Exception while accessing a com port from servlet

I am trying to access communication port from a Servlet using java communications api's.
But Following exception was thrown
Caught java.lang.NullPointerException:name can't be null while loading driver com.sun.comm.Win32Driver
The SecurityManager do not allow that opeartion.
java.security AccessControlException:access denied (java.io.FilePermission c:\j2sdk1.4.1\jre\lib\javax.comm.properties delete)
at java.security.AccessControlContext.java:270) at java.security.AccessController.checkPermission(SecurityManager.java)
at java.lang.SecurityManager.checkDelete()
at java.comm.CommPortIdentifier.getPortIdentifiers(CommportIdentifier.java)
Please help me.Tell me what to do.how to successfully access a communication port from a Servlet.

Solved!!. Just make sure u r placing neccessary files (comm.jar, win32com.dll and javax.comm.properties)onto the right JVM folders. Since JVM may be installed in many different location in your PC, U might want to do some search around looking for java.exe elsewhere in the system. Good luck!

Similar Messages

Exception while accessing com port from servlet

I am trying to access communication port from a Servlet using java communications api's.
But Following exception was thrown
Caught java.lang.NullPointerException:name can't be null while loading driver com.sun.comm.Win32Driver
The SecurityManager do not allow that opeartion.
java.security AccessControlException:access denied (java.io.FilePermission c:\j2sdk1.4.1\jre\lib\javax.comm.properties delete)
at java.security.AccessControlContext.java:270) at java.security.AccessController.checkPermission(SecurityManager.java)
at java.lang.SecurityManager.checkDelete()
at java.comm.CommPortIdentifier.getPortIdentifiers(CommportIdentifier.java)
Please help me.Tell me what to do.how to successfully access a communication port from a Servlet.

Hi there. I am also facing the problem accessing com port via servlet. if u have the solution, kindly forward to me at [email protected]
many thanks

Security Exception while accessing com port from servlet

I am trying to access communication port from a Servlet using java communications api's.
But Following exception was thrown
Caught java.lang.NullPointerException:name can't be null while loading driver com.sun.comm.Win32Driver
The SecurityManager do not allow that opeartion.
java.security AccessControlException:access denied (java.io.FilePermission c:\j2sdk1.4.1\jre\lib\javax.comm.properties delete)
at java.security.AccessControlContext.java:270) at java.security.AccessController.checkPermission(SecurityManager.java)
at java.lang.SecurityManager.checkDelete()
at java.comm.CommPortIdentifier.getPortIdentifiers(CommportIdentifier.java)
Please help me.Tell me what to do.how to successfully access a communication port from a Servlet.

Well, have you tried the obvious to add the following permission to your web server's policy file?
grant "file:<wherever my servlet resides>\myservlet.jar" {
permission java.io.FilePermission "c:\j2sdk1.4.1\jre\lib\javax.comm.properties", "write,delete";
}

Getting Servlet Exception while accessing servlets after deployment

Hi,
Iam getting a Servlet Exception while accessing servlets after deploying into weblogic 8.1
Error 500--Internal Server Error
javax.servlet.ServletException: [HTTP:101249][ServletContext(id=9599010,name=MyWeb,context-path=)]: Servlet class LoginServlet for servlet LoginServlet could not be loaded because the requested class was not found in the classpath F:\bea\weblogic81\samples\domains\examples\MyWeb\WEB-INF\classes;F:\bea\weblogic81\samples\domains\examples\.\examplesServer\.wlnotdelete\extract\examplesServer_MyWeb_MyWeb.
java.lang.UnsupportedClassVersionError: LoginServlet (Unsupported major.minor version 49.0).
     at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:834)
     at weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:535)
     at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:373)
     at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6718)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
     at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)
     at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
My Folder Structureis like this,
F:\bea\weblogic81\samples\domains\examples\MyWeb
MyWeb is the projectName
F:\bea\weblogic81\samples\domains\examples\MyWeb\WEB-INF
Inside WEB-INF, i have web.xml and weblogic.xml, and classes directory with servlet classes.
Any help will be appreciated.
Thanx in advance.
Regards
Ram

Hi,
Thanks for the reply.
Yes you are correct, i compiled using jdk1.5.
but my servlet code will not compile in jdk1.4 version since i used advanced vaector classes in that.
Is there any settings like script file that need to be changed so that i can point to my jdk1.5 compiler rather than the default one pointed by weblogic.
Thanks in advance
Ram

"Access Violation" exception while accessing PDEImage in outside of the class as a parameter

Hi,
In our project, we are retrieving PDEImage content from PDF Page by using below line of code in our Plugin project:
But we are getting "Access Violation" exception while accessing retrieved PDEImage in outside of the class as a parameter.
This issue is happening only in Windows 8.1 and Acrobat 11 combination.
If we remove the above highlighted lines from the method then no exception and working fine.
But we don't know why these lines are added, because we are not updating any of the PDF content here.
We are planning to remove these highlighted lines from the method.
We want to know whether the removing of these lines will impact the application.
Kindly help us to resolve the issue.

And will removing the lines impact the application? Certainly. If you do not call PDPageReleasePDEContent you will have a memory leak at best, or may prevent other activity from completing (such as saving or closing the file). The first two lines, however, are redundant since you do not seem to be actually changing the page.
You must call PDPageReleasePDEContent when you have finished with the content, in every case.

Access of JSF Beans from Servlet Filter

Is there any way how can I access session JSF beans from servlet filter?
I need to check certain value of JSF bean stored in session scope in my filter.
Thanks
ferdo

Frank,
I am not sure about phase listener, this is the whole situation:
as I am not using Container Managed Security with my JSF, after I do sucessfull login into application, I need to store some information into the session scope (user etc) and in the servlet filter I need to find out if the user is connected.
I was trying to put such info into Servlet Session directly in my bean via External Context and reading the info in Filter.
This is working fine when my application is running locally (jdev oc4j) but once deployed into Application server, when user login first time, user information is somehow removed from the session, and cannot figure out why.
So I was thinking to try another approach, to find out from servlet filter if JSF bean value is set or not.
Any other suggestions? Do not want to swicth to Container Manages Security now.
ferdo
null

Getting exception while accessing External WebServices from Portal Componen

Hi,
We are using one external Temperature WebService and calling it from the proxy which is called by a Portal Component. My proxy name is TempService and portal component name is TempComponent.While calling the web service from portal component we are getting the exception. When I checked with log file, I got that invokeMethod() is failing and following exception is occuring :
Caused by: com.sap.engine.services.webservices.jaxm.soap.accessor.NestedSOAPException: IOError while working with the message. Check the nested Exception.
     at com.sapportals.portal.prt.service.soap.SOAPService.call(SOAPService.java:197)
     at com.sapportals.portal.prt.service.soap.PRTSOAPCall.invokeMethod(PRTSOAPCall.java:209)
     at com.sap.portal.tutorial.translation.TempService.getTemp(TempService.java:158)
     at com.sap.portal.tutorial.TempComponent.TempComponent.doContent(TempComponent.java:18)
Can some one help us to resolve it.
Thanks in advance,
ajay

As far as I know, webservices are working pretty well from SP2 Patch4. On patch3 hf2 I've had problems creating the proxy classes (especially for consuming .net webservices) and also gotten some runtime exception (cannot remember what they were).
Suggest you open an OSS against SAP with your specific problem.

Getting atg.servlet.pagecompile.PageCompileException: can't load class: _dasadmin_3__UTF_s8._index Exception while accessing merch server dynamo

Hi Experts,
I am getting following error while accessing merch server dynamo,
18:10:17,334 ERROR [STDERR] java.lang.UnsupportedClassVersionError: _dasadmin_3__UTF_s8/_index : Unsupported major.minor version 51.0
18:10:17,335 ERROR [STDERR]     at java.lang.ClassLoader.defineClass1(Native Method)
18:10:17,335 ERROR [STDERR]     at java.lang.ClassLoader.defineClassCond(Unknown Source)
18:10:17,335 ERROR [STDERR]     at java.lang.ClassLoader.defineClass(Unknown Source)
18:10:17,335 ERROR [STDERR]     at atg.servlet.pagecompile.ReusableClassLoader.findClass(ReusableClassLoader.java:330)
18:10:17,335 ERROR [STDERR]     at atg.servlet.pagecompile.ReusableClassLoader.findClass(ReusableClassLoader.java:286)
18:10:17,335 ERROR [STDERR]     at java.lang.ClassLoader.loadClass(Unknown Source)
18:10:17,335 ERROR [STDERR]     at atg.servlet.pagecompile.ReusableClassLoader.loadClass(ReusableClassLoader.java:602)
18:10:17,335 ERROR [STDERR]     at java.lang.ClassLoader.loadClass(Unknown Source)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pagecompile.PageProcessor.loadClass(PageProcessor.java:2704)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pagecompile.PageProcessor.loadClass(PageProcessor.java:2605)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pagecompile.PageProcessor.compilePageClass(PageProcessor.java:2479)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pagecompile.PageProcessor.getPageInfo(PageProcessor.java:1787)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pagecompile.jsp12.Jsp12PageProcessor.getPageInfo(Jsp12PageProcessor.java:324)
18:10:17,336 ERROR [STDERR]     at atg.servlet.minimal.MinimalServletContainer.compileServlet(MinimalServletContainer.java:153)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pagecompile.PageCompileServlet.service(PageCompileServlet.java:303)
18:10:17,336 ERROR [STDERR]     at atg.servlet.DynamoServlet.service(DynamoServlet.java:148)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:160)
18:10:17,336 ERROR [STDERR]     at atg.droplet.DropletEventServlet.service(DropletEventServlet.java:657)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.service(PipelineableServletImpl.java:267)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pipeline.DispatcherPipelineServletImpl.service(DispatcherPipelineServletImpl.java:253)
18:10:17,336 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.MimeTyperPipelineServlet.service(MimeTyperPipelineServlet.java:228)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.FileFinderPipelineServlet.service(FileFinderPipelineServlet.java:729)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.DispatcherPipelineServletImpl.service(DispatcherPipelineServletImpl.java:275)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.ServletPathPipelineServlet.service(ServletPathPipelineServlet.java:208)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,337 ERROR [STDERR]     at atg.security.ExpiredPasswordAdminServlet.service(ExpiredPasswordAdminServlet.java:312)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.BasicAuthenticationPipelineServlet.service(BasicAuthenticationPipelineServlet.java:513)
18:10:17,337 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,338 ERROR [STDERR]     at atg.servlet.pipeline.DynamoPipelineServlet.service(DynamoPipelineServlet.java:491)
18:10:17,338 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,338 ERROR [STDERR]     at atg.dtm.TransactionPipelineServlet.service(TransactionPipelineServlet.java:249)
18:10:17,338 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
18:10:17,338 ERROR [STDERR]     at atg.servlet.pipeline.HeadPipelineServlet.passRequest(HeadPipelineServlet.java:1271)
18:10:17,338 ERROR [STDERR]     at atg.servlet.pipeline.HeadPipelineServlet.service(HeadPipelineServlet.java:952)
18:10:17,338 ERROR [STDERR]     at atg.servlet.pipeline.PipelineableServletImpl.service(PipelineableServletImpl.java:272)
18:10:17,338 ERROR [STDERR]     at atg.nucleus.servlet.NucleusProxyServlet.service(NucleusProxyServlet.java:237)
18:10:17,338 ERROR [STDERR]     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
18:10:17,338 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
18:10:17,338 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
18:10:17,338 ERROR [STDERR]     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
18:10:17,338 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
18:10:17,339 ERROR [STDERR]     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
18:10:17,339 ERROR [STDERR]     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
18:10:17,339 ERROR [STDERR]     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
18:10:17,339 ERROR [STDERR]     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)
18:10:17,339 ERROR [STDERR]     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)
18:10:17,339 ERROR [STDERR]     at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
18:10:17,339 ERROR [STDERR]     at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
18:10:17,339 ERROR [STDERR]     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
18:10:17,339 ERROR [STDERR]     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
18:10:17,339 ERROR [STDERR]     at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
18:10:17,339 ERROR [STDERR]     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
18:10:17,339 ERROR [STDERR]     at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.internalProcess(ActiveRequestResponseCacheValve.java:74)
18:10:17,340 ERROR [STDERR]     at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:47)
18:10:17,340 ERROR [STDERR]     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
18:10:17,340 ERROR [STDERR]     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
18:10:17,340 ERROR [STDERR]     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:599)
18:10:17,340 ERROR [STDERR]     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)
18:10:17,340 ERROR [STDERR]     at java.lang.Thread.run(Unknown Source)
18:10:17,340 ERROR [PageCompileServlet] Error compiling page: /index.jhtml : can't load class: _dasadmin_3__UTF_s8._index
atg.servlet.pagecompile.PageCompileException: can't load class: _dasadmin_3__UTF_s8._index
Can You please suggest me to fix this issue.
Thanks & Regards,
Murali

I cleanedup pagebuild in both merch1 server and home path,
Even I'm getting same error.
10:50:40,098 ERROR [PageCompileServlet] Error compiling page: /index.jhtml : can't load class: _dasadmin_3__UTF_s8._index
atg.servlet.pagecompile.PageCompileException: can't load class: _dasadmin_3__UTF_s8._index
at atg.servlet.pagecompile.PageProcessor.compilePageClass(PageProcessor.java:2482)
at atg.servlet.pagecompile.PageProcessor.getPageInfo(PageProcessor.java:1787)
at atg.servlet.pagecompile.jsp12.Jsp12PageProcessor.getPageInfo(Jsp12PageProcessor.java:324)
at atg.servlet.minimal.MinimalServletContainer.compileServlet(MinimalServletContainer.java:153)
at atg.servlet.pagecompile.PageCompileServlet.service(PageCompileServlet.java:303)
at atg.servlet.DynamoServlet.service(DynamoServlet.java:148)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:160)
at atg.droplet.DropletEventServlet.service(DropletEventServlet.java:657)
at atg.servlet.pipeline.PipelineableServletImpl.service(PipelineableServletImpl.java:267)
at atg.servlet.pipeline.DispatcherPipelineServletImpl.service(DispatcherPipelineServletImpl.java:253)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.servlet.pipeline.MimeTyperPipelineServlet.service(MimeTyperPipelineServlet.java:228)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.servlet.pipeline.FileFinderPipelineServlet.service(FileFinderPipelineServlet.java:729)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.servlet.pipeline.DispatcherPipelineServletImpl.service(DispatcherPipelineServletImpl.java:275)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.servlet.pipeline.ServletPathPipelineServlet.service(ServletPathPipelineServlet.java:208)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.security.ExpiredPasswordAdminServlet.service(ExpiredPasswordAdminServlet.java:312)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.servlet.pipeline.BasicAuthenticationPipelineServlet.service(BasicAuthenticationPipelineServlet.java:513)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.servlet.pipeline.DynamoPipelineServlet.service(DynamoPipelineServlet.java:491)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.dtm.TransactionPipelineServlet.service(TransactionPipelineServlet.java:249)
at atg.servlet.pipeline.PipelineableServletImpl.passRequest(PipelineableServletImpl.java:157)
at atg.servlet.pipeline.HeadPipelineServlet.passRequest(HeadPipelineServlet.java:1271)
at atg.servlet.pipeline.HeadPipelineServlet.service(HeadPipelineServlet.java:952)
at atg.servlet.pipeline.PipelineableServletImpl.service(PipelineableServletImpl.java:272)
at atg.nucleus.servlet.NucleusProxyServlet.service(NucleusProxyServlet.java:237)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.internalProcess(ActiveRequestResponseCacheValve.java:74)
at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:47)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:599)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)
at java.lang.Thread.run(Unknown Source)
Can You please suggest any other solution.
I'm using JBOSS version : jboss-eap-5.1.2
              JDK version      : jdk1.6.0_31
Thanks & Regards,
Murali

Accesing COM port from an applet

Hello:
I am trying to develop an application that retrieves data from a VR glove and then use it to simulate the movement of it in an applet using VRML, anyway, as you can imagine, the applet is giving me problems when I try to access the serial port, it throws this particular exception :
java.lang.ExceptionInInitializerError: com/ms/security/SecurityExceptionEx
     at HandAdapter.<init>
     at HandManager.init
     at com/ms/applet/AppletPanel.securedCall0
     at com/ms/applet/AppletPanel.securedCall
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.processSentEvent
     at com/ms/applet/AppletPanel.run
     at java/lang/Thread.run
I saw a solution to this problem using a netscape library, namely netscape.security.PrivilegeManager which fixes the problem, however, I haven�t found its counterpart for Internet Explorer.
I hope you guys know of a solution to this issue given that programmers are used to fix this kind of troubles all of the time when developing in applet technology. Thanks in advance.

By default applets do not have access to the system... you can set your vm to, allow applets to have access completly to the system, not very secure. Also any one who is visiting your site will have to have this set in there VM... Unless it's for your own personal purposes...
Edit the java.policy so it contains only the following:
grant
permission java.security.AllPermission;

Very Urgent !!! Exception in looking up Local EJB from Servlet in WSAD 5.1

Hi,
I have a servlet and a local EJB. The servlet and EJB are deployed on same application server but in different J2EE applications i.e. different EAR files.
When I lookup an EJB with remote interfaces from servlet everything works fine. But when I try to lookup EJB with local interfaces from
Servlet I get following Exception.
Exception Stack: -
========================================================
avax.naming.NameNotFoundException: Context: localhost/nodes/localhost/servers/server1, name: TestLocalHome: First component in name TestLocalHome not found. Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.ipcos.WsnOptimizedNamingImpl.do_resolve_complete_info(WsnOptimizedNamingImpl.java:968)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.cosbase.WsnOptimizedNamingImplBase.resolve_complete_info(WsnOptimizedNamingImplBase.java:1399)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.WsnOptimizedNaming._NamingContextStub.resolve_complete_info(Unknown Source)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.jndicos.CNContextImpl.cosResolve(CNContextImpl.java:3491)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1519)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1480)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.jndicos.CNContextImpl.lookupExt(CNContextImpl.java:1187)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.jndicos.CNContextImpl.lookup(CNContextImpl.java:1067)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:132)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at javax.naming.InitialContext.lookup(InitialContext.java:360)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at org.apache.jsp._DomainClient._jspService(_DomainClient.java:95)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.jsp.runtime.HttpJspBase.service(HttpJspBase.java:89)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.jsp.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:344)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.serviceJspFile(JspServlet.java:669)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.service(JspServlet.java:767)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:983)
[12/8/05 14:14:05:047 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:564)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:200)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:119)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:276)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:182)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:618)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:439)
[12/8/05 14:14:05:062 IST] 7debf35b SystemErr R      at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:672)
========================================================
Please help asap.
Regds
VJ.

The ejb spec only defines local ejb access within the same application. It's possible some app servers support access from a different application but it wouldn't be portable, nor would it work within the J2EE SDK or Sun Java System App Servers. To access a local ejb from a web component or ejb , define an ejb-local-ref in the client component's standard .xml file (web.xml or ejb-jar.xml) and use the ejb-link element to specify the ejb-name of the target ejb.
--ken

Exception while accessing web application

Hi All,
I have deployed my web application on OC4J 10.1.3. But while accessing application i am geeting NullPointer Exception below is the complete stack trace for the same.
java.lang.NullPointerException
at org.mortbay.servlet.jetty.IncludableGzipFilter$IncludableGzipStream.setContentEncodingGzip(IncludableGzipFilter.java:54)
at org.mortbay.servlet.GzipFilter$GzipStream.doGzip(GzipFilter.java:482)
at org.mortbay.servlet.GzipFilter$GzipStream.checkOut(GzipFilter.java:531)
at org.mortbay.servlet.GzipFilter$GzipStream.write(GzipFilter.java:465)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.EvermindJSPWriter.writeOut(EvermindJSPWriter.java:539)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.EvermindJSPWriter.jspflush(EvermindJSPWriter.java:436)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.EvermindJSPWriter.assureSpace(EvermindJSPWriter.java:922)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.EvermindJSPWriter.javaCharsToAL32UTF8(EvermindJSPWriter.java:1058)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.EvermindJSPWriter.print(EvermindJSPWriter.java:849)
at org.apache.taglibs.standard.tag.common.fmt.MessageSupport.doEndTag(Unknown Source)
at public.login._jspService(_login.java:1817)
at com.orionserver[Oracle Containers for J2EE 10g (10.1.3.3.0) ].http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:462)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.zimbra.webClient.servlet.JspServlet.service(JspServlet.java:38)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
at com.zimbra.webClient.filters.SetHeaderFilter.doFilter(SetHeaderFilter.java:264)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:15)
at org.mortbay.servlet.UserAgentFilter.doFilter(UserAgentFilter.java:81)
at org.mortbay.servlet.GzipFilter.doFilter(GzipFilter.java:132)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:17)
at oracle.security.jazn.oc4j.JAZNFilter$1.run(JAZNFilter.java:396)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:415)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:621)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.AJPRequestHandler.run(AJPRequestHandler.java:302)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.AJPRequestHandler.run(AJPRequestHandler.java:190)
at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
at java.lang.Thread.run(Thread.java:595)

I am having the same issue has anyone found a solution to this I have deployed a WAR file to the server an I am getting this error when I try to run the application. I would appreciate some input as this is a PRODUCITON issue
the following statement is where this problems
ps = conn1.prepareStatement("<string variable>");
09/12/14 13:42:07 sfrracl: Servlet error
java.lang.NullPointerException
at sfrracl.SfrraclUpd.doPost(SfrraclUpd.java:269)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.3.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:835)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.3.0)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:341)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.3.0)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:816)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.3.0)].server.http.AJPRequestHandler.run(AJPRequestHandler.java:231)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.3.0)].server.http.AJPRequestHandler.run(AJPRequestHandler.java:136)
at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.3.0)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
at java.lang.Thread.run(Thread.java:534)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Exception while connecting to Content server from JDeveloper

I am getting following exception while connecting from jDeveloper
java.lang.NullPointerException
     at oracle.stellent.wcm.jdev.shared.connection.ConnectionContext.<init>(ConnectionContext.java:53)
     at oracle.stellent.wcm.jdev.features.rescat.IdcConnectionPanel.testAndLogin(IdcConnectionPanel.java:344)
     at oracle.stellent.wcm.jdev.features.rescat.IdcConnectionPanel.access$000(IdcConnectionPanel.java:75)
     at oracle.stellent.wcm.jdev.features.rescat.IdcConnectionPanel$1.doInBackground(IdcConnectionPanel.java:505)
     at javax.swing.SwingWorker$1.call(SwingWorker.java:277)
     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
     at java.util.concurrent.FutureTask.run(FutureTask.java:138)
     at javax.swing.SwingWorker.run(SwingWorker.java:316)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
     at java.lang.Thread.run(Thread.java:662)
please Help
~Hari

Ok. I found out why it is happening.
If I follow the section 3.1.2 and setup the site studio connection then everything is fine
3.1.2 Creating a Content Server Connection
http://download.oracle.com/docs/cd/E17904_01/doc.1111/e13650/ssxa_creatingsites.htm#CIHJGHFC
If I try to create a content server connection from file->new->content server connection then I get a null pointer exception.
I am sure someone from Oracle will fix it soon. For now all is well with Site Studio.

Security Exception while accessing Administration Portal Page

Hi all
I am getting following exception while trying to access the login page of WebLogic Administration Portal. Please help me out
Error 500--Internal Server Error
java.security.AccessControlException: access denied (java.io.FilePermission C:\bea\weblogic81\samples\domains\portal\portalServer\.wlnotdelete\EJBCompilerCache\-w3xmqrhp3amn\com\bea\p13n\usermgmt\profile\ProfileFactory.class read)
     at java.security.AccessControlContext.checkPermission(AccessControlContext.java:269)
     at java.security.AccessController.checkPermission(AccessController.java:401)
     at java.lang.SecurityManager.checkPermission(SecurityManager.java:524)
     at java.lang.SecurityManager.checkRead(SecurityManager.java:863)
     at java.io.File.exists(File.java:678)
     at weblogic.utils.classloaders.ClasspathClassFinder.getSourcesInternal(ClasspathClassFinder.java:311)
     at weblogic.utils.classloaders.ClasspathClassFinder.getSource(ClasspathClassFinder.java:266)
     at weblogic.utils.classloaders.MultiClassFinder.getSource(MultiClassFinder.java:80)
     at weblogic.utils.classloaders.MultiClassFinder.getSource(MultiClassFinder.java:69)
     at weblogic.utils.classloaders.CodeGenClassFinder.getSource(CodeGenClassFinder.java:30)
     at weblogic.utils.classloaders.MultiClassFinder.getClassSource(MultiClassFinder.java:61)
     at weblogic.utils.classloaders.CodeGenClassFinder.getClassSource(CodeGenClassFinder.java:24)
     at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:383)
     at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:182)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
     at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:224)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
     at com.bea.p13n.servlets.PortalServletFilter.doFilter(PortalServletFilter.java:266)
     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
     at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6724)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
     at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)
     at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
Thanks

Well, have you tried the obvious to add the following permission to your web server's policy file?
grant "file:<wherever my servlet resides>\myservlet.jar" {
permission java.io.FilePermission "c:\j2sdk1.4.1\jre\lib\javax.comm.properties", "write,delete";
}

IllegalArgumentException while accessing an EJB with a servlet client

Dear All,
Hey,
I am facing some problems while accessing a deployed stateless ejb. Following is how my application is being accessed:
WEBAPP CLIENT
     caller.html ------->> DisplayServletClient --------->> DisplayServlet
(Simple HTML Page)          (Servlet which performs lookup)     (The actual bean)
CONSOLE CLIENT
DisplayConsoleClient --------->> DisplayServlet
(Simple Console Client)     (The actual bean)
I am using the J2EE reference implementation, the ejb bean is successfully deployed. The console client successfully, access the ejb. But when I try to access the ejb using the webapp client, I get the following exception:
======= EXCEPTION ENCOUNTERED ============
Application DisplayApp deployed.
Servlet Entered
HTML Content Type Set
PrintWriter Object Created
Context Object Created
Exception in Servlet Client Code: java.lang.IllegalArgumentException: Unknown co
mponent type
java.lang.IllegalArgumentException: Unknown component type
at com.sun.enterprise.naming.NamingManagerImpl.getComponentType(NamingMa
nagerImpl.java:670)
at com.sun.enterprise.naming.NamingManagerImpl.getMangledIdName(NamingMa
nagerImpl.java:708)
at com.sun.enterprise.naming.NamingManagerImpl.getComponentIdInternal(Na
mingManagerImpl.java:680)
at com.sun.enterprise.naming.NamingManagerImpl.getComponentId(NamingMana
gerImpl.java:313)
at com.sun.enterprise.naming.java.javaURLContext.getComponentContext(jav
aURLContext.java:397)
at com.sun.enterprise.naming.java.javaURLContext.lookup(javaURLContext.j
ava:51)
at javax.naming.InitialContext.lookup(InitialContext.java:350)
at DisplayServletClient.service(DisplayServletClient.java:27)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServl
et.java:428)
at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java
:180)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.access$0(ApplicationF
ilterChain.java:197)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilt
erChain.java:176)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:172)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:243)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline
.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:215)
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.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:
2314)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:164)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline
.java:566)
at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.ja
va:368)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline
.java:564)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:163)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline
.java:566)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcesso
r.java:995)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.ja
va:1088)
at java.lang.Thread.run(Thread.java:484)
======== EXCEPTION END ===========
Tweaking with the servlet client code, I have discovered that it is failing to perform a correct lookup. Can anybody suggest any remedy? My Source code is below:
=========================================================
============ Remote Interface START ==============
// The DisplayApp Remote Interface File
import javax.ejb.*;
import java.rmi.*;
public interface Display extends EJBObject
     public String display() throws RemoteException;
============ Remote Interface END ==============
============ Home Interface START ==============
// The DisplayApp Home Interface File
import javax.ejb.*;
import java.rmi.*;
public interface DisplayHome extends EJBHome
     public Display create() throws RemoteException, CreateException;
============ Home Interface END ==============
============ Bean Class START ==============
// The DisplayApp Bean Class File
import javax.ejb.*;
import java.rmi.*;
public class DisplayBean implements SessionBean
     public String display() throws RemoteException
          System.out.println("The Server Side Response");
          return "Hello, Me a New Friend";
     public void ejbCreate(){}
     public void ejbRemove(){}
     public void ejbActivate(){}
     public void ejbPassivate(){}
     public void setSessionContext(SessionContext ctx){}
============ Bean Class END ==============
========== Console Client Class START ======
// The Display Console Client Class File
import javax.ejb.*;
import javax.rmi.*;
import javax.naming.*;
import Display;
import DisplayHome;
public class DisplayConsoleClient
     public DisplayConsoleClient()
          try
               Context initial=new InitialContext();
               Object objref=initial.lookup("java:comp/env/DisplayJNDI");
               DisplayHome home=(DisplayHome)PortableRemoteObject.narrow(objref, DisplayHome.class);
               Display ref=home.create();
               System.out.println("Client Side: "+ref.display());
               ref.remove();
          catch(Exception ex)
               System.out.println("Exception in Client Code: "+ex);
               ex.printStackTrace();
     public static void main(String args[])
          new DisplayConsoleClient();
========== Console Client Class END ======
========== Servlet Client Class START ======
// The DisplayApp Servlet Client Class File
import javax.ejb.*;
import javax.rmi.*;
import javax.naming.*;
import Display;
import DisplayHome;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class DisplayServletClient extends HttpServlet
     private PrintWriter out;
     public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
          try
          System.out.println("Servlet Entered");
          response.setContentType("text/html");
          System.out.println("HTML Content Type Set");
          out=response.getWriter();
          System.out.println("PrintWriter Object Created");
          Context initial=new InitialContext();
          System.out.println("Context Object Created");
          Object objref=initial.lookup("java:comp/env/ejb/DisplayWEBJNDI");
          System.out.println("Lookup Done Successfully");
          DisplayHome home=(DisplayHome)PortableRemoteObject.narrow(objref, DisplayHome.class);
          System.out.println("Home Object Created");
          Display ref=home.create();
          System.out.println("Remote Object Created");
          out.println("<html><title>The Results Page</title>");
          out.println("<body<hr>");
          out.println("<h1>The Client Side Response is: ");
          out.println(ref.display());
          out.println("</h1>");
          out.println("<hr>");
          out.println("</body></html>");
          System.out.println("Responses Done");
          out.flush();
          System.out.println("Output Stream Flushed");
          ref.remove();
          System.out.println("Remote Object Removed");
          catch(Exception ex)
               System.out.println("Exception in Servlet Client Code: "+ex);
               ex.printStackTrace();
========== Servlet Client Class END ======
========== Calling HTML File START ======
<html>
<body>
<hr>
<form method="get" action="/servlet/DisplayServletClient">
<input type="submit" name="submit" value="Call Now!">
</form>
<hr>
</body>
</html>
========== Calling HTML File END ======
=========================================================
Since, the descriptors were automatically generated, I have not included them here. Also, I did not build the war, jar, ear files myself, they were automatically generated by the deploytool.
Please help!!
Thanks & Bye,
Tualha Khan

Hey,
This was the latest code snippet which I used in the Servlet file.
========================
try
          System.out.println("Servlet Entered");
          response.setContentType("text/html");
          System.out.println("HTML Content Type Set");
          out=response.getWriter();
          System.out.println("PrintWriter Object Created");
          InitialContext initial=new InitialContext();
          System.out.println("Context Object Created");
          Object objref=initial.lookup("DisplayWEBJNDI");
          System.out.println("Lookup Done Successfully");
          DisplayHome home=(DisplayHome)PortableRemoteObject.narrow(objref, DisplayHome.class);
          System.out.println("Home Object Created");
          Display ref=home.create();
          System.out.println("Remote Object Created");
          out.println("<html><title>The Results Page</title>");
          out.println("<body<hr>");
          out.println("<h1>The Client Side Response is: ");
          out.println(ref.display());
          out.println("</h1>");
          out.println("<hr>");
          out.println("</body></html>");
          System.out.println("Responses Done");
          out.flush();
          System.out.println("Output Stream Flushed");
          ref.remove();
          System.out.println("Remote Object Removed");
========================
The Response was
========================
Servlet Entered
HTML Content Type Set
PrintWriter Object Created
Context Object Created
Exception in Servlet Client Code: javax.naming.NameNotFoundException: DisplayWEB
JNDI not found
javax.naming.NameNotFoundException: DisplayWEBJNDI not found
<<no stack trace available>>
========================
So what else should I do???
Thanks & Waiting,
Tualha Khan

Getting error while calling ejb business methods from servlet

Hi
Iam getting error when i try to call a ejb method from servlet.Error is
"com.netscape.server.eb.UncheckedException: unchecked exception nested exception is:java.lang.NullPointerException".
I build the application and deployed it successfully.Iam using IAS 6.O with windows NT 4.0.
This is just a method which takes values from database and return as an array of bean to servlet.
Any help on this.Thanks Shank

Hi
I was using the session bean.Your suggestion helped me a lot.Perfect.
I debug my program and found that from ejbCreate()exception is getting.
I was getting the datasource object thro ejb create() initialisation.
Somehow the look up jndi which i mentioned was not interpretting from ejb-jar.xml ias-ejb-jar.xml and datasource ref .Due to this iam getting jndi Namenotfound exception which in turns to null pointer as datasource is getting null.
when i hardcoded in the ejb the the jndi name for datasource it is working fine.Bit worried all the existing ejbs working with the xml referenced datasource and jndi,but when i added a new ejb with same properties it is failing to get the jndi name.
Piece of code from ias-ejb-jar.xml
<resource-ref>
          <res-ref-name>myDataSource</res-ref-name>
          <jndi-name>jdbc/nb/myData</jndi-name>
</resource-ref>
Piece of code from ejb-jar.xml
<resource-ref>
          <res-ref-name>myDataSource</res-ref-name>
          <res-type>javax.sql.DataSource</res-type>
          <res-auth>Container</res-auth>
</resource-ref>
Thanks a lot meka

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