[ 
https://issues.apache.org/jira/browse/FLINK-1233?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Stephan Ewen resolved FLINK-1233.
---------------------------------
    Resolution: Fixed

Fixed via 8a955e51959fbf3a3028496f809f89b60c4e7945

> Flaky Test AggregateITCase
> --------------------------
>
>                 Key: FLINK-1233
>                 URL: https://issues.apache.org/jira/browse/FLINK-1233
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Runtime
>    Affects Versions: 0.8-incubating
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>             Fix For: 0.8-incubating
>
>
> The test seems to trigger a race condition in the scheduler.
> My first guess is that it is the structure of the job that frees slots from 
> the slot sharing group (when the final aggregation is running with 
> parallelism 1) and then tries to add slots to that sharing group again from 
> unoccupied slots.
> {code}
> java.lang.Exception: Cannot schedule the receivers, not enough resources
>       at 
> org.apache.flink.runtime.executiongraph.ExecutionGraph.lookupConnectionInfoAndDeployReceivers(ExecutionGraph.java:591)
>       at 
> org.apache.flink.runtime.jobmanager.JobManager.lookupConnectionInfo(JobManager.java:558)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:622)
>       at org.apache.flink.runtime.ipc.RPC$Server.call(RPC.java:420)
>       at org.apache.flink.runtime.ipc.Server$Handler.run(Server.java:947)
> Caused by: 
> org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: 
> Not enough free slots available to run the job. You can decrease the operator 
> parallelism or increase the number of slots per TaskManager in the 
> configuration. Resources available to scheduler: Number of instances=1, total 
> number of slots=4
>       at 
> org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleTask(Scheduler.java:220)
>       at 
> org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleImmediately(Scheduler.java:135)
>       at 
> org.apache.flink.runtime.executiongraph.Execution.scheduleForExecution(Execution.java:203)
>       at 
> org.apache.flink.runtime.executiongraph.ExecutionVertex.scheduleForExecution(ExecutionVertex.java:342)
>       at 
> org.apache.flink.runtime.executiongraph.ExecutionGraph.lookupConnectionInfoAndDeployReceivers(ExecutionGraph.java:585)
> {code}



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