process is not allowed to run in parallel

Hello Matthew,

The default behavior was changed to "single instance only" for run configurations in 2018.3. Could you please enable Allow running in parallel option in the corresponding run configuration?

That fixed it, Yaroslav. Thank you. Question: Why the change?

Matthew,

It was done due this discussion: https://youtrack.jetbrains.com/issue/IDEA-98563

Hi,

I am running an application on Tomcat and have the same problem. But I don't see the option "Allow running in parallel" in run/debug configurations. Should I find it somewhere else for tomcat?

Thank you

Hello,

It's a natural behavior of an application server run configuration. Even if you were allowed to start Tomcat run configuration twice, the server itself would not start for the second time since HTTP/JMX port would be already occupied by the first instance.

The second run configuration for the same application server but with different port numbers always should be configured to have 2 servers running at the same time.

Clicking "Run" should invoke "Update" action, but there is known issue with it: https://youtrack.jetbrains.com/issue/IDEA-203047

Oh okay, I didn't realize. It's a very annoying problem though.

We'll try to provide fix as soon as possible.

Thanks for the clarifications, I was also wondering about this behaviour. 
I also don't understand why this was changed, I'm very much used to having same run configurations, especially tests, run in parallel. 

So other people were complaining that all run configurations by default should be singleton. But I guess it was never surveyed, how many people are opposed to such a behaviour. Maybe a project or IDE-wide setting for a default value would be nicer instead of forcing such a behaviour on the user.

Echoing Michaela above: Running Tomcat, where can I find the option to allow running in parallel?

This had become a major block for our project so I reverted to the previous (Nov 21) version. Not planning to upgrade until I know for a fact this is fixed.

Unfortunately, reverting to 18.3 and restarting the machine didn't help. It looks like the damage is deeper. Any ideas?

Revert to 2018.2.x from https://www.jetbrains.com/idea/download/previous.html or use the Update action: https://www.jetbrains.com/help/idea/updating-applications-on-application-servers.html until the fix is released.

Reverting to 2018.2, as Serge suggested, solved the problem for me. Support was really fast and I was back in business the same day; thanks, Serge! :)

I haven't updated IDEA for a while for fear of re-introducing this issue. Does anyone know if this has been fixed in latest releases?

This issue was resolved and should not affect current IntelliJ IDEA version.

Just upgraded and it seems to be working like a charm. Thanks!

It still affects the newest version of IntelliJ on Manjaro (Arch Linux)...

Magne, please provide more details. Did you enable Allow running in parallel option? Or do you have some different problem?

It works now after enabling the parallel running option.

Hi I had encountered the same problem when I was trying to run parallel tests for JavaScript / TypeScript with Jest.

Contradictory to the documentation specified in the help page, I could not see the common option "Allow running in parallel" when I opened the "Run/Debug Configuration" dialog (could only see the "Share" option which did not solve the problem even when checked).

Version: IntelliJ IDEA 2019.1 (Ultimate Edition) Build #IU-191.6183.87, built on March 27, 2019

Any information / help would be appreciated. Thanks.

Jest configuration type is SINGLE_INSTANCE_ONLY, there is no way to run several Jest configurations in parallel. Why do you need running several instances concurrently?

Can't find the "Allow Running in Parallel" option in the Application template Run/Debug Configuration. 

Modify options | Allow multiple instances:

Alright, Thank You!

I don't see "Modify options" either. What's going on?

Hello @...,

Are you able to access them via Alt + M? Try to temporarily disable all third-party plugins.

If the problem remains please contact our support team at https://intellij-support.jetbrains.com/hc/en-us/requests/new , and provide the IDE logs. (Help | Collect Logs and Diagnostic Data)