HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Error instantiating servlet class com.fayettedigital.jxsearch.servlets.SmokeTest org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) java.lang.Thread.run(libgcj.so.81) root cause java.lang.NoClassDefFoundError: com.fayettedigital.jxsearch.servlets.SmokeTest java.lang.Class.initializeClass(libgcj.so.81) java.lang.Class.newInstance(libgcj.so.81) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) java.lang.Thread.run(libgcj.so.81) root cause java.lang.ClassNotFoundException: org.xapian.Query org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1362) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1208) java.lang.Class.initializeClass(libgcj.so.81) java.lang.Class.newInstance(libgcj.so.81) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) java.lang.Thread.run(libgcj.so.81) note The full stack trace of the root cause is available in the Apache Tomcat/5.5 logs. Apache Tomcat/5.5