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https://issues.apache.org/jira/browse/FLINK-1587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14344831#comment-14344831
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ASF GitHub Bot commented on FLINK-1587:
---------------------------------------
Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/440#issuecomment-76914047
The failure in TaskManagerFailsITCase should be unrelated to your PR. This
should be fixed once the proper shading is in place. So don't worry and go
ahead merging it.
On Mon, Mar 2, 2015 at 8:55 PM, Vasia Kalavri <notificati...@github.com>
wrote:
> There is a failure in TaskManagerFailsITCase for Hadoop 2.0.0-alpha on
> travis.
> Is this fixed or something I can ignore and go ahead and merge this one?
> :))
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/apache/flink/pull/440#issuecomment-76799370>.
>
> coGroup throws NoSuchElementException on iterator.next()
> --------------------------------------------------------
>
> Key: FLINK-1587
> URL: https://issues.apache.org/jira/browse/FLINK-1587
> Project: Flink
> Issue Type: Bug
> Components: Gelly
> Environment: flink-0.8.0-SNAPSHOT
> Reporter: Carsten Brandt
> Assignee: Andra Lungu
>
> I am receiving the following exception when running a simple job that
> extracts outdegree from a graph using Gelly. It is currently only failing on
> the cluster and I am not able to reproduce it locally. Will try that the next
> days.
> {noformat}
> 02/20/2015 02:27:02: CoGroup (CoGroup at inDegrees(Graph.java:675)) (5/64)
> switched to FAILED
> java.util.NoSuchElementException
> at java.util.Collections$EmptyIterator.next(Collections.java:3006)
> at flink.graphs.Graph$CountNeighborsCoGroup.coGroup(Graph.java:665)
> at
> org.apache.flink.runtime.operators.CoGroupDriver.run(CoGroupDriver.java:130)
> at
> org.apache.flink.runtime.operators.RegularPactTask.run(RegularPactTask.java:493)
> at
> org.apache.flink.runtime.operators.RegularPactTask.invoke(RegularPactTask.java:360)
> at
> org.apache.flink.runtime.execution.RuntimeEnvironment.run(RuntimeEnvironment.java:257)
> at java.lang.Thread.run(Thread.java:745)
> 02/20/2015 02:27:02: Job execution switched to status FAILING
> ...
> {noformat}
> The error occurs in Gellys Graph.java at this line:
> https://github.com/apache/flink/blob/a51c02f6e8be948d71a00c492808115d622379a7/flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/Graph.java#L636
> Is there any valid case where a coGroup Iterator may be empty? As far as I
> see there is a bug somewhere.
> I'd like to write a test case for this to reproduce the issue. Where can I
> put such a test?
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