[GitHub] ASCE1885 commented on issue #1997: Print traceId to log4j2 failed

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ASCE1885 commented on issue #1997: Print traceId to log4j2 failed
URL: https://github.com/apache/incubator-skywalking/issues/1997#issuecomment-444747585
 
 
   @wu-sheng I enhanced `org.apache.logging.log4j.ThreadContext`  and intercept method `getImmutableContext` and `getContext`,before this two method called,I printed `traceid` to mdc. In this way,it both supports sync and async mode of log4j2.
   
   ```java
   @Override
   public void beforeMethod(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes, MethodInterceptResult result) {
           ThreadContext.put("SW-", "TID:" + ContextManager.getGlobalTraceId());
   }
   ```

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