java.io.IOException: Server returned HTTP response code: 400 for URL: https://ucm.semyung.ac.kr/api/sso
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1627)
sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
jeus_jspwork._filter._700_UCMConnection_5fjsp._jspService(_700_UCMConnection_5fjsp.java:188)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
jeus.servlet.jsp.JspServletWrapper.executeServlet(JspServletWrapper.java:78)
jeus.servlet.filter.FilterChainImpl.internalDoFilter(FilterChainImpl.java:112)
jeus.servlet.filter.FilterChainImpl.doFilter(FilterChainImpl.java:86)
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
jeus.servlet.filter.FilterChainImpl.internalDoFilter(FilterChainImpl.java:98)
jeus.servlet.filter.FilterChainImpl.doFilter(FilterChainImpl.java:86)
com.ksign.access.filter.KASSOServiceFilter.doFilter(KASSOServiceFilter.java:110)
jeus.servlet.filter.FilterChainImpl.internalDoFilter(FilterChainImpl.java:98)
jeus.servlet.filter.FilterChainImpl.doFilter(FilterChainImpl.java:86)
filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:123)
jeus.servlet.filter.FilterChainImpl.internalDoFilter(FilterChainImpl.java:98)
jeus.servlet.filter.FilterChainImpl.doFilter(FilterChainImpl.java:86)
jeus.servlet.engine.ServletWrapper.execute(ServletWrapper.java:147)
jeus.servlet.jsp.JspServletWrapper.execute(JspServletWrapper.java:51)
jeus.servlet.engine.RequestProcessor.run(RequestProcessor.java:211)
jeus.util.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:1211)
jeus.util.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:1261)
jeus.servlet.engine.WebThreadPoolExecutor$WebRequestWorker.run(WebThreadPoolExecutor.java:340)
java.lang.Thread.run(Thread.java:745)