Gabor Gevay created FLINK-7685:
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Summary: 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: Optimizer
Reporter: Gabor Gevay
Priority: Minor
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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