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java.lang.NullPointerException: Module 'null' not found.

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posted 10 years ago

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Hi friends,
We created one web application in struts 1.3, in web logic 10.3.4 server and we are trying to deploy that application on web logic 10.3 server. We used jdk1.6 which is same on client environment.
Our application successfully deployed there, jsp pages which fetching data from package classes in my application is working properly.
But, pages which having html:form are not loaded. i am getting following error.

java.lang.NullPointerException: Module 'null' not found.
        at org.apache.struts.taglib.TagUtils.getModuleConfig(TagUtils.java:755)
        at org.apache.struts.taglib.TagUtils.getModuleConfig(TagUtils.java:735)
        at org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:818)
        at org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:488)
        at jsp_servlet.__imcheckers._jsp__tag0(__imcheckers.java:326)
        at jsp_servlet.__imcheckers._jspService(__imcheckers.java:297)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
        at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:408)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:318)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(Unknown Source)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(Unknown Source)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(Unknown Source)
        at weblogic.servlet.internal.WebAppServletContext.execute(Unknown Source)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

here is my web.xml file.

here is my struts-config.xml file.

my jsp pages html:form bean declaration and code is as followed.

bellow is list of jar file i used,
antlr-2.7.2.jar
commons-beanutils-1.7.0.jar
commons-chain-1.2.jar
commons-digester-2.0.jar
commons-logging-1.0.4.jar
commons-validator-1.3.1.jar
oro-2.0.8.jar
struts-core-1.3.10.jar
struts-taglib-1.3.10.jar
struts-tiles-1.3.10.jar

I am stuck into this issue from very long time, and I tried almost everything I know, but getting same error. Any help or suggestion is appreciated.
Thanks

Joe Ess

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Vinod suryawanshi

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Hi Joe, thanks for your reply,
I visited that link, but still I am quite confuse for solution.
As per my research on this issue, I am thinking this issue may occur because of 2 reasons.
1. My struts-config.xml file DTD wrong version. below is log which I got when web logic10.3 server start up.

<May 7, 2014 6:41:40 PM IST> <Error> <HTTP> <BEA-101216> <Servlet: "action" failed to preload on startup in Web application: "Rboimgr".
javax.servlet.UnavailableException
        at org.apache.struts.action.ActionServlet.init(ActionServlet.java:402)
        at javax.servlet.GenericServlet.init(GenericServlet.java:241)
        at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(Unknown Source)
        Truncated. see log file for complete stacktrace
>
log4j:WARN No appenders could be found for logger (com.sun.faces.config.ConfigureListener).
log4j:WARN Please initialize the log4j system properly.
register('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN', 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/struts-config_1_0.dtd'
register('-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN', 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_2.dtd'
register('-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN', 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_3.dtd'
resolveEntity('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN', 'http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd')
 Resolving to alternate DTD 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/struts-config_1_0.dtd'
New org.apache.struts.action.ActionMapping
Set org.apache.struts.action.ActionMapping properties
New org.apache.struts.action.ActionForward
Set org.apache.struts.action.ActionForward properties
Call org.apache.struts.action.ActionMapping.addForward(ActionForward[default])
Pop org.apache.struts.action.ActionForward
Call org.apache.struts.action.ActionServlet.addMapping(ActionMapping[path=/Flash_FlashVars/flashvarsEdit, type=com.businessobjects.clientaction.flash.flashvars.FlashVarsEditAction])
Pop org.apache.struts.action.ActionMapping
register('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN', 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/struts-config_1_0.dtd'
register('-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN', 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_2.dtd'
register('-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN', 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_3.dtd'
resolveEntity('-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN', 'http://java.sun.com/dtd/web-app_2_3.dtd')
 Resolving to alternate DTD 'zip:/BOC/weblogic10/user_projects/domains/bodom/servers/bomanage/tmp/_WL_user/Xcelsius/188tmc/war/WEB-INF/lib/struts.jar!/org/apache/struts/resources/web-app_2_3.dtd'
Call org.apache.struts.action.ActionServlet.addServletMapping(DocumentDownload/java.lang.String,/opendoc/documentDownload/java.lang.String)
Call org.apache.struts.action.ActionServlet.addServletMapping(action/java.lang.String,*.do/java.lang.String)
log4j:WARN No appenders could be found for logger (org.apache.axis2.deployment.WarBasedAxisConfigurator).
log4j:WARN Please initialize the log4j system properly.

2. Weblogic SAXParserFactory issue,
I visited two below links,
link1
and
link2

and as per the link, this issue is related to web logic 10.3 bug, so i have to fixed it by setting appropriate SAXParserFactory.

Please suggest me, am I on right track to solve to this issue or not.

Joe Ess

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posted 10 years ago

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1. My struts-config.xml file DTD wrong version. below is log which I got when web logic10.3 server start up.

I don't see it. It is being successfully resolved to an alternate location. What DTD do you reference in your struts.xml file?

2. Weblogic SAXParserFactory issue,

Why would you say that? You aren't getting an error from the SAX parser.

I'm curious about this:

What does the full stack trace of that error look like?

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Vinod suryawanshi

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posted 10 years ago

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Thanks Joe Ess for your reply,
I solved this issue,

Solution for this issue is,
This issue is related to web logic 10.3 SAXParserFactory only.
when I replace my commons-digester-2.0.jar file with commons-digester-1.8.jar, my issue solved.

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