Very strange error?

Gatling (Open-Source)
1

Hello All,

I am a quite lost, because every time I run this scenario everything works.

import Setup._
import Test._
import scala.io.Source
import scala.concurrent.duration._
import io.gatling.core.Predef._
import io.gatling.http.Predef._
import io.gatling.jdbc.Predef._
import io.gatling.core.feeder._
import io.gatling.core.json.Jackson

class Runner extends Simulation {

val httpProtocol = new configuration testProtocol
val login = new tLogin tLogin
val You = new tAdvies tYRun
val Advice = new configuration mAdvice
val Credentials = new configuration mUser // goes to => val mUser = csv(“mUser.csv”)

val scn = scenario(“Scenario”).feed(Credentials).feed(Advice)
.group(“testScenario”) {
exec(login, You)
}
setUp(scn.inject(atOnceUsers(1))).protocols(httpProtocol)
}

BUT when i run this with multiple users I get this error:

16:16:40.172 [GatlingSystem-akka.actor.default-dispatcher-17][ERROR][SingletonFeed.scala:59] i.g.c.a.SingletonFeed - Feeder is now empty, stopping engine

java.lang.reflect.InvocationTargetException
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:606)
at scala_maven_executions.MainHelper.runMain(MainHelper.java:164)
at scala_maven_executions.MainWithArgsInFile.main(MainWithArgsInFile.java:26)
Caused by: 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$1.applyOrElse(SingletonFeed.scala:28)
at akka.actor.Actor$class.aroundReceive(Actor.scala:465)
at io.gatling.core.akka.BaseActor.aroundReceive(BaseActor.scala:23)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
at akka.actor.ActorCell.invoke(ActorCell.scala:487)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
at akka.dispatch.Mailbox.run(Mailbox.scala:220)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

My feeder = val mUser = csv(“mUser.csv”)

and looks like this

username,password
JohnDoe,Passmatazz

JaneDoe,Passmawzz

and so one.

tnx all really lost in this one

2

http://gatling.io/docs/2.0.0/session/feeder.html#feeders

“.queue // default behavior: use an Iterator on the underlying sequence”
“If the Feeder can’t produce enough records, Gatling will complain about it and your simulation will stop.”

3

Sorry for wasting your time on something this small, but I am still at a loss.

How can it be that when I have 9 user/passwords and I want to use 9 users and the I use .circular or .random that I keep getting this error?

sorry and tnx

4

You’re obviously doing something wrong, but can’t tell without see your real code.

5

import Setup._

6

the strange thing is that I am seeing the credentials when I println the val?

7

My2cents: the feeder that’s empty is the second one: Advice.