Well that usually means that there is already a file/node with the same name so you can't create a new one at the same place. Are you sure there isn't already a node with that name? Perhaps created by someone else? Also it would be unusual to create a JSP under /content - normally all JSPs would be ...

When i creat a new jsp file and save the file  , i get the following error on CRXDE lite  :  Could not save changes. Received 409 (Conflict) for saving changes in workspace crx.default. This node already exists: /content/TrainingSite/contentpage.jsp Can anybody please suggest the cause of the proble...

Yes, you can create AEM applications that can interact with relational databases such as MySQL. For information, see Creating an Adobe CQ web application that uses MySQL.

Can I integrate Adobe AEM with relational databases?

http://sling.apache.org/site/servlets.html http://wemcode.wemblog.com/create-servlet And from JSP just call it using servlet path. Yogeshwww.wemblog.com

generally we specify in action attribute  in cq how to specify the servlet path what should be the folder structure plz explain with an example

You can dynamically modify the JCR using the JCR Java API or the Sling Post Servlet.For information about using the JCR API, see Programmatically Accessing Adobe CQ Content using the JCR API.

How can I modify the JCR?

Yes, you can use AEM to build social community content such as Forums, Blogs, Calendars and Events, and so on. For information, see Introduction to Social Communities.

Can I build an online social community?