An internal error occurred during: "Updating status for Tomcat v7.0 Server at localhost..."

tomcat啓動maven工程的時候提示如下錯誤信息： An internal error occurred during: "Updating status for Tomcat v7.0 Server at localhost..." java.lang.NullPointerException 因爲maven的包中有依賴api,core 等包，需要將該project添加進來即可  

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