JNDI lookup is not happening when we bind object in one project and look up from second

Question

I have two java projects, Test1 and Test2 , in Test1 project I have a servlet with the below code

InitialContext initialContext=new InitialContext();
Class.forName("com.mysql.jdbc.Driver");
Connection connection=DriverManager.getConnection("jdbc:mysql://localhost:3306/lntdb","root","root");
initialContext.bind("conn", connection);
response.getWriter().println("Bound to JNDI "+initialContext.lookup("conn"));`

the above code is binding MYSQL database connection object to JNDI with name conn , then from Test2 project I am trying to retrieve the connection object. Test2 also having a servlet with below code

InitialContext initialContext=new InitialContext();
response.getWriter().println(initialContext.lookup("java:comp/env/conn"));

But I am getting exception the stack trace is below

javax.naming.NameNotFoundException: Name [conn] is not bound in this Context. Unable to find [conn]. at org.apache.naming.NamingContext.lookup(NamingContext.java:820) at org.apache.naming.NamingContext.lookup(NamingContext.java:154) at org.apache.naming.NamingContext.lookup(NamingContext.java:831) at org.apache.naming.NamingContext.lookup(NamingContext.java:154) at org.apache.naming.NamingContext.lookup(NamingContext.java:831) at org.apache.naming.NamingContext.lookup(NamingContext.java:168) at org.apache.naming.SelectorContext.lookup(SelectorContext.java:158) at javax.naming.InitialContext.lookup(Unknown Source) at com.lnt.TestServlet.doGet(TestServlet.java:19) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalin a.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(U nknown Source) `

Could you tell what is wrong in my code and why I am not able to retrieve connection object

Answer 1

Here you are not using any particular context which is common to both application. In JNDI there is seperate context for all the applications, and what objects your are binding in the first application are blow to the context of first application which are not available to any other applications initial context.

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