I have a use case where I want to make sure that a Java process exits with code 137 in case of OOM issues.
Here some experimentations I did:
public static void main(String[] args) {
List<byte[]> arr = new ArrayList<>();
while(true) {
arr.add(new byte[4096]);
}
}
MacOs result:
java oom.java
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at Main.main(oom.java:21)
echo $?
1
So it seemed clear that the JVM answers with exit code 1 in the case of OOM.
So I tried:
public static void main(String[] args) {
List<byte[]> arr = new ArrayList<>();
try {
while(true) {
arr.add(new byte[4096]);
}
} catch (OutOfMemoryError outOfMemoryError) {
System.exit(137);
}
}
Which gave the same result.
And this option: -XX:+ExitOnOutOfMemoryError which gave exit code 3.
Why System.exit(137) is being ignored? Anyway to achieve that?