java.security.cert.CertPathValidatorException: algorithm check failed: MD2withRSA is disabled

严重: Servlet.service() for servlet [default] in context with path [/a] threw exception [edu.yale.its.tp.cas.client.CASAuthenticationException: Unable to validate ProxyTicketValidator [[edu.yale.its.tp.cas.client.ProxyTicketValidator proxyList=[null] [edu.yale.its.tp.cas.client.ServiceTicketValidator casValidateUrl=[https://www.jingdu.cn:8443/cas/serviceValidate] ticket=[ST-1-mdZBoqV2GRmFgVVRaeC2] service=[http%3A%2F%2Fwww.jingdu.cn%3A8088%2Fa%2Ffl_addfl.cas%3Fflid%3D5] renew=false]]]] with root cause

java.security.cert.CertPathValidatorException: algorithm check failed: MD2withRSA is disabled

这个错误是由于MD2withRSA算法引起的，该算法因其脆弱性，而在JRE 1.6.0_18之后被废弃。因此使用新版本JRE 1.6.0_22，会出现这个问题。只能安装 JRE 1.6.0_18之前的版本。