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Struts 1.3.10 Digester.getParser() UnsupportedOperationException
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I am attempting to start up a Struts 1.X (version 1.3.10) application using OC4J version 10.1.3.5. The application manages to initialize all the Spring beans, including the Struts Actions defined in action-servlet.xml. However, once all the beans are initialized, I get a rather ugly exception in the log.

I suspected an issue in xalan (2.7.1), xercesImpl (2.9.1), or xml-apis (1.3.04), but all these are using the newest versions. The exception says that a dependency may be missing, but I am unable to determine what it might be.

Any help is appreciated. (Note: I can't update to Struts 2.X at this time. The application is a legacy one that will likely be replaced).

 Digester.getParser:                                                                             08:18:10,794 ERROR Digester(789)
java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"
    at javax.xml.parsers.SAXParserFactory.setXIncludeAware(SAXParserFactory.java:390)
    at org.apache.commons.digester.Digester.getFactory(Digester.java:534)
    at org.apache.commons.digester.Digester.getParser(Digester.java:786)
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.initPreloadServlets(HttpApplication.java:5118)
    at com.evermind.server.http.HttpApplication.initDynamic(HttpApplication.java:1283)
    at com.evermind.server.http.HttpApplication.<init>(HttpApplication.java:848)
    at com.evermind.server.ApplicationStateRunning.getHttpApplication(ApplicationStateRunning.java:435)
    at com.evermind.server.Application.getHttpApplication(Application.java:592)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.createHttpApplicationFromReference(HttpSite.java:2280)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.<init>(HttpSite.java:2199)
    at com.evermind.server.http.HttpSite.initApplications(HttpSite.java:701)
    at com.evermind.server.http.HttpSite.setConfig(HttpSite.java:308)
    at com.evermind.server.http.HttpServer.setSites(HttpServer.java:280)
    at com.evermind.server.http.HttpServer.setConfig(HttpServer.java:180)
    at com.evermind.server.ApplicationServer.initializeHttp(ApplicationServer.java:2541)
    at com.evermind.server.ApplicationServer.setConfig(ApplicationServer.java:1058)
    at com.evermind.server.ApplicationServerLauncher.run(ApplicationServerLauncher.java:131)
    at java.lang.Thread.run(Thread.java:595)
Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable.  Most likely, this is due to an incorrect or missing library dependency. 08:18:10,802 ERROR ActionServlet(398)
java.lang.NullPointerException
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.initPreloadServlets(HttpApplication.java:5118)
    at com.evermind.server.http.HttpApplication.initDynamic(HttpApplication.java:1283)
    at com.evermind.server.http.HttpApplication.<init>(HttpApplication.java:848)
    at com.evermind.server.ApplicationStateRunning.getHttpApplication(ApplicationStateRunning.java:435)
    at com.evermind.server.Application.getHttpApplication(Application.java:592)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.createHttpApplicationFromReference(HttpSite.java:2280)
    at com.evermind.server.http.HttpSite$HttpApplicationRunTimeReference.<init>(HttpSite.java:2199)
    at com.evermind.server.http.HttpSite.initApplications(HttpSite.java:701)
    at com.evermind.server.http.HttpSite.setConfig(HttpSite.java:308)
    at com.evermind.server.http.HttpServer.setSites(HttpServer.java:280)
    at com.evermind.server.http.HttpServer.setConfig(HttpServer.java:180)
    at com.evermind.server.ApplicationServer.initializeHttp(ApplicationServer.java:2541)
    at com.evermind.server.ApplicationServer.setConfig(ApplicationServer.java:1058)
    at com.evermind.server.ApplicationServerLauncher.run(ApplicationServerLauncher.java:131)
    at java.lang.Thread.run(Thread.java:595)
Digester.getParser:                                                                             08:18:20,228 ERROR Digester(789)
java.lang.UnsupportedOperationException: This parser does not support specification "null" version "null"
    at javax.xml.parsers.SAXParserFactory.setXIncludeAware(SAXParserFactory.java:390)
    at org.apache.commons.digester.Digester.getFactory(Digester.java:534)
    at org.apache.commons.digester.Digester.getParser(Digester.java:786)
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.getRequestDispatcher(HttpApplication.java:3139)
    at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:775)
    at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)
    at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:226)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:127)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:116)
    at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
    at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:234)
    at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:29)
    at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:879)
    at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
    at java.lang.Thread.run(Thread.java:595)
Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable.  Most likely, this is due to an incorrect or missing library dependency. 08:18:20,231 ERROR ActionServlet(398)
java.lang.NullPointerException
    at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1058)
    at org.apache.commons.digester.Digester.parse(Digester.java:1887)
    at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1785)
    at org.apache.struts.action.ActionServlet.init(ActionServlet.java:349)
    at javax.servlet.GenericServlet.init(GenericServlet.java:256)
    at com.evermind.server.http.HttpApplication.loadServlet(HttpApplication.java:2528)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:5006)
    at com.evermind.server.http.HttpApplication.findServlet(HttpApplication.java:4930)
    at com.evermind.server.http.HttpApplication.getRequestDispatcher(HttpApplication.java:3139)
    at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:775)
    at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)
    at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:226)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:127)
    at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:116)
    at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
    at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:234)
    at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:29)
    at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:879)
    at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
    at java.lang.Thread.run(Thread.java:595)
Escribe answered 20/1, 2010 at 15:39 Comment(0)
E
0

Never mind, I hadn't configured OC4J's global-web-application.xml to search local classes first or created a custom orion-web.xml file to do the same thing.

If you run into this issue, the easiest (big hammer) approach is to add this line to (oc4j dir)\j2ee\home\config\global-web-application.xml:

<web-app-class-loader search-local-classes-first="true"/>

The problem is that if you try to use Xerces or another somewhat up-to-date SAX parser, you'll run into a classpath issue with the one Oracle tries to force down your throat (same as with any of their products).

Escribe answered 20/1, 2010 at 19:4 Comment(0)
P
4

I faced this issue when i tried to validate xml file using xml schema. I googled and found out the root cause for this issue.

Jar files like xerces-2.6.2.jar, crimson.jar, xalan.jar along with jaxp.jar has older version SAXParserFactory. So all the above jar files should be removed from class parh.

Remove or update jar based on its jars with correct version.

Pigeonhearted answered 17/11, 2012 at 10:1 Comment(2)
Yeah, this is an old one of mine, but I've run into the same issue since switching to Weblogic. Basically, the first thing to try tends to be to set xml-apis to have <scope>provided</scope> in the pom.xml. – Escribe
This actually helpful! Thanks. – Nadene
C
4

If it helps anyone : I had a similar issues and providing the SaxParserFactory as a JVM option worked

-Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl
Cesaria answered 2/6, 2015 at 19:5 Comment(1)
this works and if anyone is using tomcat then follow this answer - https://mcmap.net/q/1769996/-tomcat-this-parser-does-not-support-specification-null-version-null – Acrobat
B
1

Use Commons Digester 1.7, instead of the Commons Digester that is included with JDeveloper. http://jakarta.apache.org/commons/digester/

Bb answered 14/9, 2015 at 7:33 Comment(0)
P
1

In my case, i have dowgrade commons-digester from 2.1 to 1.8 and work fine.

Precipitancy answered 1/2, 2022 at 14:38 Comment(0)
E
0

Never mind, I hadn't configured OC4J's global-web-application.xml to search local classes first or created a custom orion-web.xml file to do the same thing.

If you run into this issue, the easiest (big hammer) approach is to add this line to (oc4j dir)\j2ee\home\config\global-web-application.xml:

<web-app-class-loader search-local-classes-first="true"/>

The problem is that if you try to use Xerces or another somewhat up-to-date SAX parser, you'll run into a classpath issue with the one Oracle tries to force down your throat (same as with any of their products).

Escribe answered 20/1, 2010 at 19:4 Comment(0)

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