myeclipse部署时出现could not be redeployed because ……错误

myeclipse部署时出现could not be redeployed because it could not be completely removed in the undeployment phase错误。当时挺纳闷的，重启MyEclipse，重启tomcat都没有用。后来才发现在项目的build path中发现有一些jar包有问题，引进了不存在的jar包。将提示有问题的jar包remove掉之后项目恢复正常！