Allow to configure root logging level using system properties. Ex. -Des.logger.level=DEBUG . Defaults to INFO as before.

config/logging.yml

@@ -1,4 +1,6 @@
-rootLogger: INFO, console, file
+# you can override this using by setting a system property, for example -Des.logger.level=DEBUG
+es.logger.level: INFO
+rootLogger: ${es.logger.level}, console, file
 logger:
   # log action execution errors for easier debugging
   action: DEBUG

pom.xml

@@ -33,6 +33,7 @@
         <lucene.version>4.4.0</lucene.version>
         <tests.jvms>auto</tests.jvms>
         <tests.shuffle>true</tests.shuffle>
+        <es.logger.level>INFO</es.logger.level>
     </properties>
 
     <repositories>
@@ -389,6 +390,7 @@
                                 <es.transport.tcp.compress>${env.ES_TEST_COMPRESS}</es.transport.tcp.compress>
                                 <es.action.wait_on_mapping_change>${env.ES_WAIT_ON_MAPPING_CHANGE}
                                 </es.action.wait_on_mapping_change>
+                                <es.logger.level>${es.logger.level}</es.logger.level>
                                 <java.awt.headless>true</java.awt.headless>
                             </systemProperties>
                         </configuration>

src/test/resources/log4j.properties

@@ -1,4 +1,5 @@
-log4j.rootLogger=INFO, out
+es.logger.level=INFO
+log4j.rootLogger=${es.logger.level}, out
 
 log4j.appender.out=org.apache.log4j.ConsoleAppender
 log4j.appender.out.layout=org.apache.log4j.PatternLayout