Hi!

I have a web service with log4j configuration outside of the war file. Loggin to a file using org.apache.log4j.DailyRollingFileAppender works fine, but switching to a org.apache.log4j.ConsoleAppender causes everything to freeze while using 100% CPU. This is our setup:

pom.xml

<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.16</version>
  <exclusions>
    <exclusion>
      <groupId>javax.mail</groupId>
      <artifactId>mail</artifactId>
    </exclusion>
    <exclusion>
      <groupId>javax.jms</groupId>
      <artifactId>jms</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>1.6.1</version>
</dependency>
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>jcl-over-slf4j</artifactId>
  <version>1.6.1</version>
</dependency>
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>1.6.1</version>
</dependency>
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>jul-to-slf4j</artifactId>
  <version>1.6.1</version>
</dependency>

jboss-deployment-structure.xml

<jboss-deployment-structure>
  <deployment>
    <dependencies>
      ...
    </dependencies>
    <exclusions>
      <module name="org.apache.log4j"/>
      <module name="org.slf4j"/>
      <module name="org.slf4j.jcl-over-slf4j"/>
    </exclusions>
  </deployment>
</jboss-deployment-structure>

web.xml

<display-name>my-service-${version}</display-name>

<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<listener>
  <!-- Extends org.springframework.web.util.Log4jConfigListener, exports display-name as system property "webapp-name"  -->
  <listener-class>com.myservice.log.Log4jConfigListener</listener-class>
</listener>

<context-param>
  <param-name>log4jConfigLocation</param-name>
  <param-value>file:${settings.home}/my-service-logging-${version}.xml</param-value>
</context-param>

my-service-logging-1.0-SNAPSHOT.xml in C:\settings\ ("settings.home")

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <!-- APPENDERS -->
  <appender name="ConsoleAppender" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d{ISO8601} %-5p %m at %C.%M(%F:%L)%n" />
    </layout>
  </appender>
  
  <!--<appender name="RollingFileAppender" class="org.apache.log4j.DailyRollingFileAppender">
    <param name="File" value="${jboss.server.log.dir}/${webapp-name}.log"/>
    <param name="DatePattern" value="'.'yyyy-MM-dd"/>
    <param name="Append" value="false"/>
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d{ISO8601} %-5p %m at %C.%M(%F:%L)%n"/>
    </layout>
  </appender>-->

  <logger name="com.myservice">
    <level value="debug"/>
  </logger>

  <logger name="org.springframework">
    <level value="debug"/>
  </logger>

  <logger name="org.apache">
    <level value="debug"/>
  </logger>

  <!-- CONFIG -->
  <root>
    <priority value="debug" />
    <appender-ref ref="ConsoleAppender" />
    <!-- <appender-ref ref="RollingFileAppender" /> -->
  </root>
</log4j:configuration>

So, when I use the RollingFileAppender everything works fine. If I try to use the ConsoleAppender, when deploying, the last bit of output I get is this:

14:57:45,522 INFO  [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/my-service-1.0-SNAPSHOT]] Initializing log4j from [file:C:/settings/my-service-logging-1.0-SNAPSHOT.xml]
14:57:45,600 FINE  [javax.enterprise.resource.webcontainer.jsf.config] ConfigureListener.contextInitialized(/my-service-1.0-SNAPSHOT)
14:57:45,600 INFO  [stdout] 2013-03-22 14:57:45,600 DEBUG ConfigureListener.contextInitialized(/my-service-1.0-SNAPSHOT) at ?.?(?:?)

Followed by 115 lines of this:

2013-03-22 14:57:45,600 DEBUG ConfigureListener.contextInitialized(/my-service-1.0-SNAPSHOT) at ?.?(?:?)

After which my IDE (IntelliJ 12) hangs and it and the server (JBoss 7.0.1) takes turns att using the CPU 100%.

Does anyone have any idea of what is happening?