NullPointerException when using ErrorHandler

[Himanshu Gupta]

Hi Guys,

 I am using ErrorHandler in my log4j.xml file but when I put my node as:

   <appender 
class="com.egain.platform.util.logging.appender.RollingFileAppender" 
name="root">
 <errorHandler 
class="platform.util.logging.appender.handler.FallbackErrorHandler">
  <root-ref/><appender-ref ref="local_appender"/>
 </errorHandler>
        <param name="File" value="egpl_root_${HOST_NAME}.log"/>
        <param name="MaxFileSize" value="5MB"/>
        <param name="Threshold" value="debug"/>
        <layout class="com.egain.platform.util.logging.appender.PatternLayout">
            <param name="Pattern" value="extended"/>
        </layout>
    </appender>

 it throws a NullPointerException saying:

13 Aug 2009 18:05:26,351 <@> INFO <@> [:Finalizer] <@>  <@>  <@>  <@>  <@> 
platform.util.logging.LoggingOutputStream <@> flush <@> log4j: Finalizing 
appender named [V9W13_dsm-registry]. <@> 
13 Aug 2009 18:05:26,351 <@> ERROR <@> [:main] <@>  <@>  <@>  <@>  <@> 
platform.util.logging.LoggingOutputStream <@> flush <@>  at 
org.apache.log4j.xml.DOMConfigurator.parseErrorHandler(DOMConfigurator.java:329)
 <@> 
13 Aug 2009 18:05:26,351 <@> ERROR <@> [:main] <@>  <@>  <@>  <@>  <@> 
platform.util.logging.LoggingOutputStream <@> flush <@>  at 
org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:266) 
<@> 
13 Aug 2009 18:05:26,351 <@> ERROR <@> [:main] <@>  <@>  <@>  <@>  <@> 
platform.util.logging.LoggingOutputStream <@> flush <@>  at 
org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:171)
 <@> 
13 Aug 2009 18:05:26,366 <@> ERROR <@> [:main] <@>  <@>  <@>  <@>  <@> 
platform.util.logging.LoggingOutputStream <@> flush <@> 
java.lang.ExceptionInInitializerError <@> 

 Can anyone please shed some light on this?

Thanks,
 Himanshu