gatling-sbtNoClassDefFoundError

Gatling (Open-Source)
1

Hello all,

I did a small project to use gatling with sbt using the sbt plugin

can be found here https://gitlab.com/jlebleu/gatlingxuc

Always have a NoClassDefFondEffor, and I can find what is my mistake.

If anyboday has an idea ?
Thanks

Here is the trace

[error] Uncaught exception when running computerdatabase.BasicSimulation: java.lang.NoClassDefFoundError: scala/collection/GenTraversableOnce$class
sbt.ForkMain$ForkError: scala/collection/GenTraversableOnce$class
at com.dongxiguo.fastring.Fastring.(Fastring.scala:25)
at io.gatling.core.util.StringHelper$$anon$1.(StringHelper.scala:53)
at io.gatling.core.util.StringHelper$.(StringHelper.scala:53)
at io.gatling.core.util.StringHelper$.(StringHelper.scala)
at io.gatling.core.config.GatlingConfiguration$.mapToGatlingConfig(GatlingConfiguration.scala:134)
at io.gatling.core.config.GatlingConfiguration$.setUp(GatlingConfiguration.scala:128)
at io.gatling.app.Gatling$.fromMap(Gatling.scala:54)
at io.gatling.app.Gatling$.runGatling(Gatling.scala:80)
at io.gatling.sbt.GatlingTask.liftedTree1$1(GatlingTask.scala:34)
at io.gatling.sbt.GatlingTask.execute(GatlingTask.scala:33)
at sbt.ForkMain$Run$2.call(ForkMain.java:294)
at sbt.ForkMain$Run$2.call(ForkMain.java:284)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: sbt.ForkMain$ForkError: scala.collection.GenTraversableOnce$class
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at com.dongxiguo.fastring.Fastring.(Fastring.scala:25)
at io.gatling.core.util.StringHelper$$anon$1.(StringHelper.scala:53)
at io.gatling.core.util.StringHelper$.(StringHelper.scala:53)
at io.gatling.core.util.StringHelper$.(StringHelper.scala)
at io.gatling.core.config.GatlingConfiguration$.mapToGatlingConfig(GatlingConfiguration.scala:134)
at io.gatling.core.config.GatlingConfiguration$.setUp(GatlingConfiguration.scala:128)
at io.gatling.app.Gatling$.fromMap(Gatling.scala:54)
at io.gatling.app.Gatling$.runGatling(Gatling.scala:80)
at io.gatling.sbt.GatlingTask.liftedTree1$1(GatlingTask.scala:34)
at io.gatling.sbt.GatlingTask.execute(GatlingTask.scala:33)
at sbt.ForkMain$Run$2.call(ForkMain.java:294)
at sbt.ForkMain$Run$2.call(ForkMain.java:284)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

2

Hi Jean-Yves,

That is your mistake : https://gitlab.com/jlebleu/gatlingxuc/blob/master/project/Dependencies.scala#L22
Gatling currently relies and is not cross-compiled (due to your our current use and integration of Zinc, SBT’s incremental compiler). Having both scala-library for 2.10 and 2.11 in the classpath is sure to cause issues like that.
Set your scalaVersion to “2.10.4” and it should work as expected.

Cheers,

Pierre

3

Hi Pierre,

Thank you very much !!!
Working now … as expected.
Rgds.
Jean-Yves