Metaspace OOM 是因为 Metaspace 没有进行过回收,Metaspace 回收的前提是 ClassLoader 关闭,而 JVM-SANDBOX 在 shutdown 时会关闭 ClassLoader。JVM-SANDBOX 中自定义的 ClassLoader 都是继承了 URLClassLoader,URLClassLoader 的关闭方法 官方介绍: How to Close a URLClassLoader?The URLClassLoader close() method...
通过javap -verbose Test.class命令反编译后的字节码文件内容如下: Constant pool:#1= Methodref#3.#12// java/lang/Object."<init>":()V#2=Class#13// com/classloading/Test#3=Class#14// java/lang/Object#4= Utf8 <init>#5= Utf8 ()V#6= Utf8 Code#7= Utf8 LineNumberTable#8= Utf8 main...
1 : 0) << is_final_shift) | ((change_to_virtual ? 1 : 0) << is_forced_virtual_shift), // 在接口中调用Object中定义的方法 method()->size_of_parameters()); set_f2_as_vfinal_method(method()); } else { // 执行这里的逻辑时,表示方法是非静态绑定的非final方法,需要动态分派,则vtab...
> loadClass(String className, String codebase)throwsClassNotFoundException, MalformedURLException {ClassLoaderparent=getContextClassLoader();ClassLoadercl=URLClassLoader.newInstance(getUrlArray(codebase), parent);returnloadClass(className, cl); } 修复 在8u112之后 在RegistryContext的decodeObject中做了判断...
Area:hotspot/runtime_argumentsSynopsis: Improve VM configuration file loading. This release contains changes to the default implicit loading of the .hotspot_compiler and .hotspotrc file. For existing deployments which rely on .hotspot_compiler (e.g. to exclude a method from hotspot compilation), ...
Think of it this way: By doing a get, you've not only violated encapsulation but have tightly coupled your class to the callee. When you violate encapsulation by exporting state, you are forced to also export the application logic needed to manage that state and hence violate DRY. So you...
The thread represented by this thread is forced to stop whatever it is doing abnormally and to throw a newly createdThreadDeathobject as an exception. It is permitted to stop a thread that has not yet been started. If the thread is eventually started, it immediately terminates. ...
and then I find that the class loader of the class that is forced to be transferred when the cache is not hit isorg.springframework.boot.devtools.restart.classloader, And the class loader after hitting the cache becomessun.misc.Launcher$AppClassLoader. It seems that the point of the problem...
A thread must spend as little time as possible holding a lock. The longer a lock is held, the greater the probability that another thread tries to obtain the lock and is forced to wait. Reducing the duration that a lock is held reduces the contention on the lock and allows the applicatio...
It's a java annotation on a class. PLUGIN = a container for EXTENSION POINTS and EXTENSIONS + lifecycle methods (start, stop, delete) A PLUGIN is similar with a MODULE from other systems. If you don't need lifecycle methods (hook methods for start, stop, delete) you are not forced to...