感谢您的帮助:) 实际上，一旦我从eclipse中删除了所有服务器并将其关闭，就可以解决此问题.然后，我再次读取了服务器，它开始工作.仍然无法找到导致此错误的原因，但已使用上述方法解决了该问题.

Thank You for your help :) Actually, this problem was solved once I removed all the server from eclipse and switched it off. Then I readded the sever once again and it started working. Still not able to find the reason this error was caused but it was fixed by using the above method.