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example-spring-boot

This is an example of Spring Boot Getting Started modified to work on OpenJDK CRaC, which consists only in using Spring Boot 3.2+ and adding the org.crac:crac dependency (version 1.4.0 or later).

Building

Use Maven to build

./mvnw package

Running

Please refer to README for details.

If you see an error, you may have to update your criu permissions with

sudo chown root:root $JAVA_HOME/lib/criu
sudo chmod u+s $JAVA_HOME/lib/criu

Preparing the image

  1. Run the JDK in the checkpoint mode
$JAVA_HOME/bin/java -XX:CRaCCheckpointTo=cr -jar target/example-spring-boot-0.0.1-SNAPSHOT.jar
  1. Warm-up the instance
siege -c 1 -r 100000 -b http://localhost:8080
  1. Request checkpoint
jcmd target/example-spring-boot-0.0.1-SNAPSHOT.jar JDK.checkpoint

Restoring

$JAVA_HOME/bin/java -XX:CRaCRestoreFrom=cr

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