Error 500--Internal Server Error in Oracle SPARQL Service Endpoint

Question

Hi,
I followed the instructions of "Setting Up the SPARQL Service" in the developer's guide. However, after I finished all the steps and click "Submit Query" button in Oracle SPARQL Service Endpoint using Joseki page, I got this error message:
Error 500--Internal Server Error
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.5.1 500 Internal Server Error
The server encountered an unexpected condition which prevented it from fulfilling the request.
I can't figure out what's wrong with the service. Can anybody pls help me solve the problem? Thanks in advance.
Kind Regards,
Hong

Answer 1

hi zhe,
i installed the right version of jena adapter for oracle 11.2.01 and recreated the data source in WLS. however, i still got the same error when click joseki sparql service end point. but, the first error message is different than the second time. it is shown below:
first time:
Error 500--Internal Server Error
java.lang.NoSuchMethodError: com.hp.hpl.jena.sparql.util.StringUtils.join
(Ljava/lang/String;[Ljava/lang/String;)Ljava/lang/String;
     at org.joseki.Configuration.makeQuery(Configuration.java:827)
     at org.joseki.Configuration.readConfFile(Configuration.java:176)
     at org.joseki.Configuration.(Configuration.java:82)
     at org.joseki.Dispatcher.setConfiguration(Dispatcher.java:130)
     at org.joseki.Dispatcher.initServiceRegistry(Dispatcher.java:100)
     at org.joseki.http.Servlet.init(Servlet.java:112)
     at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run
(StubSecurityHelper.java:283)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs
(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs
(SecurityManager.java:121)
     at weblogic.servlet.internal.StubSecurityHelper.createServlet
(StubSecurityHelper.java:64)
     at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance
(StubLifecycleHelper.java:58)
     at weblogic.servlet.internal.StubLifecycleHelper.
(StubLifecycleHelper.java:48)
     at weblogic.servlet.internal.ServletStubImpl.prepareServlet
(ServletStubImpl.java:539)
     at weblogic.servlet.internal.ServletStubImpl.execute
(ServletStubImpl.java:243)
     at weblogic.servlet.internal.ServletStubImpl.execute
(ServletStubImpl.java:183)
     at weblogic.servlet.internal.WebAppServletContext
$ServletInvocationAction.doIt(WebAppServletContext.java:3686)
     at weblogic.servlet.internal.WebAppServletContext
$ServletInvocationAction.run(WebAppServletContext.java:3650)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs
(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs
(SecurityManager.java:121)
     at weblogic.servlet.internal.WebAppServletContext.securedExecute
(WebAppServletContext.java:2268)
     at weblogic.servlet.internal.WebAppServletContext.execute
(WebAppServletContext.java:2174)
     at weblogic.servlet.internal.ServletRequestImpl.run
(ServletRequestImpl.java:1446)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
thanks a lot.
regards,
hong