[GitHub] [skywalking] SayMr commented on pull request #567: support for logback MDC

[GitBox <gi...@apache.org>]

SayMr commented on pull request #567:
URL: https://github.com/apache/skywalking/pull/567#issuecomment-646931122


   > * xml
   
   <!-- 按照每天生成日志文件 -->
       <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
           <file>${LOG_HOME}/${HOSTNAME}.log</file>
           <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
               <!--日志文件输出的文件名-->
               <FileNamePattern>${LOG_HOME}/${HOSTNAME}.%d{yyyy-MM-dd}.%i.log.gz</FileNamePattern>
           <MaxFileSize>256MB</MaxFileSize>
               <!--日志文件保留天数-->
               <MaxHistory>30</MaxHistory>
           </rollingPolicy>
           <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
               <layout class="org.skywalking.apm.toolkit.log.logback.v1.x.mdc.TraceIdMDCPatternLogbackLayout">
                   <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
                   <pattern>[%d{yyyy-MM-dd HH:mm:ss.SSS}] %X{tid}  [%thread] [%-5level] [%logger{50}]  [%msg] [%exception]</pattern>
               </layout>
           </encoder>
           <append>false</append>
           <prudent>false</prudent>
       </appender>
   
   logback.xml 配置成这样，server启动时报错，信息如下：
   020-06-20 10:42:29.112 ERROR 1 --- [ost-startStop-1] o.s.boot.SpringApplication               : Application startup fail
   ed
   java.lang.IllegalStateException: Logback configuration error detected:
   ERROR in ch.qos.logback.core.pattern.parser.Compiler@3d0234bf - There is no conversion class registered for conversion wo
   rd [tid]
   ERROR in ch.qos.logback.core.pattern.parser.Compiler@3d0234bf - [tid] is not a valid conversion word
   ERROR in ch.qos.logback.core.pattern.parser.Compiler@3270c078 - There is no conversion class registered for conversion wo
   rd [tid]
   ERROR in ch.qos.logback.core.pattern.parser.Compiler@3270c078 - [tid] is not a valid conversion word
   大神帮忙分析下


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