pg-yang commented on issue #8133:
URL: https://github.com/apache/skywalking/issues/8133#issuecomment-1188848135
I test jdk-http-scenario , It's right when use jdk8.
And use jdk18 will cause exception like :
```
ERROR 2022-07-19 17:21:34.678 http-nio-8081-exec-2
org.apache.skywalking.apm.plugin.jdk.http.HttpClientWriteRequestInterceptor_internal
: class[class sun.net.www.http.HttpClient] before method[writeRequests]
intercept failure
java.lang.IllegalAccessError: class
org.apache.skywalking.apm.plugin.jdk.http.HttpClientWriteRequestInterceptor (in
unnamed module @0x68149c35) cannot access class sun.net.www.MessageHeader (in
module java.base) because module java.base does not export sun.net.www to
unnamed module @0x68149c35
at
org.apache.skywalking.apm.plugin.jdk.http.HttpClientWriteRequestInterceptor.beforeMethod(HttpClientWriteRequestInterceptor.java:44)
at
org.apache.skywalking.apm.plugin.jdk.http.HttpClientWriteRequestInterceptor_internal.intercept(InstanceMethodInterTemplate.java:74)
at java.base/sun.net.www.http.HttpClient.writeRequests(HttpClient.java)
at
java.base/sun.net.www.http.HttpClient.writeRequests(HttpClient.java:703)
at
java.base/sun.net.www.protocol.http.HttpURLConnection.writeRequests(HttpURLConnection.java:747)
at
java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1686)
at
java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1589)
at
java.base/java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:529)
at
org.apache.skywalking.apm.testcase.jdkhttp.controller.CaseController.testcase(CaseController.java:46)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
at
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
at
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
at
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039)
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
at
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
```
I think it's module problem from java 9+ (HttpClientWriteRequestInterceptor
depended on sun.net.www.MessageHeader), And it might resolved by :
1. User can add jvm option: `--add-exports
java.base/sun.net.www=ALL-UNNAMED` , And is there other way to export
java.base/sun.net.www module programmatically(I'm not good at java9 module )
2. not use `sun.net.www.MessageHeader ` in
`HttpClientWriteRequestInterceptor `, We should find other way to implement
`jdk-http-plugin`
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