Connection problems in a Web Application
hi everybody.
I'm developing a struts-based Web Application to investigate an Oracle 9.2 DB, using Exadel Studio / Eclipse and Tomcat 5.0.
Here is the problem: I've made a class to test data-displaying, which simply connects to db using oci8 and returns a resultset, using the base procedure:
// load driver
Class.forName("oracle.jdbc.driver.OracleDriver");
// open connection
Connection conn=DriverManager.getConnection(...);
Statement st = conn.createStatement();
rs = st.executeQuery(sql);Now, everytime I call this method from my Action, to get back the resultset and display it in my jsp, I get a ClassNotFoundException on the Class.forName instruction.
Note that classes12.jar is correctly mounted, in fact if I run stand-alone the class containing this method, it connects without problems and returns the expected results. The exception is raised ONLY when the entire web application is running and the method is triggered by the struts Action.
Can anyone help me please?
Thank you in advance, I'm crushing my head on this for 2 weeks!
Emanuele
This means that your driver jar is unavailable to your web application; I'm pretty sure that Tomcat overrides the classpath set by your IDE. You can add application jars to the WEB-INF/lib of your web application. You can also set a container classpath that points to the jars...
here's some instructions for add the jars for cactus to Tomcat; just substitute your driver jars in these instructions.
http://jakarta.apache.org/cactus/integration/howto_tomcat.html
Also, classes12.jar is for Java 1.2 and Java 1.3 Since you are using Struts, I suspect you're also using Java 1.4 or Java 1.5 and you should probably be developing with the appropriate driver (classes12.jar does mostly work with Java 1.4, but Oracle doesn't support it.)
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"Michael Li" <[email protected]> wrote:
>Hi all,
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>===
>"Evgenya Borisenko" <[email protected]> wrote in message
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><ExecuteThread: '11' for queue: 'default'> <> <> <101047>
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><ExecuteThread: '11' for queue: 'default'> <> <> <101047>
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> pageContext.handlePageException(__ee);
> ^
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>er\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB
>-INF\lib\993367393673cos.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\appli
>cations\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evg
>yServer_WebApp_evgyServer\WEB-INF\lib\993367393763dbConnBroker.jar;D:\bea\wl
>server6.1_beta\.\config\mydomain\applications\.wlnotdelete_evgyServer\wl_com
>p51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-INF\lib\
>993367393773jasper.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\application
>s\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServe
>r_WebApp_evgyServer\WEB-INF\lib\993367393823java40.jar;D:\bea\wlserver6.1_be
>ta\.\config\mydomain\applications\.wlnotdelete_evgyServer\wl_comp51442\WEB-I
>NF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-INF\lib\993367394103
>jaxp.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\applications\.wlnotdelete
>_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyS
>erver\WEB-INF\lib\993367394133jsdt.jar;D:\bea\wlserver6.1_beta\.\config\mydo
>main\applications\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgy
>Server_evgyServer_WebApp_evgyServer\WEB-INF\lib\993367394263junit.jar;D:\bea
>\wlserver6.1_beta\.\config\mydomain\applications\.wlnotdelete_evgyServer\wl_
>comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-INF\l
>ib\993367394324Jwap-0.7.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\applic
>ations\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgy
>Server_WebApp_evgyServer\WEB-INF\lib\993367394354log.jar;D:\bea\wlserver6.1_
>beta\.\config\mydomain\applications\.wlnotdelete_evgyServer\wl_comp51442\WEB
>-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-INF\lib\9933673943
>74mail.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\applications\.wlnotdele
>te_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evg
>yServer\WEB-INF\lib\993367394404orajdbc816-12.jar;D:\bea\wlserver6.1_beta\.\
>config\mydomain\applications\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_t
>mp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-INF\lib\993367394484parse
>r.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\applications\.wlnotdelete_ev
>gyServer\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServ
>er\WEB-INF\lib\993367394514servlet.jar;D:\bea\wlserver6.1_beta\.\config\mydo
>main\applications\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgy
>Server_evgyServer_WebApp_evgyServer\WEB-INF\lib\993367394544webserver.jar;D:
>\bea\wlserver6.1_beta\.\config\mydomain\applications\.wlnotdelete_evgyServer
>\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-I
>NF\lib\993367394584xalan.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\appli
>cations\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evg
>yServer_WebApp_evgyServer\WEB-INF\lib\993367394634xerces.jar;D:\bea\wlserver
>6.1_beta\.\config\mydomain\applications\.wlnotdelete_evgyServer\wl_comp51442
>\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-INF\lib\993367
>394914_log.jar;D:\bea\wlserver6.1_beta\.\config\mydomain\applications\.wlnot
>delete_evgyServer\wl_comp51442\WEB-INF\classes;D:\bea\wlserver6.1_beta\confi
>g\mydomain\applications\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_wa
>r_evgyServer_evgyServer_WebApp_evgyServer;D:\bea\wlserver6.1_beta\.\config\m
>ydomain\applications\.wlnotdelete_evgyServer\wl_comp51442\WEB-INF\_tmp_war_e
>vgyServer_evgyServer_WebApp_evgyServer\WEB-INF\lib\jaxp.jar;D:\bea\wlserver6
>..1_beta\.\config\mydomain\applications\.wlnotdelete_evgyServer\wl_comp51442\
>WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\WEB-INF\lib\xerces.
>jar;D:\bea\wlserver6.1_beta\.\config\mydomain\applications\.wlnotdelete_evgy
>Server\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer
>\WEB-INF\lib\crimson.jar;d:\bea\jdk131\jre\lib\rt.jar;d:\bea\jdk131\jre\lib\
>i18n.jar;d:\bea\jdk131\jre\lib\sunrsasign.jar;d:\bea\jdk131\jre\classes;.;D:
>\bea\wlserver6.1_beta\config\mydomain\applications\WebApp_evgyServer\WEB-INF
>\lib\xerces.jar;D:\bea\wlserver6.1_beta\config\mydomain\applications\WebApp_
>evgyServer\WEB-INF\lib\xalan.jar;D:\bea\wlserver6.1_beta\config\mydomain\app
>lications\WebApp_evgyServer\WEB-INF\lib\mail.jar;D:\bea\wlserver6.1_beta\con
>fig\mydomain\applications\WebApp_evgyServer\WEB-INF\lib\activation.jar;.\lib
>\weblogic_sp.jar;.\lib\weblogic.jar;D:\bea\wlserver6.1_beta\config\mydomain\
>applications\WebApp_evgyServer\WEB-INF\lib\bsf.jar;D:\bea\wlserver6.1_beta\c
>onfig\mydomain\applications\WebApp_evgyServer\WEB-INF\lib\concurrent_classes
>..jar;D:\bea\wlserver6.1_beta\config\mydomain\applications\WebApp_evgyServer\
>WEB-INF\lib\cos.jar;D:\bea\wlserver6.1_beta\config\mydomain\applications\Web
>App_evgyServer\WEB-INF\lib\dbConnBroker.jar;D:\bea\wlserver6.1_beta\config\m
>ydomain\applications\WebApp_evgyServer\WEB-INF\lib\log.jar;D:\bea\wlserver6.
>1_beta\config\mydomain\applications\WebApp_evgyServer\WEB-INF\lib\orajdbc816
>-12.jar;D:\bea\wlserver6.0\config\mydomain\applications\WebApp_evgyServer\WE
>B-INF\classes, -d,
>D:\bea\wlserver6.1_beta\config\mydomain\applications\.wlnotdelete_evgyServer
>\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer,
>D:\bea\wlserver6.1_beta\config\mydomain\applications\.wlnotdelete_evgyServer
>\wl_comp51442\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\jsp_s
>ervlet\_ngroot\_web\__index.java])
> at
>weblogic.utils.compiler.CompilerInvoker.compileMaybeExit(CompilerInvoker.jav
>a:575)
> at
>weblogic.utils.compiler.CompilerInvoker.compile(CompilerInvoker.java:354)
> at weblogic.servlet.jsp.JspStub.compilePage(JspStub.java:360)
> at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:181)
> at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:149)
> at
>weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:34
>4)
> at
>weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
>:240)
> at
>weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
>:284)
> at
>weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
>:200)
> at
>weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
>ntext.java:2279)
> at
>weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
>:1923)
> at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)
> at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
>
>
>hope that helps.
>10x alot.
>"Srinagesh Susarla" <[email protected]> wrote in message
>news:[email protected]...
>can u send the server side error-message!
>thanks
>nagesh
>Evgenya Borisenko wrote:
>Hi, currently we use Weblogic 6.0 and i decided to try Weblogic 6.1 beta.
>So
>i deployed our application which was working on Weblogic 6.0 on the newly
>installed Weblogic 6.1 beta. Now when i try to access my application
>i
>recieve the following error page: Compilation of
>'D:\bea\wlserver6.1_beta\config\mydomain\applications\.wlnotdelete_evgyServe
>r\wl_comp28255\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\jsp_
>servlet\_ngroot\_web\__index.java' failed:
>
>D:\bea\wlserver6.1_beta\config\mydomain\applications\.wlnotdelete_evgyServer
>\wl_comp28255\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\jsp_s
>ervlet\_ngroot\_web\__index.java:165:
>handlePageException(java.lang.Exception) in javax.servlet.jsp.PageContext
>cannot be applied to (java.lang.Throwable)
>(No more information available, probably caused by another error)
>
>
>Full compiler error(s):
>D:\bea\wlserver6.1_beta\config\mydomain\applications\.wlnotdelete_evgyServer
>\wl_comp28255\WEB-INF\_tmp_war_evgyServer_evgyServer_WebApp_evgyServer\jsp_s
>ervlet\_ngroot\_web\__index.java:165:
>handlePageException(java.lang.Exception) in javax.servlet.jsp.PageContext
>cannot be applied to (java.lang.Throwable)
> pageContext.handlePageException(__ee);
> ^
>1 error
>
>
>Wed Jun 20 17:27:28 EEST 2001 Does anyone know what could cause the problem
>? Any help will be appreciated.Bybye.
>
>
-
*Connection problems Sap A Java Application*
Hi Gurus,
I have a problem. I'm riding the part of the JCO SERVER for SAP from sending information to a Java application.
I created the RFC destination of the type TCP / IP and I have registered my JAVA application in the visual administrator. This application java is already deployed listening to SAP and I can think of the following error when I run a BAPI created in the ABAP fate that I created.
It's not that I can think of that might be.
Or if someone was going another way of doing it from using sap we can send things to JAVA without having to java call the BAPI please help.
Errores tiempo ejecucióCALL_FUNCTION_REMOTE_ERROR
"JCO.Server could not find server function 'Z_BAPI_RFC'"
¿Qué ha sucedido?
Error in ABAP application program.
The current ABAP program "Z_BAPI_RFC====================FT" had to be terminated because one of the statements could not be
executed.
This is probably due to an error in the ABAP program.
The error occurred in an RFC call to another system.
The target system has also written a short dump.
Consult this short dump for more precise information about
the cause of the error.Please note that this forum is dedicated to all other development-related questions which are not directly addressed by other forums. This includes Business Objects SDKs, products, or technologies which do not fall under BusinessObjects Enterprise, BusinessObjects Edge, Crystal Reports Server, or Crystal Reports (for example Desktop Intelligence SDK, Universe Designer SDK, Portal Integration Kits, Java User Function Libraries, and other third party technologies or development languages).
As your query relates to an SAP product, please post to an SAP forum.
Ludek -
Error deploying Web application
Hello Everyone, i have a problem with my web application that is not able to be deployed.
the first time i deployed the application everything worked correctly i performed the contex lookup with no problem as was able to connect to the EJB application, i performed some changes, and now everytime i tried to deploy again the application i get this error
[#|2010-02-12T23:03:34.661+0100|INFO|sun-appserver9.1|javax.enterprise.system.tools.deployment|_ThreadID=23;_ThreadName=Thread-434;Servlet;WebServiceInterface;http://vmlinux:8024/WebServiceInterface/WebServiceInterface;|DPL5306:Servlet Web Service Endpoint [WebServiceInterface] listening at address [http://vmlinux:8024/WebServiceInterface/WebServiceInterface]|#]
[#|2010-02-12T23:03:38.107+0100|SEVERE|sun-appserver9.1|javax.enterprise.system.tools.deployment|_ThreadID=23;_ThreadName=Thread-434;_RequestID=3610621f-da38-477d-b37a-088311a00a42;|Exception occured in J2EEC Phase
com.sun.enterprise.deployment.backend.IASDeploymentException: Deployment Error -- Could not resolve a persistence unit corresponding to the persistence-context-ref-name [com.testing.myEJBapplication.ReferenceServiceLocalBean/entityManager] in the scope of the module called [product/servers/glassfish/domains/domain1/applications/j2ee-modules/WebServiceInterface]. Please verify your application.
at com.sun.enterprise.deployment.BundleDescriptor.findReferencedPUsViaPCRefs(BundleDescriptor.java:702)
at com.sun.enterprise.deployment.WebBundleDescriptor.findReferencedPUs(WebBundleDescriptor.java:722)
at com.sun.jdo.spi.persistence.support.ejb.ejbc.PersistenceProcessor.getAllPersistenceUnitDescriptors(PersistenceProcessor.java:171)
at com.sun.jdo.spi.persistence.support.ejb.ejbc.PersistenceProcessor.processApplication(PersistenceProcessor.java:132)
at com.sun.jdo.spi.persistence.support.ejb.ejbc.DeploymentEventListenerImpl.processApplication(DeploymentEventListenerImpl.java:211)
at com.sun.jdo.spi.persistence.support.ejb.ejbc.DeploymentEventListenerImpl.processEvent(DeploymentEventListenerImpl.java:172)
at com.sun.jdo.spi.persistence.support.ejb.ejbc.DeploymentEventListenerImpl.notifyDeploymentEvent(DeploymentEventListenerImpl.java:122)
at com.sun.enterprise.deployment.backend.DeploymentEventManager.notifyDeploymentEvent(DeploymentEventManager.java:79)
at com.sun.enterprise.deployment.backend.ModuleDeployer.handlePostDeployEvent(ModuleDeployer.java:636)
at com.sun.enterprise.deployment.backend.ModuleDeployer.postDeploy(ModuleDeployer.java:625)
at com.sun.enterprise.deployment.backend.ModuleDeployer.doRequestFinish(ModuleDeployer.java:188)
at com.sun.enterprise.deployment.phasing.J2EECPhase.runPhase(J2EECPhase.java:191)
at com.sun.enterprise.deployment.phasing.DeploymentPhase.executePhase(DeploymentPhase.java:108)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.executePhases(PEDeploymentService.java:919)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:279)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:788)
at com.sun.enterprise.management.deploy.DeployThread.deploy(DeployThread.java:187)
at com.sun.enterprise.management.deploy.DeployThread.run(DeployThread.java:223)
|#]
any ideas for this?? Thank you in advance regards
Edited by: White_Merovingian on Feb 13, 2010 5:55 AMyeah these stacktraces are big scary blobs of text, but somewhere hidden among all the nonsense there is always the little piece of information you need:
"Could not resolve a persistence unit corresponding to the persistence-context-ref-name [com.testing.myEJBapplication.ReferenceServiceLocalBean/entityManager]"
So you are referring to a persistence unit in ReferenceServiceLocalBean that does not seem to exist. Do you have your persistence.xml deployed in the META-INF directory of the EJB module? Does it contain a persistence unit with the name that is declared in the bean? -
Web Application and Serialization
Hi, i have a problem with a web application that is running on an Application server (BEA WebLogic 7.0). I have only the war file of the web application and i must know if in this war there is a class that is not serializable.
How can i find it ? Is there a tool that can help me to find not serializable classes ?
Thanks.
claudiozx2006One way to do that is to decompile Java classes with Java decompiler and see which one doesn't implement Serializable interface. Here is a link to a good decompiler: http://www.kpdus.com/jad.html
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