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Posted to notifications@skywalking.apache.org by GitBox <gi...@apache.org> on 2019/04/05 11:57:21 UTC
[GitHub] [incubator-skywalking] deepakgoenka opened a new issue #2453:
Classloading issues with custom plugin
deepakgoenka opened a new issue #2453: Classloading issues with custom plugin
URL: https://github.com/apache/incubator-skywalking/issues/2453
Please answer these questions before submitting your issue.
- Why do you submit this issue?
- [X ] Question or discussion
- [ ] Bug
- [ ] Requirement
- [ ] Feature or performance improvement
___
### Question
- What do you want to know?
I created a new plugin for my product but while starting my server, i get some class not found errors
I have followed the steps properly to create the plugin.
Plz guide me as i feel i have missed some steps.
Here is the stack trace.
ERROR 2019-04-05 16:28:19:363 SkyWalkingAgent : Enhance class com.is.interceptor.HTTPInterceptorTestImpl error.
org.apache.skywalking.apm.agent.core.plugin.PluginException: Can't create InstanceMethodsAroundInterceptor.
at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstMethodsInter.<init>(InstMethodsInter.java:57)
at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassEnhancePluginDefine.enhanceInstance(ClassEnhancePluginDefine.java:166)
at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.ClassEnhancePluginDefine.enhance(ClassEnhancePluginDefine.java:75)
at org.apache.skywalking.apm.agent.core.plugin.AbstractClassEnhancePluginDefine.define(AbstractClassEnhancePluginDefine.java:76)
at org.apache.skywalking.apm.agent.SkyWalkingAgent$Transformer.transform(SkyWalkingAgent.java:116)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Transformer$Compound.transform(AgentBuilder.java:2570)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$Transformation$Simple$Resolution.apply(AgentBuilder.java:10036)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.doTransform(AgentBuilder.java:10461)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.transform(AgentBuilder.java:10424)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.access$1500(AgentBuilder.java:10190)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$LegacyVmDispatcher.run(AgentBuilder.java:10799)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer$LegacyVmDispatcher.run(AgentBuilder.java:10746)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.skywalking.apm.dependencies.net.bytebuddy.agent.builder.AgentBuilder$Default$ExecutingTransformer.transform(AgentBuilder.java:10347)
at sun.instrument.TransformerManager.transform(TransformerManager.java:188)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:428)
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:468)
at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.is.interceptor.HttpInterceptorManager.init(HttpInterceptorManager.java:56)
at com.app.b2b.server.Server.run(Server.java:667)
Caused by: java.lang.NoClassDefFoundError: org/apache/skywalking/apm/agent/core/plugin/interceptor/enhance/InstanceMethodsAroundInterceptor
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.findClass(AgentClassLoader.java:146)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.skywalking.apm.agent.core.plugin.loader.InterceptorInstanceLoader.load(InterceptorInstanceLoader.java:77)
at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstMethodsInter.<init>(InstMethodsInter.java:55)
... 30 more
Caused by: java.lang.ClassNotFoundException: Can't find org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor
at org.apache.skywalking.apm.agent.core.plugin.loader.AgentClassLoader.findClass(AgentClassLoader.java:154)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 40 more
___
### Bug
- Which version of SkyWalking, OS and JRE?
- Which company or project?
- What happen?
If possible, provide a way for reproducing the error. e.g. demo application, component version.
___
### Requirement or improvement
- Please describe about your requirements or improvement suggestions.
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