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https://issues.apache.org/jira/browse/FLINK-2180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14617291#comment-14617291
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ASF GitHub Bot commented on FLINK-2180:
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Github user gaborhermann commented on the pull request:
https://github.com/apache/flink/pull/802#issuecomment-119321451
The main purpose of this is to enable a deterministic (non-time based) test
for iteration as it sometimes failed for some reason on Travis. (See [here]
(https://issues.apache.org/jira/browse/FLINK-2180?focusedCommentId=14576968&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14576968)).
I thought it might also be useful to users for debugging purposes (similarly
to maxWaitTime) and it was also easier to introduce it in the API level.
> Streaming iterate test fails spuriously
> ---------------------------------------
>
> Key: FLINK-2180
> URL: https://issues.apache.org/jira/browse/FLINK-2180
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 0.9
> Reporter: Márton Balassi
> Assignee: Gábor Hermann
>
> Following output seen occasionally:
> Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 3.667 sec <<<
> FAILURE! - in org.apache.flink.streaming.api.IterateTest
> test(org.apache.flink.streaming.api.IterateTest) Time elapsed: 3.662 sec
> <<< FAILURE!
> java.lang.AssertionError: null
> at org.junit.Assert.fail(Assert.java:86)
> at org.junit.Assert.assertTrue(Assert.java:41)
> at org.junit.Assert.assertTrue(Assert.java:52)
> at org.apache.flink.streaming.api.IterateTest.test(IterateTest.java:154)
> See: https://travis-ci.org/mbalassi/flink/jobs/65803465
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