# ConnectTimeoutException: connection timed out:

**URL:** <https://community.gatling.io/t/connecttimeoutexception-connection-timed-out/4232>\
**Category:** Gatling (Open-Source)\
**Created:** [March 17, 2018, 11:34am UTC](https://community.gatling.io/t/connecttimeoutexception-connection-timed-out/4232 "2018-03-17T11:34:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Kapil](https://avatars.discourse-cdn.com/v4/letter/k/b9bd4f/32.png) [@Kapil](https://community.gatling.io/u/Kapil)\
**Post date:** [March 17, 2018, 11:34am UTC](https://community.gatling.io/t/connecttimeoutexception-connection-timed-out/4232/1 "2018-03-17T11:34:25Z")

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getting loads of error when ramping more user. is this something to do with gatling configuration or server issue ?

10:39:43.720 [DEBUG] i.g.h.a.AsyncHandler - Request ‘TX02\_Login\_SubmitLogin’ failed for user 36

io.netty.channel.ConnectTimeoutException: connection timed out: XXXXXXXXXXX/XXXXXXXX:443

at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe$1.run(AbstractNioChannel.java:218)

… 7 common frames omitted

Wrapped by: java.net.ConnectException: connection timed out: XXXXXXXXXXX/XXXXXXXX:443

at org.asynchttpclient.netty.channel.NettyConnectListener.onFailure(NettyConnectListener.java:168)

at org.asynchttpclient.netty.request.NettyChannelConnector$1.onFailure(NettyChannelConnector.java:103)

at org.asynchttpclient.netty.SimpleChannelFutureListener.operationComplete(SimpleChannelFutureListener.java:28)

at org.asynchttpclient.netty.SimpleChannelFutureListener.operationComplete(SimpleChannelFutureListener.java:20)

at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:507)

at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:500)

at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:479)

at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:420)

at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:122)

at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe$1.run(AbstractNioChannel.java:220)

at io.netty.util.concurrent.PromiseTask$RunnableAdapter.call(PromiseTask.java:38)

at io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:120)

at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:399)

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:464)

at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131)

at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)

at java.lang.Thread.run(Thread.java:748)

10:39:43.720 [WARN] i.g.h.a.ResponseProcessor - Request ‘TX02\_Login\_SubmitLogin’ failed: j.n.ConnectException: connection timed out: XXXXXXXXXXX/XXXXXXXX:443

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**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:** [March 17, 2018, 11:58am UTC](https://community.gatling.io/t/connecttimeoutexception-connection-timed-out/4232/2 "2018-03-17T11:58:05Z")

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Most likely server issue.

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<div class="post-metadata">

**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:** [March 20, 2018, 8:06pm UTC](https://community.gatling.io/t/connecttimeoutexception-connection-timed-out/4232/3 "2018-03-20T20:06:29Z")

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It’s all in the doc: [https://gatling.io/docs/current/http/http\_protocol/#connection-sharing](https://gatling.io/docs/current/http/http_protocol/#connection-sharing)