TomcatExpert

Debugging JBoss

I have been running Tomcat 6.0.24 in a Netbeans development environment for months.  Yesterday, I started getting a "java.lang.NoClassDefFoundError: org/jboss/logging/Logger" message when I try to start Tomcat in Netbeans services.  I'm not running jboss, and to my knowledge, I haven't made any changes to my computer.  The server output is:

org.apache.tomcat.util.digester.Digester startElement
SEVERE: Begin event threw error
java.lang.NoClassDefFoundError: org/jboss/logging/Logger
        at org.apache.catalina.realm.RealmBase.<clinit>(RealmBase.java:71)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at java.lang.Class.newInstance0(Class.java:355)
        at java.lang.Class.newInstance(Class.java:308)
        at org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:206)
        at org.apache.tomcat.util.digester.Rule.begin(Rule.java:153)
        at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1356)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501)
        at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:179)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1339)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2747)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
        at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:526)
        at org.apache.catalina.startup.Catalina.load(Catalina.java:560)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:261)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: java.lang.ClassNotFoundException: org.jboss.logging.Logger

 

Any guidance would be greatly appreciated.

asked by rhurdle

question

Most likely you have a jboss jar somewhere in your system.

To troubleshoot this, I recommend enabling the -XX:+TraceClassLoading option, and then scan the output for what library it is trying to load your classes from.

answer

answered by fhanik on June 12, 2012 08:04 AM

Filip Hanik is a Senior Software Engineer for the SpringSource Division of VMware, Inc. (NYSE: VMW) and a key participant in the company's Apache Tomcat initiatives. Filip brings 15 years of extensive experience in architecture, design and development of distributed application frameworks and containers and is recognized for his top-quality system development skills and continuous participation of Open Source development projects. Filip is an Apache Software Foundation member and a committer to the Apache Tomcat project where he is a leading authority on Tomcat clustering and a key contributor to the core of the platform. Filip has made contributions to software initiatives for Walmart.com, Sony Music, France Telecom and has held a variety of senior software engineering positions with technology companies in both the United States and Sweden. He received his education at Chalmers University of Technology in Gothenburg, Sweden where he majored in Computer Science and Computer Engineering.

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