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Posted to users@tomcat.apache.org by Manav Gupta <Ma...@cramer.com> on 2003/06/10 16:57:58 UTC
Tomcat classpath problem
Apologies for the re-post, but I'm not sure if my messages are reaching the
list.
-------
Hi,
I'm trying to understand the tomcat class loading mechanism and have read
through the Class Loader HOW-TO (
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/class-loader-howto.html
<http://jakarta.apache.org/tomcat/tomcat-4.1-doc/class-loader-howto.html> ).
How does one make additional jars available to tomcat? I understand one can
add them to WEB-INF/lib,but there are sometimes that approach does not work.
Here's a scenario:
I'm using tomcat 4.1.24 with jdk 1.4.1_02. One of the required libraries for
my web app is oc4j.jar. If I put that oc4j.jar into the WEB-INF/lib, tomcat
throws the following error on startup:
=====
Starting service Tomcat-Standalone
Apache Tomcat/4.1.24
WebappClassLoader:
validateJarFile(D:\jakarta-tomcat-4.1.24\bin\..\webapps\graphics\WEB-INF\lib
\oc4j.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending
class: javax/servlet/Servlet.class
=====
Upon checking, I found oc4j.jar has javax.servlet.Servlet and I suspect it
does not adhere to Servlet Spec 2.3 (but probably something earlier than
that).
If I do not put oc4j.jar in WEB-INF/lib, I get the following error:
2003-06-10 13:28:43 StandardWrapperValve[jsp]: Servlet.service() for servlet
jsp threw exception
javax.servlet.ServletException:
javax.servlet.jsp.tagext.TagInfo.<init>(Ljava/lang/String;Ljava/lang/String;
Ljava/lang/String;Ljava/lang/String;Ljavax/servlet/jsp/tagext/TagLibraryInfo
;Ljavax/servlet/jsp/tagext/TagExtraInfo;[Ljavax/servlet/jsp/tagext/TagAttrib
uteInfo;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;[Ljavax/servle
t/jsp/tagext/TagVariableInfo;)V
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConne
ction(Http11Protocol.java:392)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:619)
at java.lang.Thread.run(Thread.java:536)
Root cause is; java.lang.NoSuchMethodError:
javax.servlet.jsp.tagext.TagInfo.<init>(Ljava/lang/String;Ljava/lang/String;
Ljava/lang/String;Ljava/lang/String;Ljavax/servlet/jsp/tagext/TagLibraryInfo
;Ljavax/servlet/jsp/tagext/TagExtraInfo;[Ljavax/servlet/jsp/tagext/TagAttrib
uteInfo;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;[Ljavax/servle
t/jsp/tagext/TagVariableInfo;)V
at
org.apache.jasper.compiler.TagLibraryInfoImpl.createTagInfo(TagLibraryInfoIm
pl.java:385)
(and a whole lot of lines)
This above error stems from a particular tag library that I have written,
and when tomcat tries to generate the java source from the jsp page, it
fails (the translated file inside the work folder has a size of zero bytes).
But, If I remove the oc4j.jar from the tomcat startup path (I had modified
setclasspath.bat to include oc4j.jar) and oc4j.jar is there inside
WEB-INF/lib then I get the following error:
javax.naming.NoInitialContextException: Cannot instantiate class:
com.evermind.server.rmi.RMIInitialContextFactory. Root exception is
java.lang.ClassNotFoundException:
com.evermind.server.rmi.RMIInitialContextFactory
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
a:1443)
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
a:1289)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:217)
at
com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:42)
at
javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:649)
at
javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.init(InitialContext.java:219)
at javax.naming.InitialContext.<init>(InitialContext.java:195)
at
com.cramer.graphics.server.ViewHelperUtility.getInventory(ViewHelperUtility.
java:45)
at
com.cramer.graphics.server.NetworkViewHelper.initialiseValueObjects(NetworkV
iewHelper.java:54)
at
com.cramer.graphics.server.NetworkViewHelper.<init>(NetworkViewHelper.java:3
7)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
sorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
torAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at
com.cramer.graphics.taglib.ViewHelperTag.createObject(ViewHelperTag.java:86)
at
com.cramer.graphics.taglib.ViewHelperTag.doInitBody(ViewHelperTag.java:52)
at
org.apache.jsp.networkViewGenerator_jsp._jspService(networkViewGenerator_jsp
.java:105)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2
10)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConne
ction(Http11Protocol.java:392)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:619)
at java.lang.Thread.run(Thread.java:536)
$$$$$$java.lang.reflect.InvocationTargetException
com.cramer.graphics.shared.GraphicsException: ViewHelperUtility:
getObjectInventory:Cannot instantiate class:
com.evermind.server.rmi.RMIInitialContextFactory at
com.cramer.graphics.server.ViewHelperUtility.getInventory(ViewHelperU
tility.java:64)
at
com.cramer.graphics.server.NetworkViewHelper.initialiseValueObjects(NetworkV
iewHelper.java:54)
at
com.cramer.graphics.server.NetworkViewHelper.<init>(NetworkViewHelper.java:3
7)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
sorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
torAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at
com.cramer.graphics.taglib.ViewHelperTag.createObject(ViewHelperTag.java:86)
at
com.cramer.graphics.taglib.ViewHelperTag.doInitBody(ViewHelperTag.java:52)
at
org.apache.jsp.networkViewGenerator_jsp._jspService(networkViewGenerator_jsp
.java:105)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2
10)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConne
ction(Http11Protocol.java:392)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:619)
at java.lang.Thread.run(Thread.java:536)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
sorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
torAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at
com.cramer.graphics.taglib.ViewHelperTag.createObject(ViewHelperTag.java:86)
at
com.cramer.graphics.taglib.ViewHelperTag.doInitBody(ViewHelperTag.java:52)
at
org.apache.jsp.networkViewGenerator_jsp._jspService(networkViewGenerator_jsp
.java:105)
at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:2
10)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.
... 42 more
I suspect I don't need to fiddle with the tomcat classpath. But how do I get
tomcat to load the oc4j.jar from the WEB-INF/lib and use the
com.evermind.server.rmi.RMIInitialContextFactory class?
Tomcat does its job when it tries to load the jar file, but the verification
fails and it is unable to load it. Any ideas what a workaround could be?
Many Thanks,
M