image
代码如下：
public class HeapOOM {
/**
* VM Args: -Xms20m -Xmx20m -XX:+HeapDumpOnOutOfMemoryError
*/
public static void main(String[] args) {
List<Object> list = new ArrayList<>();
while (true) {
list.add(new Object());
}
}
}
执行后
java.lang.OutOfMemoryError: Java heap space
Dumping heap to java_pid12224.hprof ...
Heap dump file created [28186187 bytes in 0.087 secs]
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3210)
at java.util.Arrays.copyOf(Arrays.java:3181)
at java.util.ArrayList.grow(ArrayList.java:265)
at java.util.ArrayList.ensureExplicitCapacity(ArrayList.java:239)
at java.util.ArrayList.ensureCapacityInternal(ArrayList.java:231)
at java.util.ArrayList.add(ArrayList.java:462)
at com.guihuo.core.jvm.oom.HeapOOM.main(HeapOOM.java:24)
