How to configure log4j properties for SpringJUnit4ClassRunner

Question

Suddenly this keeps happening during a JUnit test  Everything was working  I wrote some new tests and this error occured  If I revert it  it won t go away  Why is that   log4j WARN No appenders could be found for logger  org springframework test context junit4 SpringJUnit4ClassRunner   log4j WARN Please initialize the log4j system properly  log4j WARN See http   logging apache org log4j 1 2 faq html noconfig for more info

User · Accepted Answer

The new tests you wrote  directly or indirectly  use classes that log using Log4j   Log4J needs to be configured for this logging to work properly   Put a log4j properties  or log4j xml  file in the root of your test classpath   It should have some basic configuration such as    Set root logger level to DEBUG and its only appender to A1  log4j rootLogger DEBUG  A1    A1 is set to be a ConsoleAppender  log4j appender A1 org apache log4j ConsoleAppender    A1 uses PatternLayout  log4j appender A1 layout org apache log4j PatternLayout log4j appender A1 layout ConversionPattern  -4r   t   -5p  c  x -  m n    An alternative logging format    log4j appender stdout layout ConversionPattern  d yyyy-MM-dd HH mm ss   -5p  c 1  -  m n   An appender outputs to the console by default  but you can also explicitly set the target like this   log4j appender A1 Target System out   This will redirect all output in a nice format to the console  More info can be found here in the Log4J manual     Log4J Logging will then be properly configured and this warning will disappear

User · Answer

Because I don t like to have duplicate files  log4j properties in test and main   and I have quite many test classes  they each runwith SpringJUnit4ClassRunner class  so I have to customize it  This is what I use   import java io FileNotFoundException   import org junit runners model InitializationError  import org springframework test context junit4 SpringJUnit4ClassRunner  import org springframework util Log4jConfigurer   public class MySpringJUnit4ClassRunner extends SpringJUnit4ClassRunner        static           String log4jLocation    classpath log4j-oops properties           try               Log4jConfigurer initLogging log4jLocation             catch  FileNotFoundException ex                System err println  Cannot Initialize log4j at location      log4jLocation                        public MySpringJUnit4ClassRunner Class lt   gt  clazz  throws InitializationError           super clazz             When you use it  replace SpringJUnit4ClassRunner with MySpringJUnit4ClassRunner    RunWith MySpringJUnit4ClassRunner class    ContextConfiguration  classpath conf applicationContext xml    public class TestOrderController       private Logger LOG   LoggerFactory getLogger this getClass          private MockMvc mockMvc

User · Answer

If you don t want to bother with a file  you can do something like this in your code   static       Logger rootLogger   Logger getRootLogger        rootLogger setLevel Level INFO       rootLogger addAppender new ConsoleAppender                 new PatternLayout   -6r   p   c -  m n

User · Answer

I was using Maven in eclipse and I did not want to have an additional copy of the properties file in the root folder  You can do the following in eclipse    Open run dialog  click the little arrow next to the play button and go to run configurations  Go to the  classpath  tab  Select the  User Entries  and click the  Advanced  button on the right side   Now select the  Add External folder  radio button   Select the resources folder

User · Answer

Add a log4j properties log4j xml  file with at least one appender in root of your classpath   The contents of the file log4j properties  can be as simple as  log4j rootLogger WARN A1    A1 is set to be a ConsoleAppender  log4j appender A1 org apache log4j ConsoleAppender log4j appender A1 layout org apache log4j PatternLayout log4j appender A1 layout ConversionPattern  d ISO8601    t   -5p  c  x -  m n   This will enable log4j logging with default log level as WARN and use the java console to log the messages

User · Answer

I know this is old  but I was having trouble too  For Spring 3 using Maven and Eclipse  I needed to put the log4j xml in  src test resources for the Unit test to log properly  Placing in in the root of the test did not work for me  Hopefully this helps others

User · Answer

I have the log4j properties configured properly  That s not the problem  After a while I discovered that the problem was in Eclipse IDE which had an old build in   cache  and didn t create a new one  Maven dependecy problem   I had to build the project manually and now it works

[java] How to configure log4j.properties for SpringJUnit4ClassRunner?

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