Beda Tsang

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since Mar 14, 2006
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Recent posts by Beda Tsang

Dear all,

I need a java program to get the list of current processes running on the task manager. I am using Windows 2000 server. Can any expert help on this?


Thank you very much.
16 years ago
Thank you for your reply. But I still got some questions,
I start Tomcat using startup.sh, which call catalina.sh. I've traced down and found that it had already skipped the security routine. However, the problem still exists, is it something related to the Java version? Since my linux version is very old, so the highest version which I can use is only 1.4.

Originally posted by seba ccaa:
I solved it,
in my case it depends on java policy of the application server upon axis builds, edit the file you use to start tomcat and change to no the value of TOMCAT5_SECURITY

TOMCAT5_SECURITY=no

restart tomcat.

my conf now is:
OS ubuntu linux 6.06
java 1.5
tomcat 5.0.30
axis2



[ September 14, 2006: Message edited by: Beda Tsang ]
[ September 14, 2006: Message edited by: Beda Tsang ]
17 years ago
Dear all,

I am going to setup web services on the Linux machine, using the follows:

Tomcat 5.0.28
j2sdk1.4.2_12
axis 1.2.1

after installation of the above, I get into the link : http://myserver:8080/axis
and can see the Apache-Axis page,
and the validation page is also ok, no error.

However, when I click the "List - View the list of deployed Web services ", it display the "Exception report" with the following error. Can anyone help me?
Thank you

***********************************************************************
exception

javax.servlet.ServletException: Servlet.init() for servlet AxisServlet threw exception
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
java.lang.Thread.run(Thread.java:534)


root cause

org.apache.axis.InternalException: org.apache.axis.ConfigurationException: java.lang.IllegalStateException: can't declare any more prefixes in this context
java.lang.IllegalStateException: can't declare any more prefixes in this context
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:691)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
at org.apache.crimson.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:185)
at org.apache.axis.utils.XMLUtils.newDocument(XMLUtils.java:369)
at org.apache.axis.utils.XMLUtils.newDocument(XMLUtils.java:388)
at org.apache.axis.configuration.FileProvider.configureEngine(FileProvider.java:179)
at org.apache.axis.AxisEngine.init(AxisEngine.java:172)
at org.apache.axis.AxisEngine.<init>(AxisEngine.java:156)
at org.apache.axis.server.AxisServer.<init>(AxisServer.java:88)
at org.apache.axis.server.DefaultAxisServerFactory.createServer(DefaultAxisServerFactory.java:109)
at org.apache.axis.server.DefaultAxisServerFactory.getServer(DefaultAxisServerFactory.java:73)
at org.apache.axis.server.AxisServer.getServer(AxisServer.java:73)
at org.apache.axis.transport.http.AxisServletBase.getEngine(AxisServletBase.java:185)
at org.apache.axis.transport.http.AxisServletBase.getOption(AxisServletBase.java:396)
at org.apache.axis.transport.http.AxisServletBase.init(AxisServletBase.java:112)
at org.apache.axis.transport.http.AxisServlet.init(AxisServlet.java:156)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)

org.apache.axis.ConfigurationException: java.lang.IllegalStateException: can't declare any more prefixes in this context
java.lang.IllegalStateException: can't declare any more prefixes in this context
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:691)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
at org.apache.crimson.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:185)
at org.apache.axis.utils.XMLUtils.newDocument(XMLUtils.java:369)
at org.apache.axis.utils.XMLUtils.newDocument(XMLUtils.java:388)
at org.apache.axis.configuration.FileProvider.configureEngine(FileProvider.java:179)
at org.apache.axis.AxisEngine.init(AxisEngine.java:172)
at org.apache.axis.AxisEngine.<init>(AxisEngine.java:156)
at org.apache.axis.server.AxisServer.<init>(AxisServer.java:88)
at org.apache.axis.server.DefaultAxisServerFactory.createServer(DefaultAxisServerFactory.java:109)
at org.apache.axis.server.DefaultAxisServerFactory.getServer(DefaultAxisServerFactory.java:73)
at org.apache.axis.server.AxisServer.getServer(AxisServer.java:73)
at org.apache.axis.transport.http.AxisServletBase.getEngine(AxisServletBase.java:185)
at org.apache.axis.transport.http.AxisServletBase.getOption(AxisServletBase.java:396)
at org.apache.axis.transport.http.AxisServletBase.init(AxisServletBase.java:112)
at org.apache.axis.transport.http.AxisServlet.init(AxisServlet.java:156)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)

at org.apache.axis.configuration.FileProvider.configureEngine(FileProvider.java:188)
at org.apache.axis.AxisEngine.init(AxisEngine.java:172)
at org.apache.axis.AxisEngine.<init>(AxisEngine.java:156)
at org.apache.axis.server.AxisServer.<init>(AxisServer.java:88)
at org.apache.axis.server.DefaultAxisServerFactory.createServer(DefaultAxisServerFactory.java:109)
at org.apache.axis.server.DefaultAxisServerFactory.getServer(DefaultAxisServerFactory.java:73)
at org.apache.axis.server.AxisServer.getServer(AxisServer.java:73)
at org.apache.axis.transport.http.AxisServletBase.getEngine(AxisServletBase.java:185)
at org.apache.axis.transport.http.AxisServletBase.getOption(AxisServletBase.java:396)
at org.apache.axis.transport.http.AxisServletBase.init(AxisServletBase.java:112)
at org.apache.axis.transport.http.AxisServlet.init(AxisServlet.java:156)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:687)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:144)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)

org.apache.axis.AxisEngine.init(AxisEngine.java:174)
org.apache.axis.AxisEngine.<init>(AxisEngine.java:156)
org.apache.axis.server.AxisServer.<init>(AxisServer.java:88)
org.apache.axis.server.DefaultAxisServerFactory.createServer(DefaultAxisServerFactory.java:109)
org.apache.axis.server.DefaultAxisServerFactory.getServer(DefaultAxisServerFactory.java:73)
org.apache.axis.server.AxisServer.getServer(AxisServer.java:73)
org.apache.axis.transport.http.AxisServletBase.getEngine(AxisServletBase.java:185)
org.apache.axis.transport.http.AxisServletBase.getOption(AxisServletBase.java:396)
org.apache.axis.transport.http.AxisServletBase.init(AxisServletBase.java:112)
org.apache.axis.transport.http.AxisServlet.init(AxisServlet.java:156)
javax.servlet.GenericServlet.init(GenericServlet.java:211)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
java.lang.Thread.run(Thread.java:534)
17 years ago
Oh...thank you both.

I got it now.

Thanks.
18 years ago
JSP
Neither Aclass nor Aclass.java exists.
Or...do I misunderstand my book.
I expect it would automatically generate a class for me when the JSP compiles. Something like what "request.getSession()" do.

The book said it would generate the class in the _jspService() method.
However, the error occur when the JSP turns into the servlet.
18 years ago
JSP
Dear all,
I am new to JSP and Servlet and now studying a book for SCWCD.
I have a set of JSP code as follows:


<html><BODY>
<jsp:useBean id="person" class="com.translate.Aclass" scope="request"/>
</BODY>
</html>



Where the class com.translate.Aclass does not exists. However the book said that it would automatically create one for me when it compiles. But the result is the compiler gives an error message.

"org.apache.jasper.JasperException: /test2.jsp(4,0) The value for the useBean class attribute com.translate.Aclass is invalid."


What is wrong ? Is there anything I have missed?

Would anybody help? Thank You.
18 years ago
JSP
Though I got 85% only,
my feeling is just like putting off a stone from my chest.

SCWCD is my next target,
I know that it would be that easy, right?

Congraduation to others who passed also..
18 years ago
Hi all, for the following codes:


class Fruit{}
class Apple extends Fruit{}
class Orange extends Fruit{}

public class Over
{
public static void main(String [] arg)
{
Apple a=new Apple(); // 1
//Fruit a=new Apple(); //2
System.out.println ( a instanceof Orange) ;

}
}



I would get an compile error where I expected to be false.
If I comment the line 1 and uncomment line 2, I would get the result.
Why is it?
Hi all,

I've read through the objectives of this exam and found to be different from that of my study book.
Is is really doesn't include the I/O (File, Listener..) and AWT ( Layout, Frame..) in the exam?

Thanks a lot