现象：在eclipse中启动tomcat总是提示“Server Tomcat v5.5 Server @ localhost was unable to start within 45 seconds. If the server requires more time, try increasing the timeout in the server editor.
修改 workspace\.metadata\.plugins\org.eclipse.wst.server.core\servers.xml文件。
<servers>
<server hostname="localhost" id="JBoss v5.0 at localhost" name="JBoss v5.0 at
localhost" runtime-id="JBoss v5.0" server-type="org.eclipse.jst.server.generic.jboss5"
server-type-id="org.eclipse.jst.server.generic.jboss5" start-timeout="1000" stop-
timeout="15" timestamp="0">
<map jndiPort="1099" key="generic_server_instance_properties" port="8090"
serverAddress="127.0.0.1" serverConfig="default"/>
</server>
</servers>
把 其中的start-timeout="45" 改为 start-timeout="100" 或者更长，根据不同同学的工程大小来设置。最后重启eclipse就可以了。
原文：http://www.cnblogs.com/suncj/p/4075542.html