[jira] [Reopened] (FLINK-7685) CompilerException: "Bug: Logic for branching plans (non-tree plans) has an error, and does not track the re-joining of branches correctly"

["Konstantin Knauf (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-7685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Knauf reopened FLINK-7685:
-------------------------------------

Re-opening in accordance with https://issues.apache.org/jira/browse/FLINK-23206.

> CompilerException: "Bug: Logic for branching plans (non-tree plans) has an error, and does not track the re-joining of branches correctly"
> ------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-7685
>                 URL: https://issues.apache.org/jira/browse/FLINK-7685
>             Project: Flink
>          Issue Type: Bug
>          Components: API / DataSet
>            Reporter: Gábor Gévay
>            Priority: Minor
>              Labels: auto-closed
>
> A Flink program which reads an input DataSet, creates 64 new DataSets from it, and writes these to separate files throws the following exception:
> {code:java}
> Exception in thread "main" org.apache.flink.optimizer.CompilerException: Bug: Logic for branching plans (non-tree plans) has an error, and does not track the re-joining of branches correctly.
> 	at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:491)
> 	at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:398)
> 	at org.apache.flink.client.LocalExecutor.executePlan(LocalExecutor.java:187)
> 	at org.apache.flink.api.java.LocalEnvironment.execute(LocalEnvironment.java:91)
> 	at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:921)
> 	at org.apache.flink.examples.java.wordcount.WordCount.main(WordCount.java:86)
> {code}
> Here is some code that reproduces it:
> https://github.com/ggevay/flink/tree/compiler-exception-new
> Note that it works with less than 64 DataSets.
> Also note that with more than 64 DataSets it throws {{CompilerException: Cannot currently handle nodes with more than 64 outputs}}, which is at least a clear error msg that helps the user to find a workaround.



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