Changing the embedded server in Grails 3

I have a pet project that I’ve written in Grails 3. I run it on an already-busy cloud server via the fat jar. I kept the default Tomcat configuration but soon I kept getting out of memory errors. I wanted to use something more lightweight. So I started looking how to change out Tomcat for something else in Grails 3, but I couldn’t find anything. But Grails 3 is just Spring Boot, right?

I found this page on in the Spring Boot docs about changing from Tomcat to Undertow. I’ve used Undertow before and I really liked it. The documentation didn’t quite match what I had in my build.gradle file but it was really pretty easy. I simply changed this line:

compile "org.springframework.boot:spring-boot-starter-tomcat"

 

to this:

compile "org.springframework.boot:spring-boot-starter-undertow"

 

And that was it — I recompiled and redeployed… and haven’t had a memory problem since. That was two months ago. The only difference I’ve seen is that dbconsole doesn’t work while running in development mode, but that’s not a big deal to me.

About the Author

Mike Hostetler profile.

Mike Hostetler

Principal Technologist

Mike has almost 20 years of experience in technology. He started in networking and Unix administration, and grew into technical support and QA testing. But he has always done some development on the side and decided a few years ago to pursue it full-time. His history of working with users gives Mike a unique perspective on writing software.

One thought on “Changing the embedded server in Grails 3

Leave a Reply

Your email address will not be published. Required fields are marked *

Related Blog Posts
Why we started using JSON Schema in our internal Helm charts
Helm 3 supports validating the provided chart values against a JSON Schema. While it may be quicker to get started in your chart development without a schema, we found it valuable for a number of […]
Rewriting files in Google Cloud Storage
Rewriting Files in GCP Note: even though this code is in Python, this should be the same idea in JavaScript, Go, etc. I wrote the following to copy a file from one Google Cloud Storage […]
Interpreting Spatial Data in the Age of COVID-19
As 2020 has come to an end, many are eager to leave the mess of COVID-19 behind with the new year and gain a fresh start. Unfortunately, new cases are still soaring across the United […]
Building a Better Mousetrap
Recently, my daughter (age 6) was into building “mousetraps” out of shoe boxes. These were more or less comfortable cardboard mouse houses complete with beds, rooms, everything a mouse could want or need and not […]