# WebSocket message size

**URL:** <https://community.gatling.io/t/websocket-message-size/4608>\
**Category:** Gatling (Open-Source)\
**Created:** [October 29, 2018, 6:48pm UTC](https://community.gatling.io/t/websocket-message-size/4608 "2018-10-29T18:48:04Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Alexander\_Mezhov](https://avatars.discourse-cdn.com/v4/letter/a/53a042/32.png) [@Alexander\_Mezhov](https://community.gatling.io/u/Alexander_Mezhov)\
**Post date:** [October 29, 2018, 6:48pm UTC](https://community.gatling.io/t/websocket-message-size/4608/1 "2018-10-29T18:48:04Z")

</div>

Hello!

I’m using Gatling v3.0 and have simple code like from the documentation:

> exec(ws(“Send”).sendText(“hello”)
> 
> .await(1 second) (
> 
> ws.checkTextMessage(“checkName”)
> 
> .matching(jsonPath(“$.uuid”).is(“${correlation}”))
> 
> .check(jsonPath(“$.code”).ofType[Int].is(1))
> 
> ))

When I run test I get an exception:

> Jodd failed to parse into a valid AST: j.j.JsonException: Syntax error! End of JSON
> 
> offset: 136778 near: “…format”:“#”
> 
> jodd.json.JsonException: Syntax error! End of JSON
> 
> offset: 136778 near: “…format”:“#”
> 
> at jodd.json.JsonParser.syntaxError(JsonParser.java:1231)
> 
> at jodd.json.JsonParser.\_parse(JsonParser.java:416)
> 
> at jodd.json.JsonParser.parse(JsonParser.java:382)
> 
> at io.gatling.core.json.JoddJson.parse(JoddJson.scala:27)
> 
> at io.gatling.core.json.JsonParsers.$anonfun$safeParseJodd$1(JsonParsers.scala:43)
> 
> at io.gatling.commons.validation.package$.safely(package.scala:34)
> 
> at io.gatling.core.json.JsonParsers.safeParseJodd(JsonParsers.scala:43)
> 
> at io.gatling.core.json.JsonParsers.safeParse(JsonParsers.scala:49)
> 
> at io.gatling.http.check.ws.WsJsonPathCheckMaterializer.$anonfun$preparer$1(WsJsonPathCheckMaterializer.scala:27)
> 
> at io.gatling.core.check.CheckBase.memoizedPrepared$1(Check.scala:74)
> 
> at io.gatling.core.check.CheckBase.$anonfun$check$6(Check.scala:88)
> 
> at io.gatling.commons.validation.Success.flatMap(Validation.scala:43)
> 
> at io.gatling.core.check.CheckBase.$anonfun$check$4(Check.scala:87)
> 
> at io.gatling.commons.validation.Success.flatMap(Validation.scala:43)
> 
> at io.gatling.core.check.CheckBase.check(Check.scala:86)
> 
> at io.gatling.http.check.ws.WsTextCheck.check(WsCheck.scala:28)
> 
> at io.gatling.http.check.ws.WsTextCheck.check(WsCheck.scala:26)
> 
> at io.gatling.http.action.ws.fsm.WhenPerformingCheck.$anonfun$tryApplyingChecks$1(WhenPerformingCheck.scala:122)
> 
> at io.gatling.http.action.ws.fsm.WhenPerformingCheck.$anonfun$tryApplyingChecks$1$adapted(WhenPerformingCheck.scala:122)
> 
> at scala.collection.LinearSeqOptimized.forall(LinearSeqOptimized.scala:81)
> 
> at scala.collection.LinearSeqOptimized.forall$(LinearSeqOptimized.scala:78)
> 
> at scala.collection.immutable.List.forall(List.scala:85)
> 
> at io.gatling.http.action.ws.fsm.WhenPerformingCheck.io$gatling$http$action$ws$fsm$WhenPerformingCheck$$tryApplyingChecks(WhenPerformingCheck.scala:122)
> 
> at io.gatling.http.action.ws.fsm.WhenPerformingCheck$$anonfun$1.applyOrElse(WhenPerformingCheck.scala:60)
> 
> at io.gatling.http.action.ws.fsm.WhenPerformingCheck$$anonfun$1.applyOrElse(WhenPerformingCheck.scala:30)
> 
> at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:34)
> 
> at akka.actor.FSM.processEvent(FSM.scala:684)
> 
> at akka.actor.FSM.processEvent$(FSM.scala:681)
> 
> at io.gatling.http.action.ws.fsm.WsActorFSM.processEvent(WsActorFSM.scala:52)
> 
> at akka.actor.FSM.akka$actor$FSM$$processMsg(FSM.scala:678)
> 
> at akka.actor.FSM$$anonfun$receive$1.applyOrElse(FSM.scala:672)
> 
> at akka.actor.Actor.aroundReceive(Actor.scala:517)
> 
> at akka.actor.Actor.aroundReceive$(Actor.scala:515)
> 
> at io.gatling.core.akka.BaseActor.aroundReceive(BaseActor.scala:24)
> 
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:588)
> 
> at akka.actor.ActorCell.invoke(ActorCell.scala:557)
> 
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258)
> 
> at akka.dispatch.Mailbox.run(Mailbox.scala:225)
> 
> at akka.dispatch.Mailbox.exec(Mailbox.scala:235)
> 
> at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> 
> at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> 
> at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> 
> at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

I know that my incoming message is quite big and most likely Gatling cuts it off because there are some limits on message size. I can see it my simulation.log in TRACE mode.

How can I increase max message size?

Thank you

---

<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:** [October 29, 2018, 9:00pm UTC](https://community.gatling.io/t/websocket-message-size/4608/2 "2018-10-29T21:00:28Z")

</div>

A bug indeed: [https://github.com/gatling/gatling/issues/3589](https://github.com/gatling/gatling/issues/3589)

Thanks for reporting.

---

<div class="post-metadata">

**Author:** ![Alexander\_Mezhov](https://avatars.discourse-cdn.com/v4/letter/a/53a042/32.png) [@Alexander\_Mezhov](https://community.gatling.io/u/Alexander_Mezhov)\
**Post date:** [October 30, 2018, 5:17am UTC](https://community.gatling.io/t/websocket-message-size/4608/3 "2018-10-30T05:17:00Z")

</div>

When are you going to release 3.0.1?

---

<div class="post-metadata">

**Author:** ![Alexander\_Mezhov](https://avatars.discourse-cdn.com/v4/letter/a/53a042/32.png) [@Alexander\_Mezhov](https://community.gatling.io/u/Alexander_Mezhov)\
**Post date:** [October 30, 2018, 5:37am UTC](https://community.gatling.io/t/websocket-message-size/4608/4 "2018-10-30T05:37:59Z")

</div>

Is there workaround which I can apply until 3.0.1?