Debugging Spring Configuration doesn't work

Question

I add Security problems in may Spring application so I wanted to debug Spring thru log4j.

Log4j is working because my services are logging debug information to the console. But Spring does not log anything to my console

Here is my log4j.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
    <appender name="CA" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d{MM/dd/yy - HH\:mm\:ss,SSS} [%t] %-5p %c %x - %m%n" />
        </layout>
    </appender>
    <logger name="org.springframework" additivity="false">
        <level value="DEBUG"/>
        <appender-ref ref="CA"/>
    </logger>   
    <logger name="com.test" additivity="false">
        <level value="INFO"/>
        <appender-ref ref="CA"/>
    </logger>
</log4j:configuration>

It is well taken into consideration as I so putting --Dlog4j.debug in my server start options. Result :

log4j: Preferred configurator class: org.apache.log4j.xml.DOMConfigurator
log4j: System property is :null
log4j: Standard DocumentBuilderFactory search succeded.
log4j: DocumentBuilderFactory is: org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
log4j: debug attribute= "null".
log4j: Ignoring debug attribute.
log4j: reset attribute= "false".
log4j: Threshold ="null".
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [org.springframework] additivity to [false].
log4j: Level value for org.springframework is  [DEBUG].
log4j: org.springframework level set to DEBUG
log4j: Class name: [org.apache.log4j.ConsoleAppender]
log4j: Parsing layout of class: "org.apache.log4j.PatternLayout"
log4j: Setting property [conversionPattern] to [%d{MM/dd/yy - HH:mm:ss,SSS} [%t] %-5p %c %x - %m%n].
log4j: Adding appender named [CA] to category [org.springframework].
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [com.test] additivity to [false].
log4j: Level value for com.testis  [INFO].
log4j: com.testlevel set to INFO
log4j: Adding appender named [CA] to category [com.test].
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: System property is :null
log4j: Standard DocumentBuilderFactory search succeded.
log4j: DocumentBuilderFactory is: org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
log4j: debug attribute= "null".
log4j: Ignoring debug attribute.
log4j: reset attribute= "false".
log4j: Threshold ="null".
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [org.springframework] additivity to [false].
log4j: Level value for org.springframework is  [DEBUG].
log4j: org.springframework level set to DEBUG
log4j: Class name: [org.apache.log4j.ConsoleAppender]
log4j: Parsing layout of class: "org.apache.log4j.PatternLayout"
log4j: Setting property [conversionPattern] to [%d{MM/dd/yy - HH:mm:ss,SSS} [%t] %-5p %c %x - %m%n].
log4j: Adding appender named [CA] to category [org.springframework].
log4j: Retreiving an instance of org.apache.log4j.Logger.
log4j: Setting [com.test] additivity to [false].
log4j: Level value for com.test is  [INFO].
log4j: com.test level set to INFO
log4j: Adding appender named [CA] to category [com.test].

I try to add this in my web.xml as said in this question

<context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>/WEB-INF/classes/log4j.xml</param-value>
</context-param>

<listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>

I used this debug in other application and I really didn't see the cause... Thanks for your help

Rydermark · Accepted Answer · 2016-01-15T17:33:39.520

I found it!

Using -Dorg.apache.commons.logging.diagnostics.dest=STDOUT you are able to debug commons-logging configuration.

I found that a jar in my dependencies (jcl-over-slf4j-1.5.8.jar) has a META-INF/services/org.apache.commons.logging.LogFactory that defines the logger to SLF4J.

So adding a -Dorg.apache.commons.logging.LogFactory=org.apache.commons.logging.impl.LogFactoryImpl, I restore the logger to be log4j.

Debugging Spring Configuration doesn't work

1 Answers1