My World of experiments with Technology

I developed an application with Flex as UI and Java as backend. BlazeDS as the integration between the two and the application was deployed on Tomcat 7 server.  The initial release was on simple http so there were no issues until recently when we were asked to move all the applications over to SSL for security reasons. The SSL configuration on Tomcat is fairly easy and i was able to access my Flex application on HTTPS with no issues. However there was a strange issue that was occurring everytime the application was left idle for some time. Upon catching the error message it was: faultString:'Channel disconnected'  faultDetail:'Channel disconnected before an acknowledgement was received'. I tried adding few additional configuration parameters to services-config.xml such as:  <login-after-disconnect>true</login-after-disconnect>  But it didnt work. Finally this is the resolution which took care of this channel disconnect issue permanently: ...

While trying to import the Access DB into a MS SQL Server, you may encounter the following exception: Access Object Collector error: Database      Unable to cast COM object of type 'Microsoft.Office.Interop.Access.Dao.DBEngineClass' to interface type 'Microsoft.Office.Interop.Access.Dao._DBEngine'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00000021-0000-0010-8000-00AA006D2EA4}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).      An error occurred while loading database content. Resolution : The issue is the DAO related DLL is not registered in the system. Please ensure that you have this DLL at  C:\Program Files\Common Files\Microsoft Shared\DAO\Dao360.dll And then try to register it using the following command on a command prompt: regsvr32  C:\Program Files\Common Files\Microsoft Shared\DAO\Dao360.dll 9 out of 1...

Server Error in Application "DEFAULT WEB SITE" Internet Information Services 7.0 Error Summary HTTP Error 500.24 - Internal Server Error An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode. Detailed Error Information Module ConfigurationValidationModule Notification BeginRequest Handler StaticFile Error Code 0x80070032 Requested URL http://xxx:80/appName Physical Path C:\inetpub\wwwroot\ appName Logon Method Not yet determined Logon User Not yet determined Most likely causes: ·          system.web/identity@impersonate is set to true. Things you can try: ·          If the application supports it, disable client impersonation. ·          If you are certain that it is OK to ignore this error, it ca...

I encountered this weird exception on X server even after configuring the Tomcat  configuration file properly same as i did for other server  Y where it is working fine. Solution is mentioned after the exception log: May 24, 2011 5:23:45 PM org.apache.catalina.startup.SetAllPropertiesRule begin WARNING: [SetAllPropertiesRule]{Server/Service/Connector} Setting property 'keystoreFile' to 'C:\Program Files\Java\jdk1.6.0_25\keystore\.keystore' did not find a matching property. May 24, 2011 5:23:45 PM org.apache.catalina.startup.SetAllPropertiesRule begin WARNING: [SetAllPropertiesRule]{Server/Service/Connector} Setting property 'keystorePass' to 'changeit' did not find a matching property. May 24, 2011 5:23:45 PM org.apache.catalina.startup.SetAllPropertiesRule begin WARNING: [SetAllPropertiesRule]{Server/Service/Connector} Setting property 'clientAuth' to 'false' did not find a matching property. May 24, 2011 5:23:46 PM org.apache.coyote.h...

For publishing the WCF based web services on IIS 7.0, you need to have the Frontpage server extensions for IIS7.0. You can download the extension here: http://www.iis.net/community/default.aspx?tabid=34&g=6&i=1630 After the installation, visit the following site to extend the virtual server. http://test01:3610/fpadmdll.dll?page=fpadmin.htm P.S: The hostname and port may change in your case. You can also launch this adminstrator page by Start->All programs -> Administrative Tools -> Microsoft SharePoint Administrator which will open the Server Administration page. Once you are there, you can click "extend" to extend your virtual server. Please ensure that you are opening this internet browser as an Administrator. Otherwise you may receive the following error: Cannot create folder "_vti_pvt". iis7 You can open the IE as an administrator by selecting the option "Run as Administrator" on the context menu.

I have previously developed several web services in Netbeans 6.9 IDE with much ease and flexibility. But today when i launched Netbeans 6.9 today, it downloaded some updates by itself and all my existing web services were showing build errors. The following are couple of exceptions that i noted down: java.lang.ClassNotFoundException: There's no JAXB 2.2 API in the classpath C:\Projects\proj_name\nbproject\jaxws-build.xml:22: taskdef class com.sun.tools.ws.ant.WsImport cannot be found taskdef A class needed by class com.sun.tools.ws.ant.WsImport cannot be found: org/apache/tools/ant/taskdefs/MatchingTask While i kept on fixing one after another exception, here is the permanent fix that resolved all the issues: I had several Jars inside this directory: C:\Program Files\Java\jdk1.6.0_24\jre\lib\endorsed like webservices-api.jar, jaxb-api.jar, jaxws-api.jar, jaxb-xjc.jar, jaxws-tools-2.0.jar, jaxws-tools-2.1.4.jar. There was an existing issue that was raised here: http://j...

While calling the Primavera API server from a remote client, i was getting this exception: com.primavera.integration.network.ServiceNotBoundException: rmi/RemoteSession at com.primavera.integration.network.RMIInstanceFactory.getRemoteInstance(RMIInstanceFactory.java:97) The default port 9099 is in listening mode on the API server. The API server is deployed on JBOSS applications server. After a careful study of the configuration and the admin guide, here is how i resolved this issue: 1. Unlike the previous versions, the RMI standard Service Port needs to be set explicitly to a valid port value if the RMI server is going to be access through a firewall. (If the server will be accessed across a firewall, you must set this to a specific port.) 2. This port must be different than RMI Registry port. You will use the Registry port in all your client side method calls. 3. Setup a inbound firewall rule for both these ports RMI Standard service port as well as RMI Registry port. 4. ...