test/conf/logback-simulator.xml

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<configuration debug="false" scan="true" scanPeriod="60 seconds">
  <define name="cluster_id" class="org.apache.cassandra.distributed.impl.ClusterIDDefiner" />
  <define name="instance_id" class="org.apache.cassandra.distributed.impl.InstanceIDDefiner" />

  <!-- Shutdown hook ensures that async appender flushes -->
  <shutdownHook class="ch.qos.logback.core.hook.DelayingShutdownHook"/>

  <appender name="INSTANCEFILE" class="ch.qos.logback.core.FileAppender">
    <file>./build/test/logs/${cassandra.testtag}/${suitename}/${cluster_id}/${instance_id}/system.log</file>
    <encoder>
      <pattern>%-5level [%thread] ${instance_id} %date{ISO8601} %msg%n</pattern>
    </encoder>
    <immediateFlush>true</immediateFlush>
  </appender>

  <appender name="STDOUT" target="System.out" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%-5level [%thread] ${instance_id} %date{ISO8601} %F:%L - %msg%n</pattern>
    </encoder>
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
      <level>WARN</level>
    </filter>
  </appender>

  <logger name="org.apache.cassandra.locator.TokenMetadata" level="ERROR"/>
  <logger name="org.apache.cassandra.net.Message" level="ERROR"/>
  <logger name="org.reflections.Reflections" level="ERROR"/>
  <logger name="org.apache.hadoop" level="WARN"/>
  <logger name="org.apache.cassandra.utils.SigarLibrary" level="ERROR"/>
  <logger name="org.apache.cassandra.utils.FBUtilities" level="ERROR"/>
  <logger name="org.apache.cassandra.config.DatabaseDescriptor" level="ERROR"/>
  <logger name="org.apache.cassandra.service.StartupChecks" level="ERROR"/>
  <logger name="org.apache.cassandra.metrics.DecayingEstimatedHistogramReservoir" level="ERROR"/>
  <logger name="io.netty.handler.ssl.SslHandler" level="WARN"/>

  <root level="INFO">
    <appender-ref ref="INSTANCEFILE" />
    <appender-ref ref="STDOUT" />
  </root>
</configuration>