关于用Myeclipse新建web project添加maven支持出现的问题

错误信息：
Failure to transfer org.apache.maven.plugins:maven-war-plugin:pom:2.1.1 from http://repo1.maven.org/maven2 was cached in the local repository, resolution will not be
reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-war-
plugin:pom:2.1.1 from/to central (http://repo1.maven.org/maven2): null to http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-war-plugin/2.1.1/maven-war- plugin-2.1.1.pom
错误信息来源于pom.xml的project标签，标签为：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
错误解决方法：
删除路径.m2\repository\org\apache\maven\plugins\maven-war-plugin\2.1.1（有些系统文件路径可能不同）下的后缀名为.lastUpdated文件并重新刷新文件以及更新项目配置
具体操作，在项目那里右键->refresh，项目->右键->Maven4Myeclipse->update project configuration....
以上使用Myeclipse版本10.0，Maven3.2.1，