<bea-101165>使用ant从eclipse部署weblogic 12.1.1中的错误时，无法在web.xml中加载用户定义的过滤器

Question

我试图在redhat上的weblogic 12.1.1中部署应用程序，我正在使用javac 1.4和ant工具在eclipse中创建.ear文件，但是每次部署后，我的受管服务器日志中都会出现此错误

 <BEA-149265> <Failure occurred in the execution of deployment request with ID "419440389241" for task "0" on [partition-name: DOMAIN]. Error is: "weblogic.application.ModuleException: java.lang.NullPointerException"
weblogic.application.ModuleException: java.lang.NullPointerException

Caused By: java.lang.NullPointerException
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)

和

<BEA-101165> <Could not load user defined filter in web.xml: com.abilitydev.authentication.web.AuthenticationChecker.
javax.servlet.ServletException: java.lang.NullPointerException

Caused By: java.lang.NullPointerException
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)

我的web.xml部分看起来像这样

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app id="WebDescriptorId">
    <description>Elektronicka podatelna</description>
    <distributable/>
    <context-param>
        <param-name>report_config</param-name>
        <param-value>/WEB-INF/report-config.xml</param-value>
    </context-param>
    <context-param>
        <param-name>crystal_image_uri</param-name>
        <param-value>/crystalreportviewers10</param-value>
    </context-param>
    
    <!-- LDAP Authentication filters begin -->
    <filter>
        <filter-name>Marker</filter-name>
        <filter-class>com.abilitydev.authentication.web.RequestMarker</filter-class>
    </filter>
    <filter>
        <filter-name>Checker</filter-name>
        <filter-class>com.abilitydev.authentication.web.AuthenticationChecker</filter-class>
        <init-param>
            <param-name>channel</param-name>
            <param-value>web</param-value>
        </init-param>
        <init-param>
            <param-name>mapping</param-name>
            <param-value>/ad_security_check</param-value>
        </init-param>
        <init-param>
            <param-name>defaultPage</param-name>
            <param-value>index.jsp</param-value>
        </init-param>
    </filter>