StackOverFlow with gatling 2.2.0

Gatling (Open-Source)
1

Hi,

While writing a script to perform some SMTP with Gatling, I encountered a Stack overflow error.

I developped a custom protocol over the 2.2.0 to send eMails via SMTP.

If I run my scenario with I can run my scenario without trouble:

setUp(scn.inject(nothingFor(10 seconds), rampUsers(UserCount) over(10 seconds))).protocols(smtp)

However, if I use :

setUp(scn.inject(atOnceUsers(UserCount)))
  .maxDuration(3 minutes)
  .throttle(
    reachRps(UserCount) in (10 seconds),
    holdFor(3 minute))
  .protocols(smtp)

I get a StackOverFlowException with the following stack trace after ~ 40 seconds of tests (I selected the repeated part of it) :

    at org.apache.james.gatling.smtp.SmtpAction.execute(SmtpAction.scala:32)
    at io.gatling.core.action.Action$class.$bang(Action.scala:35)
    at org.apache.james.gatling.smtp.SmtpAction.io$gatling$core$action$ChainableAction$$super$$bang(SmtpAction.scala:14)
    at io.gatling.core.action.ChainableAction$class.$bang(Action.scala:60)
    at org.apache.james.gatling.smtp.SmtpAction.$bang(SmtpAction.scala:14)
    at io.gatling.core.action.InnerLoop.execute(Loop.scala:66)
    at io.gatling.core.action.Action$class.$bang(Action.scala:35)
    at io.gatling.core.action.InnerLoop.io$gatling$core$action$ChainableAction$$super$$bang(Loop.scala:41)
    at io.gatling.core.action.ChainableAction$class.$bang(Action.scala:60)
    at io.gatling.core.action.InnerLoop.$bang(Loop.scala:41)
    at io.gatling.core.action.Loop.io$gatling$core$action$Loop$$$anonfun$1(Loop.scala:38)
    at io.gatling.core.action.Loop.io$gatling$core$action$Loop$$$anonfun$1$adapted(Loop.scala:38)
    at io.gatling.core.action.ExitableAction$.exitOrElse(BlockExit.scala:125)
    at io.gatling.core.action.Loop.execute(Loop.scala:38)
    at io.gatling.core.action.Action$class.$bang(Action.scala:35)
    at io.gatling.core.action.Loop.$bang(Loop.scala:30)
    at org.apache.james.gatling.smtp.SmtpAction.execute(SmtpAction.scala:32)

I do not understand why the second secnario do not behave like the first one.

I attached SmtpAction to the post.

Regards,

Benoit Tellier

SmtpAction.scala (2.36 KB)

2

Honestly, no idea.
Have you tried upgrading to latest release (2.2.2) or master?

3

Did you ever get to the bottom of this?

I’d love to use Gatling to send SMTP - wondered if you’d got anywhere close to a reliable solution!?

Thanks,
Rob