vcjmhg edited a comment on issue #4545:
URL: https://github.com/apache/skywalking/issues/4545#issuecomment-702613662
As following logbak config file shows, the config file define two appenders
which has different pattern.If user want to colloct all of them , they may need
use multiple expressions.Of course,user can use "|" to instead it in one
regular expression .
```xml
<configuration>
<appender name="FILE" class="ch.qos.logback.core.FileAppender">
<file>myApp.log</file>
<encoder>
<pattern>%date %level [%thread] %logger{10} [%file:%line]
%msg%n</pattern>
</encoder>
</appender>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%msg%n</pattern>
</encoder>
</appender>
<root level="debug">
<appender-ref ref="FILE" />
<appender-ref ref="STDOUT" />
</root>
</configuration>
```
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