今天給客戶進行系統升級，就是很平常性的升級，沒有什麼多大的改變，升級後啓動tomcat就一直不正常了，總是報了一個錯誤：錯誤信息如下：
嚴重: The web application [] registered the JDBC driver [com.microsoft.sqlserver
.jdbc.SQLServerDriver] but failed to unregister it when the web application was
stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
.jdbc.SQLServerDriver] but failed to unregister it when the web application was
stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
出現問題後，換了個新的tomcat來跑一樣跑舊的項目一樣是跑不了，總是報這個錯，系統無法正常訪問！求各位大俠幫忙看下，謝謝咯！
