vcjmhg commented on issue #4545:
URL: https://github.com/apache/skywalking/issues/4545#issuecomment-701920755
@wu-sheng ,Sir, I have a problem about this plugin.Users may be configure
more than one appender to collect logs , just like this:
```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>
```
From the above file, you can see that the user used two appenders with
different patterns to collect the same log. So I want to know when plugin add
error log to span log, should it add all error logs from the two appenders to
the span log or just one of them?
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