-verbose:gc -Xms20m -Xmx20m -XX: HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\dump
/**
* java 堆内存溢出
* <p>
* VM Args: -Xms20m -Xmx20m -XX: HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\dump
*
* @author yuhao.wang3
*/
public class HeapOutOfMemoryErrorTest {
public static void main(String[] args) throws InterruptedException {
// 模拟大容器
List<Object> list = Lists.newArrayList();
for (long i = 1; i > 0; i ) {
list.add(new Object());
if (i % 100_000 == 0) {
System.out.println(Thread.currentThread().getName() "::" i);
}
}
}
}
[GC (Allocation Failure) 5596K->1589K(19968K), 0.0422027 secs] main::100000 main::200000 [GC (Allocation Failure) 7221K->5476K(19968K), 0.0144103 secs] main::300000 [GC (Allocation Failure) 9190K->9195K(19968K), 0.0098252 secs] main::400000 main::500000 [Full GC (Ergonomics) 17992K->13471K(19968K), 0.3431052 secs] main::600000 main::700000 main::800000 [Full GC (Ergonomics) 17127K->16788K(19968K), 0.1581969 secs] [Full GC (Allocation Failure) 16788K->16758K(19968K), 0.1994445 secs] java.lang.OutOfMemoryError: Java heap space Dumping heap to D:\dump\java_pid7432.hprof ... Heap dump file created [28774262 bytes in 0.221 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:261) at java.util.ArrayList.ensureExplicitCapacity(ArrayList.java:235) at java.util.ArrayList.ensureCapacityInternal(ArrayList.java:227) at java.util.ArrayList.add(ArrayList.java:458) at com.xiaolyuh.HeapOutOfMemoryErrorTest.main(HeapOutOfMemoryErrorTest.java:23) Disconnected from the target VM, address: '127.0.0.1:61622', transport: 'socket'
[Full GC (Ergonomics) 19225K->19225K(19968K), 0.1044070 secs] [Full GC (Ergonomics) 19227K->19227K(19968K), 0.0684710 secs] java.lang.OutOfMemoryError: GC overhead limit exceeded Dumping heap to D:\dump\java_pid17556.hprof ... Heap dump file created [34925385 bytes in 0.132 secs] Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded [Full GC (Ergonomics) 19257K->933K(19968K), 0.0403569 secs] at com.xiaolyuh.HeapOutOfMemoryErrorTest.main(HeapOutOfMemoryErrorTest.java:25) ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2 JDWP exit error AGENT_ERROR_NO_JNI_ENV(183): [util.c:840]
Collections.unmodifiableList(
Collections.unmodifiableList(
Collections.unmodifiableList(
Collections.unmodifiableList(
Collections.unmodifiableList(
...)))))));
/**
* java 虚拟机栈和本地方法栈内存溢出测试
* <p>
* VM Args: -Xss128k
*
* @author yuhao.wang3
*/
public class StackOverflowErrorErrorTest {
private int stackLength = 0;
public void stackLeak() {
stackLength ;
stackLeak();
}
public static void main(String[] args) {
StackOverflowErrorErrorTest sof = new StackOverflowErrorErrorTest();
try {
sof.stackLeak();
} catch (Exception e) {
System.out.println(sof.stackLength);
e.printStackTrace();
}
}
}
stackLength::1372 java.lang.StackOverflowError at com.xiaolyuh.StackOverflowErrorErrorTest.stackLeak(StackOverflowErrorErrorTest.java:16) at com.xiaolyuh.StackOverflowErrorErrorTest.stackLeak(StackOverflowErrorErrorTest.java:16) at com.xiaolyuh.StackOverflowErrorErrorTest.stackLeak(StackOverflowErrorErrorTest.java:16) ...
stackLength::20641 java.lang.StackOverflowError at com.xiaolyuh.StackOverflowErrorErrorTest.stackLeak(StackOverflowErrorErrorTest.java:16) at com.xiaolyuh.StackOverflowErrorErrorTest.stackLeak(StackOverflowErrorErrorTest.java:16) ...
public void stackLeak(String ags1, String ags2, String ags3) {
stackLength ;
stackLeak(ags1, ags2, ags3);
}
stackLength::13154 java.lang.StackOverflowError at com.xiaolyuh.StackOverflowErrorErrorTest.stackLeak(StackOverflowErrorErrorTest.java:16) at com.xiaolyuh.StackOverflowErrorErrorTest.stackLeak(StackOverflowErrorErrorTest.java:16) ...
/**
* java 虚拟机栈和本地方法栈内存溢出测试
* <p>
* 创建线程过多导致内存溢出异常
* <p>
* VM Args: -verbose:gc -Xss20M -XX: HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\dump
*
* @author yuhao.wang3
* @since 2019/11/30 17:09
*/
public class StackOutOfMemoryErrorTest {
private static int threadCount;
public static void main(String[] args) throws Throwable {
try {
while (true) {
threadCount ;
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(1000 * 60 * 10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
} catch (Throwable e) {
e.printStackTrace();
throw e;
} finally {
System.out.println("threadCount=" threadCount);
}
}
}
java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:717) at StackOutOfMemoryErrorTest.main(StackOutOfMemoryErrorTest.java:17) threadCount=4131 Exception in thread "main" java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:717) at StackOutOfMemoryErrorTest.main(StackOutOfMemoryErrorTest.java:17)
/**
* java 元数据区域/方法区的内存溢出
* <p>
* VM Args JDK 1.6: set JAVA_OPTS=-verbose:gc -XX:PermSize=10m -XX:MaxPermSize=10m -XX: HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\dump
* <p>
* VM Args JDK 1.8: set JAVA_OPTS=-verbose:gc -Xmx20m -XX:MetaspaceSize=5m -XX:MaxMetaspaceSize=5m -XX: HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\dump
*
* @author yuhao.wang3
*/
public class MethodAreaOutOfMemoryErrorTest {
static class MethodAreaOOM {
}
public static void main(String[] args) {
while (true) {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(MethodAreaOOM.class);
enhancer.setCallback(new MethodInterceptor() {
@Override
public Object intercept(Object obj, Method method, Object[] params, MethodProxy proxy) throws Throwable {
return proxy.invokeSuper(obj, params);
}
});
enhancer.create();
}
}
}
[GC (Last ditch collection) 1283K->1283K(16384K), 0.0002585 secs] [Full GC (Last ditch collection) 1283K->1226K(19968K), 0.0075856 secs] java.lang.OutOfMemoryError: Metaspace Dumping heap to D:\dump\java_pid18364.hprof ... Heap dump file created [2479477 bytes in 0.015 secs] [GC (Metadata GC Threshold) 1450K->1354K(19968K), 0.0003906 secs] [Full GC (Metadata GC Threshold) 1354K->976K(19968K), 0.0073752 secs] [GC (Last ditch collection) 976K->976K(19968K), 0.0002921 secs] [Full GC (Last ditch collection) 976K->973K(19968K), 0.0045243 secs] Exception in thread "main" java.lang.OutOfMemoryError: Metaspace at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:52) at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34) at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116) at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291) at org.springframework.cglib.core.KeyFactory$Generator.create(KeyFactory.java:221) at org.springframework.cglib.core.KeyFactory.create(KeyFactory.java:174) at org.springframework.cglib.core.KeyFactory.create(KeyFactory.java:153) at org.springframework.cglib.proxy.Enhancer.<clinit>(Enhancer.java:73) at com.xiaolyuh.MethodAreaOutOfMemoryErrorTest.main(MethodAreaOutOfMemoryErrorTest.java:26)
/**
* java 方法区和运行时常量池溢出
* <p>
* VM Args JDK 1.6: set JAVA_OPTS=-verbose:gc -XX:PermSize10 -XX:MaxPermSize10m -XX: HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\dump
*
* @author yuhao.wang3
*/
public class RuntimeConstantOutOfMemoryErrorTest {
public static void main(String[] args) {
// 使用List保存着常量池的引用，避免Full GC 回收常量池行为
List<String> list = new ArrayList<>();
for (int i = 0; ; i ) {
list.add(String.valueOf(i).intern());
}
}
}
Exception in thread "main" java.lang.OutOfMemoryError: PermGen space
at java.lang.String.intern(Native Method)
at RuntimeConstantOutOfMemoryErrorTest.main(RuntimeConstantOutOfMemoryErrorTest.java:18)
/**
* java 直接内存溢出
* <p>
* VM Args JDK 1.6: set JAVA_OPTS=-verbose:gc -Xms20m -XX:MaxDirectMemorySize=10m -XX: HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=D:\dump
*
* @author yuhao.wang3
*/
public class DirectMemoryOutOfMemoryErrorTest {
public static void main(String[] args) throws IllegalAccessException {
int _1M = 1024 * 1024;
Field unsafeField = Unsafe.class.getDeclaredFields()[0];
unsafeField.setAccessible(true);
Unsafe unsafe = (Unsafe) unsafeField.get(null);
while (true) {
unsafe.allocateMemory(_1M);
}
}
}
Exception in thread "main" java.lang.OutOfMemoryError at sun.misc.Unsafe.allocateMemory(Native Method) at com.xiaolyuh.DirectMemoryOutOfMemoryErrorTest.main(DirectMemoryOutOfMemoryErrorTest.java:23)
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