Connection timed out:

Question

java.net.ConnectException: Connection timed out: connect
java.net.PlainSocketImpl.socketConnect(Native Method)
java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
java.net.Socket.connect(Socket.java:529)
java.net.Socket.connect(Socket.java:478)
sun.net.NetworkClient.doConnect(NetworkClient.java:163)
sun.net.www.http.HttpClient.openServer(HttpClient.java:411)
sun.net.www.http.HttpClient.openServer(HttpClient.java:525)
sun.net.www.http.HttpClient.(HttpClient.java:208)
sun.net.www.http.HttpClient.New(HttpClient.java:291)
sun.net.www.http.HttpClient.New(HttpClient.java:310)
sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:987)
sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:923)
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:841)
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195)
edu.yale.its.tp.cas.util.SecureURL.retrieve(SecureURL.java:70)
edu.yale.its.tp.cas.client.ServiceTicketValidator.validate(ServiceTicketValidator.java:210)
edu.yale.its.tp.cas.client.filter.CASFilter.getAuthenticatedUser(CASFilter.java:159)
edu.yale.its.tp.cas.client.filter.CASFilter.doFilter(CASFilter.java:133)
net.sf.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:303)
net.sf.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:173)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
使用单点登入的时候遇到这种问题，登入跳不到页面，总连接超时。。。不知道为什么 哪位大神能帮帮我吗

Answer 1

org.apache.tomcat.dbcp.dbcp.SQLNestedException: java.net.ConnectException: Connection timed out: connect登陆服务器后 连接本机的数据库  怎么定义root.xml都有错误 都不能连接困扰好久 原来是本机防火墙的原因晕死了！ ......
答案就在这里：mysql Connection timed out
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