HTTP Status 500 – Internal Server Error


Type Exception Report

Message ir.lib.au.edu.tw

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

java.net.UnknownHostException: ir.lib.au.edu.tw
	java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
	java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	java.net.Socket.connect(Socket.java:607)
	org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:123)
	org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:123)
	org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:147)
	org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:101)
	org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:381)
	org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:641)
	org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:576)
	org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:554)
	org.apache.portals.applications.webcontent.proxy.impl.RewritableHttpReverseProxyServiceImpl.invoke(RewritableHttpReverseProxyServiceImpl.java:445)
	org.apache.portals.applications.webcontent.proxy.impl.DefaultHttpReverseProxyServlet.service(DefaultHttpReverseProxyServlet.java:463)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/8.5.54