use gatling3 loadtest https error

first, I’m sorry, because I don’t know how search the issue.

machine info

$ free -m
total used free shared buff/cache available
Mem: 128649 3600 122104 849 2945 123459
Swap: 0 0 0

$ uname -a
Linux xxxx 3.10.0-693.5.2.el7.x86_64 #1 SMP Fri Oct 20 20:32:50 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

cpu: 54core

cmd: mvn gatling:test -Dusers=2000 -Dduring=300


10:55:41.920 [WARN ] i.g.h.e.GatlingHttpListener - Request ‘xxxTest’ failed for user 389818 connection timed out:
at io.netty.util.concurrent.PromiseTask$
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(
at io.netty.util.concurrent.SingleThreadEventExecutor$
10:55:41.921 [WARN ] i.g.h.e.r.DefaultStatsProcessor - Request ‘xxxTest’ failed for user 389818: i.n.c.ConnectTimeoutException: connection timed out:

Injector host couldn’t establish a TCP connection with remote host. Could be many things: IO saturated on injector or remote host, network… But tha’s for you to figure out.