java.lang.LinkageError

[Sascha Kretschmer]

Hi there,

I change my project from Tomcat 3.2 to Tomcat 4.0.
Now I´m getting the "java.lang.LinkageError / loader constraints violated when
linking org/xml/sax/HandlerBase class"-error, while connecting to the (oracle-
)database. For connecting I use the poolman.xml.

When I debug the projekt I find that the error apears while trying to connect
via:

public static Connection getConnection()
throws SQLException {
Connection con = DriverManager.getConnection("jdbc:poolman://dbname");
return con;
}

Has anyone dealt with such a problem or a helping idea?

THX alot, Sasch

PS: The stacktrace (if needed):

java.lang.LinkageError: loader constraints violated when linking
org/xml/sax/HandlerBase class
at com.codestudio.management.PoolManConfiguration.parseXML(Unknown Source)
at com.codestudio.management.PoolManConfiguration.loadConfiguration(Unknown
Source)
at com.codestudio.management.PoolManBootstrap.(Unknown Source)
at com.codestudio.util.SQLManager.assertLoaded(Unknown Source)
at com.codestudio.util.SQLManager.requestConnection(Unknown Source)
at com.codestudio.sql.PoolMan.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:193)
at db.SQLConPool.getConnection(SQLConPool.java:26)
at db.SQLCon.connect(SQLCon.java:38)
at admin.UserDB.authUserDB(UserDB.java:554)
at admin.User.authUser(User.java:492)
at auth.LoginBean.checkUser(LoginBean.java:99)
at auth.LoginBean.processBean(LoginBean.java:84)
at org.apache.jsp.loginController$jsp._jspService(loginController$jsp.java:159)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.
service(IDEJspServlet.java:172)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.
serviceJspFile(IDEJspServlet.java:234)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.
service(IDEJspServlet.java:326)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.
internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.
doFilter(ApplicationFilterChain.java:193)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.
java:225)
at org.apache.catalina.core.ApplicationFilterChain.
internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.
doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.
java:243)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.
java:201)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:566)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.
java:246)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:564)
at org.netbeans.modules.web.monitor.catalina.MonitorValve.invoke(MonitorValve.
java:144)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.
java:164)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:566)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:564)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.
java:170)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:564)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:163)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.
java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.
java:1011)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.
java:1106)
at java.lang.Thread.run(Thread.java:536)
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