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[帮助文档] Dataphin管道任务同步数据报错java.lang.OutOfMemoryError:Compressedclassspace

问题描述用户使用管道任务同步数据时报错“java.lang.OutOfMemoryError: Compressed class space”。问题原因管道任务运行过程中压缩类空间溢出，默认大小1GB。解决方案创建一个shell任务，内容如下：@required_resource{required_...

[帮助文档] QuickBI仪表板报错:"INTERNAL:java.sql.SQLExpectionCannottransformODPS-SDKjavaclassjava.utll.ArrayListtolong"

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浅析java中ClassLoader如何加载Class

ClassLoader是一个经常出现又让很多人望而却步的词。本文试图以最浅显易懂的方式来讲解ClassLoader,希望不对该机制了解的朋友能起一点点作用。首先来说，要了解ClassLoader，就要知道它是用来做什么的，顾名思义，他就是用来加载Class文...

【java JVM】JVM中类的加载，加载class文件的原理机制

暂时贴图一张，以后补充解释： 1.符号引用替换为直接引用【参考：http://blog.csdn.net/maerdym/article/details/8087620】在java中，一个java类将会编译成一个class文件。在编译时，java类并不知道...

打扰大家一下，请教一个技术问题，就是我这边做java线上代码热更新的功能，自定义classloader ，系统启动的时候会把所有的类都加载，然后我这变在程序运行期间修改某个类，然后通过自定义的classloader 去重加加载这个修改的类，自定义的classloader ，重新覆写了Class findClass(String name) throws ClassNotFoundException 发放，然后就是每次调用这个方法的时候，都是从新读写最新的.class 文件字节流，但是重新加载还是

本问题及下方已被采纳的回答均来自云栖社区【阿里Java技术进阶2群】。https://yq.aliyun.com/articles/690084 点击链接欢迎加入社区大社群。

常见Java面试题之JVM加载class文件的原理机制

JVM加载class文件的原理机制JVM中类的装载是由类加载器（ClassLoader）和它的子类来实现的，Java中的类加载器是一个重要的Java运行时系统组件，它负责在运行时查找和装入类文件中的类。由于Java的跨平台性，经过编译的Java源程序并不是一个可执行程序，而是一个或多个类文件。当Ja...

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