大侠门帮帮忙看看这几行日志

<2012-2-16 ????07ê±10·?48?? GMT+08:00> <Error> <HTTP> <BEA-101017> <[ServletContext@1444697628[app:ifmis module:ifmis path: spec-version:null]] Root cause of ServletException.
java.net.UnknownHostException: www.sian.com.cn
        at java.net.InetAddress.getAllByName0(InetAddress.java:1274)
        at java.net.InetAddress.getAllByName(InetAddress.java:1196)
        at java.net.InetAddress.getAllByName(InetAddress.java:1118)
        at weblogic.net.http.HttpClient.openServer(HttpClient.java:309)
        at weblogic.net.http.HttpClient.openServer(HttpClient.java:425)
        Truncated. see log file for complete stacktrace