java.net.UnknownHostException: DNS host lookup failed for URL: http://free-1234f56bff7-1273763c43e-12a5545b384.force.com/se/%E6%A8%AA%E6%B5%9C%E7%B7%9A%EF%BC%8B%E5%9C%9F%E5%9C%B0%EF%BC%8B%E3%82%B3%E3%83%BC%E3%82%B9%EF%BC%8B_/xln?remoteaddr=3.80.60.248
java.net.UnknownHostException: DNS host lookup failed for URL: http://free-1234f56bff7-1273763c43e-12a5545b384.force.com/se/%E6%A8%AA%E6%B5%9C%E7%B7%9A%EF%BC%8B%E5%9C%9F%E5%9C%B0%EF%BC%8B%E3%82%B3%E3%83%BC%E3%82%B9%EF%BC%8B_/xln?remoteaddr=3.80.60.248DNS host lookup failed for URL: http://free-1234f56bff7-1273763c43e-12a5545b384.force.com/se/%E6%A8%AA%E6%B5%9C%E7%B7%9A%EF%BC%8B%E5%9C%9F%E5%9C%B0%EF%BC%8B%E3%82%B3%E3%83%BC%E3%82%B9%EF%BC%8B_/xln?remoteaddr=3.80.60.248
com.google.appengine.api.urlfetch.URLFetchServiceImpl.convertApplicationException(URLFetchServiceImpl.java:171)
com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:45)
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.fetchResponse(URLFetchServiceStreamHandler.java:571)
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.getInputStream(URLFetchServiceStreamHandler.java:450)
com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.getResponseCode(URLFetchServiceStreamHandler.java:303)
sweetie.server.Relay2.doGet(Relay2.java:131)
javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:848)
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1772)
org.seasar.framework.container.filter.S2ContainerFilter.doFilter(S2ContainerFilter.java:60)
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60)
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
com.google.apphosting.runtime.jetty9.ParseBlobUploadHandler.handle(ParseBlobUploadHandler.java:119)
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1182)
com.google.apphosting.runtime.jetty9.AppEngineWebAppContext.doHandle(AppEngineWebAppContext.java:183)
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
com.google.apphosting.runtime.jetty9.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:296)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
org.eclipse.jetty.server.Server.handle(Server.java:539)
org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:333)
com.google.apphosting.runtime.jetty9.RpcConnection.handle(RpcConnection.java:202)
com.google.apphosting.runtime.jetty9.RpcConnector.serviceRequest(RpcConnector.java:81)
com.google.apphosting.runtime.jetty9.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123)
com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchServletRequest(JavaRuntime.java:695)
com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchRequest(JavaRuntime.java:658)
com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:628)
com.google.apphosting.runtime.JavaRuntime$NullSandboxRequestRunnable.run(JavaRuntime.java:820)
com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:269)
java.lang.Thread.run(Thread.java:748)