Re: Multiple Servlets and NTEventLogAppender

Christopher Taylor Tue, 24 Apr 2001 22:45:55 -0700

Title: Multiple Servlets and NTEventLogAppender

Haven't tried it, but my guess would be to put the Log4J JAR file in the TOMCAT_HOME\lib folder.

-Chris

----- Original Message -----

From: Eli Tucker

To: '[EMAIL PROTECTED]'

Sent: Tuesday, April 24, 2001 11:41 AM

Subject: Multiple Servlets and NTEventLogAppender

I'm having a problem using the NTEventLogAppender in log4j 1.0.4 with Tomcat 3.2 and two different web applications. I have both web applications loading the same XML configuration file found in %TOMCAT_HOME%\conf\log4j-config.xml. When the second web app loads, I see the following exception:

java.lang.UnsatisfiedLinkError: Native Library C:\WINNT\NTEventLogAppender.dll already loaded in another classloader
        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1346)
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1306)
        at java.lang.Runtime.loadLibrary0(Runtime.java:749)
        at java.lang.System.loadLibrary(System.java:820)
        at org.apache.log4j.nt.NTEventLogAppender.<clinit>(NTEventLogAppender.java:120)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:120)
        at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:144)
        at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:129)
        at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfCategoryElement(DOMConfigurator.java:352)
        at org.apache.log4j.xml.DOMConfigurator.parseCategory(DOMConfigurator.java:310)
        at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:636)
        at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:567)
        at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:513)
        at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:582)
        at com.itxc.sdialer.ServerDialer.<init>(ServerDialer.java:155)
        at java.lang.Class.newInstance0(Native Method)
        at java.lang.Class.newInstance(Class.java:237)
        at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:268)
        at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289)
        at org.apache.tomcat.context.LoadOnStartupInterceptor.contextInit(LoadOnStartupInterceptor.java:130)
        at org.apache.tomcat.core.ContextManager.initContext(ContextManager.java:491)
        at org.apache.tomcat.core.ContextManager.init(ContextManager.java:453)
        at org.apache.tomcat.startup.Tomcat.execute(Tomcat.java:195)
        at org.apache.tomcat.startup.Tomcat.main(Tomcat.java:235)

Here are the pertinent lines from my log4j-config.xml file:

...

<appender name="EventLog" class="org.apache.log4j.nt.NTEventLogAppender">
     <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern"
               value="%d %-5p [%t] %c (%F:%L) - %m"/>
        />
     </layout>
</appender>


<category name="com.itxc">
    <priority value="warn" />
    <appender-ref ref="EventLog" />
</category>

<root>
     <priority value ="debug" />
     <appender-ref ref="RollingFile" />
</root>

What do I have to do in order to get two (or more) webapps to both log to the NT Event Log?
Thanks in advance for your help.

Eli Tucker
ITXC Corp.

Re: Multiple Servlets and NTEventLogAppender

Reply via email to