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https://issues.apache.org/jira/browse/APEXCORE-326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15207061#comment-15207061
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ASF GitHub Bot commented on APEXCORE-326:
-----------------------------------------
Github user bhupeshchawda commented on the pull request:
https://github.com/apache/incubator-apex-core/pull/282#issuecomment-199967100
@davidyan74 Please review
> Iteration causes problems when there are multiple streams between two
> operators
> -------------------------------------------------------------------------------
>
> Key: APEXCORE-326
> URL: https://issues.apache.org/jira/browse/APEXCORE-326
> Project: Apache Apex Core
> Issue Type: Bug
> Reporter: Bhupesh Chawda
> Assignee: David Yan
> Attachments: APEXCORE-326.patch
>
>
> Consider the following dag:
> {code:title=Application.java|borderStyle=solid}
> public void populateDAG(DAG dag, Configuration conf)
> {
> SampleInputOperator source = dag.addOperator("Source",
> SampleInputOperator.class);
> SampleOperator op1 = dag.addOperator("Op1", SampleOperator.class);
> SampleOperator op2 = dag.addOperator("Op2", SampleOperator.class);
> DefaultDelayOperator<Integer> delay = dag.addOperator("Delay",
> DefaultDelayOperator.class);
> dag.addStream("Source", source.output, op1.input1);
> dag.addStream("Stream1", op1.output1, op2.input1);
> dag.addStream("Stream2", op1.output2, op2.input2);
> dag.addStream("Op to Delay", op2.delayOutput, delay.input);
> dag.addStream("Delay to Op", delay.output, op1.input2);
> }
> {code}
> This causes the validation to fail causing "Loops in Dag" error message, even
> in the presence of delay operators.
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