Facing memory leak on execution. We are using gatling 3.4.1 and using 3 injectors for load simulation. We are able to run the simulation with 1/6th of load but its failing while increasing the load. Any idea how to fix this issue?
Logs:-
2022-03-03 13:50:39,255 [ERROR] i.n.u.ResourceLeakDetector - LEAK: ReferenceCountedOpenSslContext.release() was not called before it’s garbage-collected. See Netty.docs: Reference counted objects for more information.
Recent access records:
Created at:
io.netty.handler.ssl.ReferenceCountedOpenSslContext.(ReferenceCountedOpenSslContext.java:240)
io.netty.handler.ssl.ReferenceCountedOpenSslClientContext.(ReferenceCountedOpenSslClientContext.java:67)
io.netty.handler.ssl.SslContext.newClientContextInternal(SslContext.java:836)
io.netty.handler.ssl.SslContextBuilder.build(SslContextBuilder.java:611)
io.gatling.http.util.SslContextsFactory.newSslContexts(SslContexts.scala:120)
io.gatling.http.engine.HttpEngine.newSslContexts(HttpEngine.scala:195)
io.gatling.http.cache.SslContextSupport$.$anonfun$setSslContexts$1(SslContextSupport.scala:54)
scala.Function1.$anonfun$andThen$1(Function1.scala:57)
scala.Function1.$anonfun$andThen$1(Function1.scala:57)
scala.Function1.$anonfun$andThen$1(Function1.scala:57)
scala.Function1.$anonfun$andThen$1(Function1.scala:57)
scala.Function1.$anonfun$andThen$1(Function1.scala:57)
io.gatling.core.controller.inject.Workload.startUser(Workload.scala:53)
io.gatling.core.controller.inject.Workload.$anonfun$injectUser$1(Workload.scala:66)
io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:384)
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
java.lang.Thread.run(Thread.java:748)
Hi,
You’re using Gatling 3.4.1, which was released in October, 2020. It’s very old. As of now, the current release is 3.7.6.
Please first upgrade and if you still experience an issue, please provide a reproducible example.
Cheers
Sorry we are using gatling version 3.6.1
Still, that’s not 3.7.6 
Please upgrade. Then, if you still experience an issue, please provide a reproducer as requested above.