CAS错误之context[]startup failed due to previous errors

CAS异常之context[]startup failed due to previous errors
localhost.log中报错的错误：
java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory

原因：
缺少jar:commons-logging-1.1.jar

解决办法：
将commons-logging-1.1.jar拷贝到tomcat的lib目录下，重启tomcat，即可。