# Getting Error io.gatling.app.Gatling$ - Run crashed **URL:** \ **Category:** Gatling (Open-Source)\ **Created:** [August 11, 2023, 5:31am UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197 "2023-08-11T05:31:08Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![harshit](https://avatars.discourse-cdn.com/v4/letter/h/c57346/32.png) [@harshit](https://community.gatling.io/u/harshit)\ **Post date:** [August 11, 2023, 5:31am UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/1 "2023-08-11T05:31:09Z")
While trying to run gatling test using mvn gatling:test I am getting this error Gatling Version: 3.6.1 Java version : 11 Scala version: 2.13.9 19:48:10.831 [main] ERROR io.gatling.app.Gatling$ - Run crashed java.lang.reflect.InvocationTargetException Caused by: java.lang.ClassNotFoundException: io.netty.internal.tcnative.CertificateCompressionAlgo at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ---
**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\ **Post date:** [August 11, 2023, 7:23am UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/2 "2023-08-11T07:23:45Z")
You have an issue with the `io.netty:netty-tcnative-classes` artifact. - either its missing from your dependencies because you’ve messed up with the dependency management, to be checked with `mvn dependency:tree` - or the entry in your local maven cache is corrupted, to be checked if you can unzip it, in this case delete it so maven downloads it again ---
**Author:** ![harshit](https://avatars.discourse-cdn.com/v4/letter/h/c57346/32.png) [@harshit](https://community.gatling.io/u/harshit)\ **Post date:** [August 11, 2023, 7:58am UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/3 "2023-08-11T07:58:43Z")
In the dependency tree I can see ± io.netty:netty-tcnative-classes:jar:2.0.55.Final:compile Still getting the error ---
**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\ **Post date:** [August 11, 2023, 8:52am UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/4 "2023-08-11T08:52:28Z")
What about the second part of my message? ---
**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\ **Post date:** [August 11, 2023, 8:56am UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/5 "2023-08-11T08:56:00Z")
Once you’ve solved this, make sure the netty and netty-tcnative modules are compatible, in particular if you’re messing up with the versions with some `dependencyManagement` or importing other librairies that depend on netty too (hint: you shouldn’t). ---
**Author:** ![harshit](https://avatars.discourse-cdn.com/v4/letter/h/c57346/32.png) [@harshit](https://community.gatling.io/u/harshit)\ **Post date:** [August 11, 2023, 10:39am UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/6 "2023-08-11T10:39:29Z")
I tried invalidating cache in intellij and delete .m2 folder to remove local cached dependency. But nothing seems to work I have \4.1.72.Final\ and netty-tcnative-classes 2.0.60.Final From what I checked they both are compatible. After few changes I have started getting this error java.lang.NoSuchMethodError: ‘boolean io.netty.internal.tcnative.SSLContext.setCurvesList(long, java.lang.String)’ Can you please help ---
**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\ **Post date:** [August 11, 2023, 12:16pm UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/7 "2023-08-11T12:16:37Z")
Why don’t you let Gatling handle the netty and netty-tcnative versions? You’re looking for trouble. You have zero guarantee that Gatling 3.6.1 is going to work with these versions. - dependencies versions in Gatling 3.6.1: [https://github.com/gatling/gatling/blob/v3.6.1/project/Dependencies.scala](https://github.com/gatling/gatling/blob/v3.6.1/project/Dependencies.scala) - dependencies versions in Gatling 3.9.5: [https://github.com/gatling/gatling/blob/v3.9.5/project/Dependencies.scala](https://github.com/gatling/gatling/blob/v3.9.5/project/Dependencies.scala) Any other combination is not supported and for you to figure out. If you want to use up-to-date netty versions, you should upgrade Gatling first. ---
**Author:** ![harshit](https://avatars.discourse-cdn.com/v4/letter/h/c57346/32.png) [@harshit](https://community.gatling.io/u/harshit)\ **Post date:** [August 11, 2023, 1:17pm UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/8 "2023-08-11T13:17:56Z")
FYI @slandelle I tried using gatling 3.9.5 but it had its own issues and I ended up getting java.lang.RuntimeException: Can’t find the jar matching scala-library-.\*.jar$ So I read somewhere to downgrade the version so I moved to 3.6.1 Why don’t you let Gatling handle the netty and netty-tcnative versions? Because I am working on a project where we already had these dependency in use from before, So I can not remove it. ---
**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\ **Post date:** [August 11, 2023, 1:26pm UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/9 "2023-08-11T13:26:58Z")
Sorry, but I’m afraid that there’s no way to help you unless you go with a paying consulting contract where we can investigate your setup indepth. ---
**Author:** ![system](https://europe1.discourse-cdn.com/flex013/uploads/gatling2/original/2X/b/b148e0742de35c6280726cabf3ecd3de2d320f63.png) [@system](https://community.gatling.io/u/system)\ **Post date:** [September 10, 2023, 1:27pm UTC](https://community.gatling.io/t/getting-error-io-gatling-app-gatling-run-crashed/8197/10 "2023-09-10T13:27:35Z")
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