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• 使用 maven 和 gradle 依赖相应的工具包

   <dependency>
      <groupId>org.skywalking</groupId>
      <artifactId>apm-toolkit-log4j-1.x</artifactId>
      <version>{project.release.version}</version>
   </dependency>

   

• 配置layout

log4j.appender.CONSOLE.layout=org.skywalking.apm.toolkit.log.log4j.v1.x.TraceIdPatternLayout

• 在layout.ConversionPattern中设置 %T来展示traceid ( 在 2.0-2016版本中, 你应该设置为 %x, 为什么改变配置，请参考相关issue? )

log4j.appender.CONSOLE.layout.ConversionPattern=%d [%T] %-5p %c{1}:%L - %m%n

• 当你使用-javaagent参数激活sky-walking的探针, 如果当前上下文中存在traceid，log4j将在输出traceId。如果探针没有被激活，将输出TID: N/A.