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Race condition with Slick in tests.

See original GitHub issue

I have the following “errors” in my tests:

2018-05-04 08:40:05,007 WARN  slick.basic.BasicBackend.stream - Error scheduling synchronous streaming
java.util.concurrent.RejectedExecutionException: Task slick.basic.BasicBackend$DatabaseDef$$anon$3@32476d51 rejected from slick.util.AsyncExecutor$$anon$2$$anon$1@25475727[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 150]
	at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063)
	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830)
	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1379)
	at slick.util.AsyncExecutor$$anon$2$$anon$3.execute(AsyncExecutor.scala:161)
	at slick.basic.BasicBackend$DatabaseDef.scheduleSynchronousStreaming(BasicBackend.scala:301)
	at slick.basic.BasicBackend$DatabaseDef.scheduleSynchronousStreaming$(BasicBackend.scala:299)
	at slick.jdbc.JdbcBackend$DatabaseDef.scheduleSynchronousStreaming(JdbcBackend.scala:37)
	at slick.basic.BasicBackend$DatabaseDef.streamSynchronousDatabaseAction(BasicBackend.scala:294)
	at slick.basic.BasicBackend$DatabaseDef.streamSynchronousDatabaseAction$(BasicBackend.scala:292)
	at slick.jdbc.JdbcBackend$DatabaseDef.streamSynchronousDatabaseAction(JdbcBackend.scala:37)
	at slick.basic.BasicBackend$DatabaseDef.slick$basic$BasicBackend$DatabaseDef$$runInContextInline(BasicBackend.scala:239)
	at slick.basic.BasicBackend$DatabaseDef.runInContextSafe(BasicBackend.scala:147)
	at slick.basic.BasicBackend$DatabaseDef.runInContext(BasicBackend.scala:141)
	at slick.basic.BasicBackend$DatabaseDef.runInContext$(BasicBackend.scala:140)
	at slick.jdbc.JdbcBackend$DatabaseDef.runInContext(JdbcBackend.scala:37)
	at slick.basic.BasicBackend$DatabaseDef$$anon$1.subscribe(BasicBackend.scala:117)
	at akka.stream.impl.fusing.ActorGraphInterpreter$BatchingActorInputBoundary.preStart(ActorGraphInterpreter.scala:117)
	at akka.stream.impl.fusing.GraphInterpreter.init(GraphInterpreter.scala:295)
	at akka.stream.impl.fusing.GraphInterpreterShell.init(ActorGraphInterpreter.scala:554)
	at akka.stream.impl.fusing.ActorGraphInterpreter.tryInit(ActorGraphInterpreter.scala:676)
	at akka.stream.impl.fusing.ActorGraphInterpreter.preStart(ActorGraphInterpreter.scala:724)
	at akka.actor.Actor.aroundPreStart(Actor.scala:528)
	at akka.actor.Actor.aroundPreStart$(Actor.scala:528)
	at akka.stream.impl.fusing.ActorGraphInterpreter.aroundPreStart(ActorGraphInterpreter.scala:667)
	at akka.actor.ActorCell.create(ActorCell.scala:654)
	at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:525)
	at akka.actor.ActorCell.systemInvoke(ActorCell.scala:547)
	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)
	at akka.dispatch.Mailbox.run(Mailbox.scala:223)
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
	at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
2018-05-04 08:40:05,401 WARN  slick.basic.BasicBackend.stream - Error scheduling synchronous streaming
java.util.concurrent.RejectedExecutionException: Task slick.basic.BasicBackend$DatabaseDef$$anon$3@491ea42e rejected from slick.util.AsyncExecutor$$anon$2$$anon$1@25475727[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 150]
	at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063)
	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830)
	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1379)
	at slick.util.AsyncExecutor$$anon$2$$anon$3.execute(AsyncExecutor.scala:161)
	at slick.basic.BasicBackend$DatabaseDef.scheduleSynchronousStreaming(BasicBackend.scala:301)
	at slick.basic.BasicBackend$DatabaseDef.scheduleSynchronousStreaming$(BasicBackend.scala:299)
	at slick.jdbc.JdbcBackend$DatabaseDef.scheduleSynchronousStreaming(JdbcBackend.scala:37)
	at slick.basic.BasicBackend$DatabaseDef.streamSynchronousDatabaseAction(BasicBackend.scala:294)
	at slick.basic.BasicBackend$DatabaseDef.streamSynchronousDatabaseAction$(BasicBackend.scala:292)
	at slick.jdbc.JdbcBackend$DatabaseDef.streamSynchronousDatabaseAction(JdbcBackend.scala:37)
	at slick.basic.BasicBackend$DatabaseDef.slick$basic$BasicBackend$DatabaseDef$$runInContextInline(BasicBackend.scala:239)
	at slick.basic.BasicBackend$DatabaseDef.runInContextSafe(BasicBackend.scala:147)
	at slick.basic.BasicBackend$DatabaseDef.runInContext(BasicBackend.scala:141)
	at slick.basic.BasicBackend$DatabaseDef.runInContext$(BasicBackend.scala:140)
	at slick.jdbc.JdbcBackend$DatabaseDef.runInContext(JdbcBackend.scala:37)
	at slick.basic.BasicBackend$DatabaseDef$$anon$1.subscribe(BasicBackend.scala:117)
	at akka.stream.impl.fusing.ActorGraphInterpreter$BatchingActorInputBoundary.preStart(ActorGraphInterpreter.scala:117)
	at akka.stream.impl.fusing.GraphInterpreter.init(GraphInterpreter.scala:295)
	at akka.stream.impl.fusing.GraphInterpreterShell.init(ActorGraphInterpreter.scala:554)
	at akka.stream.impl.fusing.ActorGraphInterpreter.tryInit(ActorGraphInterpreter.scala:676)
	at akka.stream.impl.fusing.ActorGraphInterpreter.preStart(ActorGraphInterpreter.scala:724)
	at akka.actor.Actor.aroundPreStart(Actor.scala:528)
	at akka.actor.Actor.aroundPreStart$(Actor.scala:528)
	at akka.stream.impl.fusing.ActorGraphInterpreter.aroundPreStart(ActorGraphInterpreter.scala:667)
	at akka.actor.ActorCell.create(ActorCell.scala:654)
	at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:525)
	at akka.actor.ActorCell.systemInvoke(ActorCell.scala:547)
	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)
	at akka.dispatch.Mailbox.run(Mailbox.scala:223)
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
	at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

It does not break my tests, it’s just ugly in the tests results.

Does anyone else have this problem ?

I use Lagom 1.4 with Scala.

The Slick people opinion is that it’s a race condition (see: https://github.com/slick/slick/issues/1892#issuecomment-386555870) but I don’t know how to debug that.

Issue Analytics

  • State:open
  • Created 5 years ago
  • Reactions:1
  • Comments:15 (13 by maintainers)

github_iconTop GitHub Comments

2reactions
guizmaiicommented, May 29, 2018

@ignasi35 we’re using Lagom 1.4.5 and if I remember well the problem always happened in the Lagom 1.4 branch.

I don’t remember if the problem exists in Lagom 1.3.

1reaction
kflorencecommented, Sep 5, 2018

@igorbolic thanks! confirmed that doing the above works with Lagom 1.4.5 and Scala:

  override protected def afterAll(): Unit = {
    TestKit.shutdownActorSystem(server.actorSystem)
    server.stop()
  }
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