Minimal working example?

[io7m]

Hello!

The documentation is pretty extensive, but at no point does it appear to give a simple working example that will print JSON-formatted messages to the console including MDC and stack traces. I have this logback.xml configuration:

<?xml version="1.0" encoding="UTF-8" ?>

<configuration>

  <appender name="JsonConsoleAppender" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="net.logstash.logback.encoder.LogstashEncoder"/>
  </appender>

  <root level="TRACE">
    <appender-ref ref="JsonConsoleAppender"/>
  </root>

</configuration>

It results in no MDC being logged, and no stack traces when exceptions are included in a call such as:

Exception e;
LOG.debug("Something failed: ", e);

This contradicts the documentation, which says:

stack_trace: (Only if a throwable was logged) The stacktrace of the throwable. Stackframes are separated by line endings.

And:

By default, LogstashEncoder/LogstashLayout will write each [Mapped Diagnostic Context (MDC) (org.slf4j.MDC)](https://www.slf4j.org/api/org/slf4j/MDC.html) entry to the output.

It doesn't do this.

I'm using these versions, if it matters:

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-bom</artifactId>
  <version>2.0.17</version>
  <scope>import</scope>
  <type>pom</type>
</dependency>
<dependency>
  <groupId>ch.qos.logback</groupId>
  <artifactId>logback-classic</artifactId>
  <version>1.5.18</version>
</dependency>
<dependency>
  <groupId>net.logstash.logback</groupId>
  <artifactId>logstash-logback-encoder</artifactId>
  <version>8.0</version>
</dependency>

[io7m]

I don't know why this wasn't working, but it is now working.