java.lang.UnsupportedOperationException: You can't use HTTP/2 if OpenSSL is not available and Java doesn't support it either

Gatling (Open-Source)
1

Gatling 3.7.6
JDK17

Hi,
I have enabled “.enableHttp2” in my script.

val config = http.baseUrl(SystemConfig.targetUrl)
.enableHttp2
.acceptHeader("/")
.acceptEncodingHeader(“gzip, deflate”)
.acceptLanguageHeader(“en-US,en;q=0.5”)
.userAgentHeader(s"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Safari/537.36")

When I run test I have
“[error] java.lang.UnsupportedOperationException: You can’t use HTTP/2 if OpenSSL is not available and Java doesn’t support it either”.
In previous versions, 3.7.4 and 3.7.5 everything works fine.
I don’t know if it’s a bug or is a new feature?

Regards,
Daniel

2

There’s not enough information to help you. Please check How to Ask a Question - #2

  • How do you use Gatling? bundle? maven? gradle? sbt?
  • What’s your platform?
  • Have you checked that the Java version you’re actually using is really the one you think it is? eg print it in your Simulation:
System.out.println("java.version=" + System.getProperty("java.version"))
System.out.println("os.name=" + System.getProperty("os.name"))
System.out.println("os.version=" + System.getProperty("os.version"))
System.out.println("os.arch=" + System.getProperty("os.arch"))
3
  • How do you use Gatling? bundle? maven? gradle? sbt?
    Sbt - sbt version = 1.6.2, sbt.gatling.plugin.version = 4.1.5

java.version=17.0.2
os.name=Mac OS X
os.version=12.3
os.arch=aarch64

4

This is an issue on your side.

You might have a corrupted jar in your ivy2 or maven cache.

Verify that the following artifact is in there and can properly be decompressed:

<groupId>io.netty</groupId>
<artifactId>netty-tcnative-boringssl-static</artifactId>
<version>2.0.50.Final</version>
<classifier>osx-aarch_64</classifier>
5

Thanks for answering @slandelle, but I’m confused. Where I should check “io.netty”? In pom file? I changed JDK from 11, reinstall SBT. But it still the same problem for 3.7.5 works fine for 3.7.6 no. This is my full log.

145 [pool-1-thread-1] INFO io.gatling.core.config.GatlingConfiguration$ - Gatling will try to load ‘gatling.conf’ config file as ClassLoader resource.
367 [GatlingSystem-akka.actor.default-dispatcher-5] INFO akka.event.slf4j.Slf4jLogger - Slf4jLogger started
563 [pool-1-thread-1] DEBUG io.netty.util.internal.logging.InternalLoggerFactory - Using SLF4J as the default logging framework
573 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - -Dio.netty.noUnsafe: false
573 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - Java version: 11
573 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available
573 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available
574 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Buffer.address: available
574 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - direct buffer constructor: unavailable: Reflective setAccessible(true) disabled
574 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: available, true
574 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable: class io.netty.util.internal.PlatformDependent0$6 cannot access class jdk.internal.misc.Unsafe (in module java.base) because module java.base does not export jdk.internal.misc to unnamed module @1ed68288
575 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent0 - java.nio.DirectByteBuffer.(long, int): unavailable
575 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - sun.misc.Unsafe: available
583 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - maxDirectMemory: 3221225472 bytes (maybe)
583 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.tmpdir: /var/folders/0f/sbtkt5bn54xdzmmz6w_cn34w0000gp/T (java.io.tmpdir)
583 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.bitMode: 64 (sun.arch.data.model)
583 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - Platform: MacOS
584 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.maxDirectMemory: -1 bytes
584 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.uninitializedArrayAllocationThreshold: -1
584 [pool-1-thread-1] DEBUG io.netty.util.internal.CleanerJava9 - java.nio.ByteBuffer.cleaner(): available
584 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - -Dio.netty.noPreferDirect: false
587 [pool-1-thread-1] DEBUG io.netty.channel.MultithreadEventLoopGroup - -Dio.netty.eventLoopThreads: 16
593 [pool-1-thread-1] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024
593 [pool-1-thread-1] DEBUG io.netty.util.internal.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096
598 [pool-1-thread-1] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.noKeySetOptimization: false
598 [pool-1-thread-1] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.selectorAutoRebuildThreshold: 512
602 [pool-1-thread-1] DEBUG io.netty.util.internal.PlatformDependent - org.jctools-core.MpscChunkedArrayQueue: available
814 [pool-1-thread-1] DEBUG io.netty.util.internal.NativeLibraryLoader - -Dio.netty.native.workdir: /var/folders/0f/sbtkt5bn54xdzmmz6w_cn34w0000gp/T (io.netty.tmpdir)
814 [pool-1-thread-1] DEBUG io.netty.util.internal.NativeLibraryLoader - -Dio.netty.native.deleteLibAfterLoading: true
814 [pool-1-thread-1] DEBUG io.netty.util.internal.NativeLibraryLoader - -Dio.netty.native.tryPatchShadedId: true
814 [pool-1-thread-1] DEBUG io.netty.util.internal.NativeLibraryLoader - -Dio.netty.native.detectNativeLibraryDuplicates: true
822 [pool-1-thread-1] DEBUG io.netty.handler.ssl.OpenSsl - Failed to load netty-tcnative; OpenSslEngine will be unavailable, unless the application has already loaded the symbols by some other means. See Netty.docs: Forked Tomcat Native for more information.
java.lang.IllegalArgumentException: Failed to load any of the given libraries: [netty_tcnative_osx_aarch_64, netty_tcnative_aarch_64, netty_tcnative]
at io.netty.util.internal.NativeLibraryLoader.loadFirstAvailable(NativeLibraryLoader.java:114)
at io.netty.handler.ssl.OpenSsl.loadTcNative(OpenSsl.java:705)
at io.netty.handler.ssl.OpenSsl.(OpenSsl.java:146)
at io.netty.handler.ssl.SslProvider.isAlpnSupported(SslProvider.java:53)
at io.gatling.http.protocol.HttpProtocolBuilder.enableHttp2(HttpProtocolBuilder.scala:146)
at config.HttpConfig$.protocolConfig(HttpConfig.scala:10)
at identity.simulations.LogInAndLogOutSimulation.(LogInAndLogOutSimulation.scala:11)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at java.base/java.lang.Class.newInstance(Class.java:584)
at io.gatling.app.SimulationClass$Scala.params(SimulationClass.scala:31)
at io.gatling.app.Runner.run0(Runner.scala:62)
at io.gatling.app.Runner.run(Runner.scala:49)
at io.gatling.app.Gatling$.start(Gatling.scala:87)
at io.gatling.app.Gatling$.fromArgs(Gatling.scala:49)
at io.gatling.app.Gatling$.fromSbtTestFramework(Gatling.scala:45)
at io.gatling.sbt.GatlingTask.liftedTree1$1(GatlingTask.scala:52)
at io.gatling.sbt.GatlingTask.execute(GatlingTask.scala:51)
at sbt.ForkMain$Run.lambda$runTest$1(ForkMain.java:413)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Suppressed: java.lang.UnsatisfiedLinkError: could not load a native library: netty_tcnative_osx_aarch_64
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:224)
at io.netty.util.internal.NativeLibraryLoader.loadFirstAvailable(NativeLibraryLoader.java:105)
… 24 common frames omitted
Caused by: java.io.FileNotFoundException: META-INF/native/libnetty_tcnative_osx_aarch_64.jnilib
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:166)
… 25 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: no netty_tcnative_osx_aarch_64 in java.library.path: [/Users/daniel.safinski/Library/Java/Extensions, /Library/Java/Extensions, /Network/Library/Java/Extensions, /System/Library/Java/Extensions, /usr/lib/java, .]
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2670)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
at java.base/java.lang.System.loadLibrary(System.java:1873)
at io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
at io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:376)
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:146)
… 25 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: no netty_tcnative_osx_aarch_64 in java.library.path: [/Users/daniel.safinski/Library/Java/Extensions, /Library/Java/Extensions, /Network/Library/Java/Extensions, /System/Library/Java/Extensions, /usr/lib/java, .]
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2670)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
at java.base/java.lang.System.loadLibrary(System.java:1873)
at io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at io.netty.util.internal.NativeLibraryLoader$1.run(NativeLibraryLoader.java:410)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at io.netty.util.internal.NativeLibraryLoader.loadLibraryByHelper(NativeLibraryLoader.java:402)
at io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:368)
… 26 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: could not load a native library: netty_tcnative_aarch_64
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:224)
at io.netty.util.internal.NativeLibraryLoader.loadFirstAvailable(NativeLibraryLoader.java:105)
… 24 common frames omitted
Caused by: java.io.FileNotFoundException: META-INF/native/libnetty_tcnative_aarch_64.jnilib
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:166)
… 25 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: no netty_tcnative_aarch_64 in java.library.path: [/Users/daniel.safinski/Library/Java/Extensions, /Library/Java/Extensions, /Network/Library/Java/Extensions, /System/Library/Java/Extensions, /usr/lib/java, .]
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2670)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
at java.base/java.lang.System.loadLibrary(System.java:1873)
at io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
at io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:376)
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:146)
… 25 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: no netty_tcnative_aarch_64 in java.library.path: [/Users/daniel.safinski/Library/Java/Extensions, /Library/Java/Extensions, /Network/Library/Java/Extensions, /System/Library/Java/Extensions, /usr/lib/java, .]
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2670)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
at java.base/java.lang.System.loadLibrary(System.java:1873)
at io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at io.netty.util.internal.NativeLibraryLoader$1.run(NativeLibraryLoader.java:410)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at io.netty.util.internal.NativeLibraryLoader.loadLibraryByHelper(NativeLibraryLoader.java:402)
at io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:368)
… 26 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: could not load a native library: netty_tcnative
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:224)
at io.netty.util.internal.NativeLibraryLoader.loadFirstAvailable(NativeLibraryLoader.java:105)
… 24 common frames omitted
Caused by: java.io.FileNotFoundException: META-INF/native/libnetty_tcnative.jnilib
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:166)
… 25 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: no netty_tcnative in java.library.path: [/Users/daniel.safinski/Library/Java/Extensions, /Library/Java/Extensions, /Network/Library/Java/Extensions, /System/Library/Java/Extensions, /usr/lib/java, .]
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2670)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
at java.base/java.lang.System.loadLibrary(System.java:1873)
at io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
at io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:376)
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:146)
… 25 common frames omitted
Suppressed: java.lang.UnsatisfiedLinkError: no netty_tcnative in java.library.path: [/Users/daniel.safinski/Library/Java/Extensions, /Library/Java/Extensions, /Network/Library/Java/Extensions, /System/Library/Java/Extensions, /usr/lib/java, .]
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2670)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:830)
at java.base/java.lang.System.loadLibrary(System.java:1873)
at io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:38)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at io.netty.util.internal.NativeLibraryLoader$1.run(NativeLibraryLoader.java:410)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at io.netty.util.internal.NativeLibraryLoader.loadLibraryByHelper(NativeLibraryLoader.java:402)
at io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:368)
… 26 common frames omitted
823 [pool-1-thread-1] DEBUG io.netty.handler.ssl.OpenSsl - Initialize netty-tcnative using engine: ‘default’
824 [pool-1-thread-1] DEBUG io.netty.handler.ssl.OpenSsl - Failed to initialize netty-tcnative; OpenSslEngine will be unavailable. See Netty.docs: Forked Tomcat Native for more information.
java.lang.UnsatisfiedLinkError: ‘int io.netty.internal.tcnative.Library.aprMajorVersion()’
at io.netty.internal.tcnative.Library.aprMajorVersion(Native Method)
at io.netty.internal.tcnative.Library.initialize(Library.java:191)
at io.netty.handler.ssl.OpenSsl.initializeTcNative(OpenSsl.java:710)
at io.netty.handler.ssl.OpenSsl.(OpenSsl.java:163)
at io.netty.handler.ssl.SslProvider.isAlpnSupported(SslProvider.java:53)
at io.gatling.http.protocol.HttpProtocolBuilder.enableHttp2(HttpProtocolBuilder.scala:146)
at config.HttpConfig$.protocolConfig(HttpConfig.scala:10)
at identity.simulations.LogInAndLogOutSimulation.(LogInAndLogOutSimulation.scala:11)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at java.base/java.lang.Class.newInstance(Class.java:584)
at io.gatling.app.SimulationClass$Scala.params(SimulationClass.scala:31)
at io.gatling.app.Runner.run0(Runner.scala:62)
at io.gatling.app.Runner.run(Runner.scala:49)
at io.gatling.app.Gatling$.start(Gatling.scala:87)
at io.gatling.app.Gatling$.fromArgs(Gatling.scala:49)
at io.gatling.app.Gatling$.fromSbtTestFramework(Gatling.scala:45)
at io.gatling.sbt.GatlingTask.liftedTree1$1(GatlingTask.scala:52)
at io.gatling.sbt.GatlingTask.execute(GatlingTask.scala:51)
at sbt.ForkMain$Run.lambda$runTest$1(ForkMain.java:413)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
824 [pool-1-thread-1] ERROR io.gatling.app.Gatling$ - Run crashed
java.lang.UnsupportedOperationException: You can’t use HTTP/2 if OpenSSL is not available and Java doesn’t support it either
at io.gatling.http.protocol.HttpProtocolBuilder.enableHttp2(HttpProtocolBuilder.scala:149)
at config.HttpConfig$.protocolConfig(HttpConfig.scala:10)
at identity.simulations.LogInAndLogOutSimulation.(LogInAndLogOutSimulation.scala:11)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at java.base/java.lang.Class.newInstance(Class.java:584)
at io.gatling.app.SimulationClass$Scala.params(SimulationClass.scala:31)
at io.gatling.app.Runner.run0(Runner.scala:62)
at io.gatling.app.Runner.run(Runner.scala:49)
at io.gatling.app.Gatling$.start(Gatling.scala:87)
at io.gatling.app.Gatling$.fromArgs(Gatling.scala:49)
at io.gatling.app.Gatling$.fromSbtTestFramework(Gatling.scala:45)
at io.gatling.sbt.GatlingTask.liftedTree1$1(GatlingTask.scala:52)
at io.gatling.sbt.GatlingTask.execute(GatlingTask.scala:51)
at sbt.ForkMain$Run.lambda$runTest$1(ForkMain.java:413)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
836 [GatlingSystem-akka.actor.default-dispatcher-5] INFO akka.actor.CoordinatedShutdown - Running CoordinatedShutdown with reason [ActorSystemTerminateReason]

And screenshot from jar pom file:

Screenshot 2022-04-07 at 18.13.40
Screenshot 2022-04-07 at 18.13.401248×694 170 KB

6

The issue is with your installation. Your dependencies are not properly imported.

As you can see in the embedded pom.xml, netty-tcnative-boringssl-static with the jar (default) classifier should be pulling several artifacts, including the one with the osx-aarch_64 classifier which is the one you need for your M1 Mac.

They are definitely missing from your “External Libraries”.
Here’s what I have from a fresh import of https://github.com/gatling/gatling-sbt-plugin-demo:

intellij-external-libraries
intellij-external-libraries1360×962 205 KB

Try updating your IntelliJ installation and your Scala plugin version, and reimporting your project.

7

@slandelle Thank you for your explanation. I found where was the problem. In my “build.sbt” file I had “ThisBuild / useCoursier := false”. This flag works fine for 3.7.5 but not for 3.7.6. If it’s ok?

8

You should let coursier enabled (just remove this line). It used to not work properly with classifiers but we’ve contributed some fixes and it works now.

9

Netty has changed the dependency tree between the version pulled in Gatling 3.7.5 and the one pulled in 3.7.6. They switched to an uberjar containing the native libs for all the platform, to an empty jar pulling artifacts for each platform with different classifiers.

It seems to have triggered a bug in sbt with Coursier disabled. This bug is very unlikely to ever get fixed. Coursier works great now and is the default.

10

Thanks for the explanation I will remove this line.