Invalid container object

Gatling (Open-Source)
1

Hi,

I’m trying to create a test but I’m facing a problem when I use jsonPath. First I would like to know if there’s some log where I can find what was returned on each request or somewhere I can find the reason of this error:

java.lang.IllegalArgumentException: Invalid container object
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:208)
at io.gatling.core.check.extractor.jsonpath.JsonPathExtractors$.io$gatling$core$check$extractor$jsonpath$JsonPathExtractors$$extractAll(JsonPathExtractors.scala:46)
at io.gatling.core.check.extractor.jsonpath.JsonPathExtractors$$anonfun$1$$anon$1.apply(JsonPathExtractors.scala:59)
at io.gatling.core.check.extractor.jsonpath.JsonPathExtractors$$anonfun$1$$anon$1.apply(JsonPathExtractors.scala:56)
at io.gatling.core.check.CheckBase$$anonfun$check$3$$anonfun$apply$4.apply(Check.scala:65)
at io.gatling.core.check.CheckBase$$anonfun$check$3$$anonfun$apply$4.apply(Check.scala:64)
at io.gatling.core.validation.Success.flatMap(Validation.scala:28)
at io.gatling.core.check.CheckBase$$anonfun$check$3.apply(Check.scala:64)
at io.gatling.core.check.CheckBase$$anonfun$check$3.apply(Check.scala:63)
at io.gatling.core.validation.Success.flatMap(Validation.scala:28)
at io.gatling.core.check.CheckBase.check(Check.scala:63)
at io.gatling.http.check.HttpCheck.check(HttpCheck.scala:30)
at io.gatling.http.check.HttpCheck.check(HttpCheck.scala:29)
at io.gatling.core.check.Checks$$anonfun$check$1$$anonfun$apply$1.apply(Check.scala:30)
at io.gatling.core.check.Checks$$anonfun$check$1$$anonfun$apply$1.apply(Check.scala:30)
at io.gatling.core.validation.Success.flatMap(Validation.scala:28)
at io.gatling.core.check.Checks$$anonfun$check$1.apply(Check.scala:30)
at io.gatling.core.check.Checks$$anonfun$check$1.apply(Check.scala:29)
at scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:111)
at scala.collection.immutable.List.foldLeft(List.scala:84)
at io.gatling.core.check.Checks$.check(Check.scala:29)
at io.gatling.http.ahc.AsyncHandlerActor.checkAndProceed$1(AsyncHandlerActor.scala:162)
at io.gatling.http.ahc.AsyncHandlerActor.io$gatling$http$ahc$AsyncHandlerActor$$processResponse(AsyncHandlerActor.scala:175)
at io.gatling.http.ahc.AsyncHandlerActor$$anonfun$receive$1.applyOrElse(AsyncHandlerActor.scala:55)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:425)
at akka.actor.ActorCell.invoke(ActorCell.scala:386)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:230)
at akka.dispatch.Mailbox.run(Mailbox.scala:212)
at akka.dispatch.ForkJoinExecutorConfigurator$MailboxExecutionTask.exec(AbstractDispatcher.scala:506)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

I’ve written this test

exec(http(“add_product”)
.post("/Checkout")
.headers(headers_checkout)
.param(“Product”, code)
.check(jsonPath("$.success").saveAs(“canGoOn”)))

.pause(461 milliseconds)
.doIf("${canGoOn}", “true”){
// another tests
}

I’m sure the problem is with the jsonPath, but I don’t know what is causing this… This call returns a json like this: {success: true}
I’ve tried using exists and find functions, but the same error ocurred.

Can you help me with this?

Thanks in advance,

Augusto

2

Hi,

This looks like a Jayway bug.

This project is not really maintained anymore:

It’s in Scala, compiled against Scala 2.10, so it only works with Gatling 2. The good thing is that it’s twice faster.

I advice you upgrade to Gatling 2.

Cheers,

Stéphane

3

I'm using the version 2. How should I use this implementation (didn't find
in the docs)?

And is there any way to trace the response from my requests? And the
session?

Thanks,

4

Oh right, 2M3 still used jayway.
You can try your luck and upgrade to 0.9.1 that was released since: http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.jayway.jsonpath%22

Otherwise, you can try Gatling 2 snapshot: https://github.com/excilys/gatling/wiki/Continuous-Integration

5

Ok,

Thanks for the help.

I’m downloading it… The extractor name is jsonPath? Or it changed?

6

Still the same.

7

Hi againt.
I’ve just updated to the snapshot you’ve mentioned and I’m having some issues with my simulation…
It seems atOnce and whatever has been moved (or removed).
What should I import to use them?

Thanks,

Augusto

8

Just saw my IDE removed the Expression import…
The atOnce is not a problem anymore, but does the repeat changed?

9

atOnce is now atOnceUsers

repeat hasn’t changed, no

10

Does the whatever become dontValidate?

11

Yup.

12

almost all problems solved. I’m having an issue with the repeat

Error:(74, 13) type mismatch;
found : Integer
required: io.gatling.core.session.Session => io.gatling.core.validation.Validation[Int]
.repeat(count) {
^

13

What are your imports ?
They should look like these:

import io.gatling.core.Predef._
import io.gatling.http.Predef._
import io.gatling.jdbc.Predef._

import scala.concurrent.duration._

14

They are like this and the error persists

15

Are you using a Java “Integer”?
What does the declaration of “count” looks like?

16

I think thats the problem then…
val count = Integer.getInteger(“categoriesPerUser”, Random.nextInt(10) + 1)

Should I wrap this in a Int.box then?

17

val count:Int = Integer.getInteger(“categoriesPerUser”, Random.nextInt(10) + 1)

That should fix your issue then.

18

Thank you very much :slight_smile: