1. Increase the heap memory compiled by Maven
I used this method to modify it successfully
The JVM heap memory used during Maven compile can be adjusted by setting the MAVEN_OPTS environment variable.
Settings in IntelliJ IDEA:
Open the settings for IntelliJ IDEA (File -> Settings or Ctrl + Alt + S).
Navigate to Build, Execution, Deployment -> Build Tools -> Maven -> Runner.
In the VM Options field, add heap memory settings, for example:
-Xmx2048m -Xms1024m
- -Xmx2048m: Set the maximum heap memory to 2048 MB.
- -Xms1024m: Set the initial heap memory to 1024 MB.
Click Apply and rerun Maven compile.
Set on the command line:
If you use Maven on the command line, you can increase the heap memory by setting the MAVEN_OPTS environment variable:
export MAVEN_OPTS="-Xmx2048m -Xms1024m" mvn clean install
2. Increase the heap memory of IntelliJ IDEA
If IntelliJ IDEA itself has insufficient memory, it may also cause compilation failure. The heap memory of IDEA can be increased by following the steps below:
Find the IntelliJ IDEA configuration file:
Windows: (located in the bin folder of the IDEA installation directory).
macOS/Linux: (located in the bin folder of the IDEA installation directory).
Edit the file and add the following configuration:
-Xmx2048m -Xms1024m
Save the file and restart IntelliJ IDEA.
3. Optimize Maven Compilation
If the project is large, you can try to optimize the Maven compilation process to reduce memory usage:
Module compilation
If the project is multi-module, you can compile a module separately instead of compiling the entire project at once:
mvn clean install -pl module name -am
Skip the test
Tests can take up a lot of memory, and you can skip the tests at compile time:
mvn clean install -DskipTests
Use incremental compilation
In IntelliJ IDEA, enabling incremental compilation reduces the number of files per compile:
Open File -> Settings -> Build, Execution, Deployment -> Compiler.
Check Enable incremental compilation.
4. Check code and dependencies
Check the code: Make sure there are no memory leaks or unreasonable memory usage.
Reduce dependencies: Check, remove unnecessary dependencies.
Optimize resources: If there are a large number of resource files (such as images, configuration files, etc.) in the project, make sure they are not mistakenly included in the compilation process.
5. Adjust JVM parameters
If the above method still fails to solve the problem, you can try to adjust more JVM parameters, for example:
-XX:MaxMetaspaceSize: Increase the metaspace size.
-XX: ReservedCodeCacheSize: Increase the code cache size.
Example:
export MAVEN_OPTS="-Xmx2048m -Xms1024m -XX:MaxMetaspaceSize=512m -XX:ReservedCodeCacheSize=256m"
mvn clean install
6. Upgrade Maven and JDK
Make sure you are using the latest versions of Maven and JDK. Older versions may have memory management issues.
Summarize
Increasing the heap memory of Maven and IntelliJ IDEA is the most straightforward solution.
Optimizing the compilation process and project structure can reduce memory usage.
If the problem persists, check the code and dependencies to make sure there are no memory leaks or unreasonable memory usage.
Through the above method, the problem of : Java heap space should be solved.
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