I had an issue with some long test. The test had an OOM when the report was being calculated. I’m using Gatling 2.1.6 with maven (note that it worked fine in Gatling 2.0.0).
Downloading gatling bundle, then using gatling.sh script, increasing the heap memory and using the -ro option worked fine, but I have two questions:
1- Is it possible to get the report using maven? I’ve been trying using gatling.reportsOnly and/or gatling.resultsFolder with different options (i.e: mvn gatling:execute -Dgatling.reportsOnly=testname-timestamp) but it is always asking to specify the simulation class and if I put a simulation class it just execute the test instead of getting the report.
2- How can I increase the heap using the maven plugin to avoid the OOM in next executions? Should I use: gatling.gatlingJvmArgs? if yes, I’m seeing that by default it has many other args, should I specify all of them to override the one I want or just passing the -Xmx will work overriding the proper parameter?
1- Is it possible to get the report using maven? I've been trying using
gatling.reportsOnly and/or gatling.resultsFolder with different options
(i.e: mvn gatling:execute -Dgatling.reportsOnly=testname-timestamp) but it
is always asking to specify the simulation class and if I put a simulation
class it just execute the test instead of getting the report.
In 2.1, you have to pass the simulationClass too, because Gatling needs it
to fetch the assertions. You'll no longer have to in 2.2.
mvn gatling:execute -Dgatling.ro=mysimualtion-1436991042135
-Dgatling.sc=MySimulation
2- How can I increase the heap using the maven plugin to avoid the OOM in
next executions? Should I use: gatling.gatlingJvmArgs? if yes, I'm seeing
that by default it has many other args, should I specify all of them to
override the one I want or just passing the -Xmx will work overriding the
proper parameter?
Well, give it a try 
In 2.1, you have to pass the simulationClass too, because Gatling needs it to fetch the assertions. You’ll no longer have to in 2.2.
mvn gatling:execute -Dgatling.ro=mysimualtion-1436991042135 -Dgatling.sc=MySimulation
I did: mvn gatling:execute -Dgatling.reportsOnly=mysimulation-1436554579192 -Dgatling.simulationClass=MySimulation
but the problem is that it run the simulation and it doesn’t make the report. Also I’ve played a bit with gatling.resultsFolder just in case the folder is not found, but I couldn’t make it work
Which version of the maven plugin do you use?
It works as expected for me with 2.1.6.
yup, I’m using maven plugin 2.1.6. Not sure what’s wrong here. I’m thinking that perhaps for some reason the folder is not found so it executes the test? I’ll continue investigating. Thanks for the help
The demo worked fine and it was helpful to find the issue I had:
For some reason in the gatling.conf file I had the line: reportsOnly = “”
Commenting out that line solved the problem.
Thanks for the help!
Fun!
Glad you finally found it!