Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/5600
+1 for merging this ASAP ð
The error message seems a bit disconcerting, though:
```
Finished
org.apache.flink.test.checkpointing.HAIncrementalRocksDbBackendEventTimeWindowCheckpointingITCase#testSlidingTimeWindow.
org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply$mcV$sp(JobManager.scala:891)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:834)
at
org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:834)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at
scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:39)
at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:415)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
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. Task to schedule: < Attempt #3 (Source: Custom Source (1/1)) @
(unassigned) - [SCHEDULED] > with groupID < bc764cd8ddf7a0cff126f51c16239658 >
in sharing group < 7c540813226d407fbf248f58c16b372c >. Resources available to
scheduler: Number of instances=2, total number of slots=4, available slots=0
at
org.apache.flink.runtime.jobmanager.scheduler.Scheduler.scheduleTask(Scheduler.java:281)
at
org.apache.flink.runtime.jobmanager.scheduler.Scheduler.allocateSlot(Scheduler.java:155)
at
org.apache.flink.runtime.executiongraph.Execution.lambda$allocateAndAssignSlotForExecution$1(Execution.java:489)
at
java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:981)
at
java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2124)
at
org.apache.flink.runtime.executiongraph.Execution.allocateAndAssignSlotForExecution(Execution.java:487)
at
org.apache.flink.runtime.executiongraph.ExecutionJobVertex.allocateResourcesForAll(ExecutionJobVertex.java:520)
at
org.apache.flink.runtime.executiongraph.ExecutionGraph.scheduleEager(ExecutionGraph.java:957)
at
org.apache.flink.runtime.executiongraph.ExecutionGraph.scheduleForExecution(ExecutionGraph.java:887)
at
org.apache.flink.runtime.executiongraph.ExecutionGraph.restart(ExecutionGraph.java:1282)
at
org.apache.flink.runtime.executiongraph.restart.ExecutionGraphRestartCallback.triggerFullRecovery(ExecutionGraphRestartCallback.java:59)
at
org.apache.flink.runtime.executiongraph.restart.FixedDelayRestartStrategy$1.run(FixedDelayRestartStrategy.java:68)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
```
---
