I use OpenJDK 17 with Maven Wrapper 3.8.2 from Spring Initializr (Maven project, JAR packaging, Java 17, Spring Boot 2.6.0). No additional dependencies.
user@DESKTOP-U2OU5HG MINGW64 /c/Projects/my-project (master) $ java -version openjdk version "17" 2021-09-14 OpenJDK Runtime Environment (build 17+35-2724) OpenJDK 64-Bit Server VM (build 17+35-2724, mixed mode, sharing)
Upon running any of ./mvnw.cmd -version or ./mvnw.cmd clean install, I always get the following message:
Unrecognized VM option 'MaxPermSize=512m' Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.
Switching to OpenJDK 16.0.2 resolves the issue, however, I need to work with Java 17.
How to get it run? There is nowhere MaxPermSize=512m set.
Indeed -XX:MaxPermSize=size is labelled as follows according to Java® Development Kit Version 16/17 Tool Specifications (see the links):
The Maven Wrapper in the mvnw.cmd script, however, aside from the required JAVA_HOME, uses also a bunch of optional environment variables such as M2_HOME and these starting with MAVEN_ prefix.
The important one is MAVEN_OPTS where such a removed Java option can appear causing the inability to start the JVM on the newer version. In my case, I had something like:
MAVEN_OPTS="-Xmx4g -XX:MaxPermSize=512m -Dfile.encoding=UTF-8 -Djavax.xml.accessExternalSchema=all"
The solution is either to remove the option from the environment variables or add this line to the Maven Wrapper script to override the MAVEN_OPTS value, In the minimal form:
MAVEN_OPTS=