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https://issues.apache.org/jira/browse/FLINK-2845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14963043#comment-14963043
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Aljoscha Krettek commented on FLINK-2845:
-----------------------------------------
I added more debug output to the failing test so that we can better investigate
it if it occurs again.
> TimestampITCase.testWatermarkPropagation
> ----------------------------------------
>
> Key: FLINK-2845
> URL: https://issues.apache.org/jira/browse/FLINK-2845
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Reporter: Matthias J. Sax
> Assignee: Aljoscha Krettek
> Priority: Critical
> Labels: test-stability
>
> https://travis-ci.org/apache/flink/jobs/84479912
> {noformat}
> Tests run: 8, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 16.592 sec
> <<< FAILURE! - in org.apache.flink.streaming.timestamp.TimestampITCase
> testWatermarkPropagation(org.apache.flink.streaming.timestamp.TimestampITCase)
> Time elapsed: 3.747 sec <<< FAILURE!
> java.lang.AssertionError: Wrong watermark.
> at org.junit.Assert.fail(Assert.java:88)
> at
> org.apache.flink.streaming.timestamp.TimestampITCase.testWatermarkPropagation(TimestampITCase.java:163)
> {noformat}
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