan-generation-bug
> The class to run is "Solver". It needs a command line argument, which is a directory
where it would write output. (On first run, it generates some lookuptables for a few minutes,
which are then placed to /tmp/movegen)

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