VS Code Studio: ServerLauncher process using high CPU

Question

VS Code Studio: ServerLauncher process using high CPU

smunir opened this issue 3 years ago · comments

smunir commented 3 years ago

Opending JDL file in VS Code Studio launches ServerLauncher process which consumes almost 100% CPU.

To Reproduce
Steps to reproduce the behavior:

Install Jhipster extension in VS Code
Open JDL file
Check activity monitor for ServerLauncher process
Check that ServerLauncher process is consuming high CPU

Expected behavior
ServerLauncher should not consume this much CPU.

Screenshots

Desktop (please complete the following information):

OS: macOS Big Sur
Version: 11.2.1

Serano Colameo · Answer 1 · Wed Mar 24 2021 23:29:18 GMT+0800 (China Standard Time)

yes, sure, but after it has started it takes nearly no cpu power:

smunir · Answer 2 · Thu Mar 25 2021 01:26:27 GMT+0800 (China Standard Time)

It kinda gets stuck and doesn't start in my machine and keeps taking 101% CPU. I need to work on a JDL and my Mac is getting too hot because of this :-(

Any workaround would be great

Serano Colameo · Answer 3 · Thu Mar 25 2021 04:20:02 GMT+0800 (China Standard Time)

...hm, strange, which JDK version do you use?

you need a Java 11 JDK:

smunir · Answer 4 · Thu Mar 25 2021 06:12:42 GMT+0800 (China Standard Time)

I am using https://sdkman.io for managing JDK Installations and had value your pointed and java.home in settings.json set to /Users/shahzad/.sdkman/candidates/java/current. I updated this to /Users/shahzad/.sdkman/candidates/java/11.0.2-open and now I can't see ServerLauncher process in activity monitor. Even setting it back to /Users/shahzad/.sdkman/candidates/java/current didn't make any difference. Looks like just modifying settings.json solved this issue. I can see JDK Language Server started! in status bar, suggestions/templates are working fine, not sure what issues I could face but CPU and fan are happy now. Should I close the issue if we don't need to investigate absence of ServerLauncher in processes list?

Serano Colameo · Answer 5 · Thu Mar 25 2021 19:08:01 GMT+0800 (China Standard Time)

if you do not see the ServerLauncher process anymore then it's not working at all...

I am using java over sdkman on a macbook and have no problems.

Try this version: AdoptOpenJDK / 11.0.10.hs-adpt

smunir · Answer 6 · Thu Mar 25 2021 21:40:28 GMT+0800 (China Standard Time)

It started a few hours ago again with same CPU percentage. As you suggested I switched to AdoptOpenJDK / 11.0.10.hs-adpt and now it's started taking only 0.2% CPU. We can conclude that this was because of Open JDK. Thanks for your help.