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javassit linkage error spring Exception when running application on WebSphere with java 8과 관련된 몇 가지 질문을 게시했습니다. 이제이 주제와 오류를 둘러싼 연구를 통해 Javassist로 바이트 코드 조작에 대한 유용한 정보를 얻었습니다. 난에 작업을 수행하려 할 때 참고로링크 오류를 해결하기 위해 Javassist로 바이트 코드 조작을 수행하는 방법은 무엇입니까?
는
[10/13/17 ] 00000089 webapp E com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E: [Servlet Error]-[weblge]: java.lang.ExceptionInInitializerError
at java.lang.J9VMInternals.ensureError(J9VMInternals.java:134)
at java.lang.J9VMInternals.recordInitializationFailure(J9VMInternals.java:123)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:83)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:57)
at java.lang.reflect.Constructor.newInstance(Constructor.java:437)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:120)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:345)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:278)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1826)
at com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:442)
at com.ibm.ws.webcontainer.webapp.WebGroupImpl.addWebApplication(WebGroupImpl.java:88)
at com.ibm.ws.webcontainer.VirtualHostImpl.addWebApplication(VirtualHostImpl.java:171)
at com.ibm.ws.webcontainer.WSWebContainer.addWebApp(WSWebContainer.java:904)
at com.ibm.ws.webcontainer.WSWebContainer.addWebApplication(WSWebContainer.java:789)
at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:427)
at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:719)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1247)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1514)
at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:704)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:1096)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:799)
at com.ibm.ws.runtime.component.ApplicationMgrImpl$5.run(ApplicationMgrImpl.java:2315)
at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:5488)
at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:5614)
at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2320)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:436)
at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:379)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.access$500(CompositionUnitMgrImpl.java:127)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl$CUInitializer.run(CompositionUnitMgrImpl.java:985)
at com.ibm.wsspi.runtime.component.WsComponentImpl$_AsynchInitializer.run(WsComponentImpl.java:524)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1909)
Caused by: java.lang.IllegalStateException: javassist.CannotCompileException: by java.lang.LinkageError: org.springframework.aop.framework.ProxyCreatorSupport
at org.springframework.aop.framework.JavassistApplicationContext.<clinit>(JavassistApplicationContext.java:36)
... 34 more
Caused by: javassist.CannotCompileException: by java.lang.LinkageError: org.springframework.aop.framework.ProxyCreatorSupport
at javassist.ClassPool.toClass(ClassPool.java:1170)
at javassist.ClassPool.toClass(ClassPool.java:1113)
at javassist.ClassPool.toClass(ClassPool.java:1071)
at javassist.CtClass.toClass(CtClass.java:1275)
at org.springframework.aop.framework.JavassistApplicationContext.<clinit>(JavassistApplicationContext.java:34)
... 34 more
Caused by: java.lang.LinkageError: org.springframework.aop.framework.ProxyCreatorSupport
at java.lang.ClassLoader.defineClassImpl(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:357)
at java.lang.ClassLoader.defineClass(ClassLoader.java:293)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:508)
at javassist.ClassPool.toClass2(ClassPool.java:1183)
at javassist.ClassPool.toClass(ClassPool.java:1164)
... 38 more
그리고 난이 자바 파일이 오류를 얻고있다 (이미 여기에 또 다른 질문이 스택 트레이스를 게시) org.springframework.aop.framework.ProxyCreatorSupport
package org.spring.aop.framework;
import javassist.ClassPool;
import javassist.CtClass;
import javassist.CtConstructor;
import javassist.LoaderClassPath;
import org.springframework.web.context.support.XmlWebApplicationContext;
public class JavassistApplicationContext extends XmlWebApplicationContext {
static {
ClassPool classPool = ClassPool.getDefault();
try {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
classPool.appendClassPath(new LoaderClassPath(classLoader));
CtClass cc = classPool.get("org.spring.aop.framework.ProxyCreatorSupport");
CtConstructor c = cc.getConstructors()[0];
c.insertAfter("$0.aopProxyFactory = new org.spring.aop.framework.JavassistAopProxyFactory();");
cc.toClass();
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
}
이 있는데,이 예외가 발생합니다. 이 예외를 해결하고 동일한 오류가 발생하는 경우 WebSphere에서 다른 클래스 로더 메소드를 시도했습니다.
이제이 오류를 해결할 수있는 linkage problem is occur when tries to modify the class already loaded by referenced classloader .을 이해했습니다. 나는 should unload the class first from the reference classloader으로 생각합니다. 어렵다고 생각합니다.
- 그래서 내가 생각하는 유일한 방법은 어떤 클래스 로더에 의해 클래스 로더 전에 바이트 코드 조작의 구현으로 해결할 수 있습니다. 그렇지 않아?
- Java 에이전트로 기존 코드를 바이트 코드 조작으로 변경하는 방법은 무엇입니까? 어떤 생각이나 제안? 중복 된 질문으로 생각하지 마십시오. 이것은 이전 질문의 참고 작업 일뿐입니다.
의견이 있으십니까? –