How do I set the JVM properties of an executable Spring Boot jarfile?

Question

As a follow-up question to How do I build a Spring Boot jarfile that systemd can execute directly as a service?, how do I set the JVM properties of an executable Spring Boot jarfile? For example, how do I set the maximum heap size (i.e. -Xmx2048m)?

see this http://stackoverflow.com/questions/23072187/how-to-configure-heap-size-when-start-a-spring-boot-application-with-embedded-to?rq=1 — Saravana, Nov 30 '16 at 16:42
@Saravana, that question doesn't apply because my application doesn't use embedded Tomcat. — Derek Mahar, Nov 30 '16 at 16:48

score 2 · Answer 1 · answered Nov 30 '16 at 17:04

2

Place your-app.conf next to your-app.jar with content

JAVA_OPTS=-Xmx2048M

answered Nov 30 '16 at 17:04

tan9

score 1 · Answer 2 · edited May 23 '17 at 12:01

This is not a direct answer to your question, but a way how to work around.

I have never opted for an executable jar since I believe it's more flexible to set the parameters from outside at app startup.

This is how to set JVM system properties and application properties via command line:

java -Xmx2048m -jar application.jar --paramname="paramvalue"

You can then get the parameter paramname in a Spring Bean or Service like this:

@Value("${paramname}")
private String paramname;

You can read more about that topic here:

Edit

Take a look at this answer which seems to be what you're looking for:

score 0 · Answer 3 · edited May 23 '17 at 12:13

0

According to 1, one can set JVM properties in environment variable _JAVA_OPTIONS.
According to 2, environment variable JAVA_TOOL_OPTIONS also sets the JVM properties.

edited May 23 '17 at 12:13

Community

answered Nov 30 '16 at 16:52

Derek Mahar

3 Answers3