Why To Get Build Failed When Running Program On Netbeans

I am trying to run my program through netbeans and I get a message: build-impl.xml:1048 the module has not been deployed. see the server log for details.The corresponding line in the xml document is:

<nbdeploy clientUrlPart="${client.urlPart}" debugmode="false" forceRedeploy="${forceRedeploy}"/>

And in the server log there is a long list of comments, the first which looks to be of significance to this issue is:

WARNING [http-apr-8080-exec-57] org.apache.catalina.deploy.NamingResourcesImpl.cleanUp Failed to retrieve JNDI naming context for container [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/transBoard]] so no cleanup was performed for that container
javax.naming.NameNotFoundException: Name [comp/env] is not bound in this Context. Unable to find [comp].

There are others further down the list which might also be significant such as:

SEVERE [http-apr-8080-exec-59] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/transBoard]]

The corresponding line of code for the first warning that I listed is for the DataSource object and I wrote it as follows:

dataSource = (DataSource)
ic.lookup("java:/comp/env/jdbc/trans_board");

the issue has something to do with connecting to the database since it ran fine before I added the database related code.

update: my server.xml file is as follows:

<?xml version='1.0' encoding='utf-8'?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership.The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

[code]....