IllegalStateException: Feeder is now empty, stopping engine

[alex bagehot]

Hi,

with snapshot from the 24th,

If I have the following simulation which (for test case purposes only, normally it would find file paths) doesn't find any data,

Gatling fails with the errors below.

I am not totally sure why it throws the exception as with small changes to the code  like removing the filter it appears to avoid the error. It's not blocking me but thought it worth reporting the error.

Thanks,

Alex

  def matchesExtension(file: File, extensions: Set[String]) =

    extensions.exists(ext => file.getName.toLowerCase.contains("." + ext))

  def findPaths(root: String, extensions: Set[String]): Array[Map[String, String]] =

    findFiles(new File(root))

      .filter(matchesExtension(_, extensions))

      .map(f => Map("path" -> f.getPath.drop(root.length)))

      .toArray

  def findFiles(f: File): Stream[File] = f #:: (Stream.empty)

  val data = findPaths("/nowhere", Set("txt", "out", "logs")).random

      

    val request = exec(

          http("req").get("req?${data}"))

            )

  val scn = scenario("requests")

  .feed(data)

   .exec(request)

---->

Simulation ASimulation started...

================================================================================

2014-04-28 15:01:52                                           0s elapsed

---- requests ------------------------------------------------------------------

[                                                                          ]  0%

          waiting: 60     / running: 0      / done:0     

---- Requests ------------------------------------------------------------------

> Global                                                   (OK=0      KO=0     )

================================================================================

15:01:52.424 [ERROR] i.g.h.a.HttpRequestAction - No attribute named 'data' is defined

================================================================================

2014-04-28 15:01:57                                           5s elapsed

---- requests ------------------------------------------------------------------

[#                                                                         ]  1%

          waiting: 59     / running: 0      / done:1     

---- Requests ------------------------------------------------------------------

> Global                                                   (OK=0      KO=0     )

================================================================================

15:01:57.529 [ERROR] i.g.c.a.SingletonFeed - Feeder is now empty, stopping engine

15:01:57.530 [ERROR] i.g.h.a.HttpRequestAction - No attribute named 'data' is defined

================================================================================

2014-04-28 15:01:57                                           5s elapsed

---- requests ------------------------------------------------------------------

[##                                                                        ]  3%

          waiting: 58     / running: 0      / done:2     

---- Requests ------------------------------------------------------------------

> Global                                                   (OK=0      KO=0     )

================================================================================

Exception in thread "main" java.lang.IllegalStateException: Feeder is now empty, stopping engine

at io.gatling.core.action.SingletonFeed.feed(SingletonFeed.scala:60)

at io.gatling.core.action.SingletonFeed$$anonfun$receive$1.applyOrElse(SingletonFeed.scala:28)

at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498)

at akka.actor.ActorCell.invoke(ActorCell.scala:456)

at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)

at akka.dispatch.Mailbox.run(Mailbox.scala:219)

at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:385)

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)

15:01:57.603 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.603 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.603 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.603 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.604 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.605 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

15:01:57.605 [ERROR] i.g.c.c.Controller$ - Controller hasn't been started

...

errors printed 1 for each user in the simulation

[Stéphane Landelle]

That's the standard feeder behavior: it stops the simulation once the feeder is empty.

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[alex bagehot]

ok thanks