tag library not found in jsp page - oc4j error messages.

From: ddog <wgblackmon_at_yahoo.com>
Date: 10 Jan 2007 08:15:45 -0800
Message-ID: <1168445745.610159.109560@i39g2000hsf.googlegroups.com>

I'm having a big problem with jsp/tag libraries using oc4j. One particular
tag library is not being 'found' for some mysterious reason. The particulars follow:

kwTags.jar is the jar file containing the tag classes. It definitely exists in WEB-INF/lib directory.

tld def. in web.xml:

<taglib>
<taglib-uri>/kw</taglib-uri>
<taglib-location>/WEB-INF/tlds/kwTagLib.tld</taglib-location>
</taglib>

The tld file definitely exists in the /WEB-INF/tlds directory. The definition of the tag lib at the top of the kwTagLib.tld follows: <taglib>

<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name>kw</short-name>
<uri>/kw</uri>
<display-name>kwTagLib</display-name>
<small-icon></small-icon>
<large-icon></large-icon>
<description></description>

The tag reference in jsp page is:
<%@ taglib uri="/WEB-INF/tlds/kwTagLib.tld" prefix="kw" %>

The development environment is Eclipse Workbench 5.1.0 and Eclipse v.3.2.1
JDK is: j2sdk1.4.2_04

All other tag libs (Struts v.1.3.5) are found and work correctly. This is the only tag library that
a problem.

Error Message follows:
java.lang.NullPointerException at
oracle.jsp.parse.JspDirectiveTaglib.validateAttributes(JspDirectiveTaglib.java:183)

at
oracle.jsp.parse.JspParseTagDirective.validateTagAttributes(JspParseTagDirective.java:180)

at oracle.jsp.parse.JspParseTag.parse(JspParseTag.java:921) at
oracle.jsp.parse.JspParseTagDirective.parse(JspParseTagDirective.java:326)

at oracle.jsp.parse.JspParseTag.parseNextTag(JspParseTag.java:705)
at oracle.jsp.parse.JspParseTagFile.parse(JspParseTagFile.java:184)
at oracle.jsp.parse.OracleJsp2Java.transform(OracleJsp2Java.java:154)

at
oracle.jsp.runtimev2.JspPageCompiler.attemptCompilePage(JspPageCompiler.java:428)

at
oracle.jsp.runtimev2.JspPageCompiler.compilePage(JspPageCompiler.java:284)

at
oracle.jsp.runtimev2.JspPageInfo.compileAndLoad(JspPageInfo.java:483) at
oracle.jsp.runtimev2.JspPageTable.compileAndServe(JspPageTable.java:542)

at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:305) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509)

at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:810)

at
com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)

at
com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:251)

at
org.apache.struts.chain.commands.servlet.PerformForward.handleAsForward(PerformForward.java:99)

at
org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:82)

at
org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:51)

at
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:48)

at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190) at
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)

at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190) at
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:280)

at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)

at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:459) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)

at
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)

at
com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:649)

at
com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)

at
com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790)

at
com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)

at
com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)

at
com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)

at java.lang.Thread.run(Thread.java:534) Received on Wed Jan 10 2007 - 10:15:45 CST