java.net.UnknownHostException: DNS host lookup failed for URL: http://free-1234f56bff7-1273763c43e-12a5545b384.force.com/se/%E6%9D%B1%E4%BA%AC%E3%83%A2%E3%83%8E%E3%83%AC%E3%83%BC%E3%83%AB%E5%A4%A9%E7%A9%BA%E6%A9%8B%EF%BC%8B%E5%9C%9F%E5%9C%B0/st?remoteaddr=107.21.169.9 java.net.UnknownHostException: DNS host lookup failed for URL: http://free-1234f56bff7-1273763c43e-12a5545b384.force.com/se/%E6%9D%B1%E4%BA%AC%E3%83%A2%E3%83%8E%E3%83%AC%E3%83%BC%E3%83%AB%E5%A4%A9%E7%A9%BA%E6%A9%8B%EF%BC%8B%E5%9C%9F%E5%9C%B0/st?remoteaddr=107.21.169.9DNS host lookup failed for URL: http://free-1234f56bff7-1273763c43e-12a5545b384.force.com/se/%E6%9D%B1%E4%BA%AC%E3%83%A2%E3%83%8E%E3%83%AC%E3%83%BC%E3%83%AB%E5%A4%A9%E7%A9%BA%E6%A9%8B%EF%BC%8B%E5%9C%9F%E5%9C%B0/st?remoteaddr=107.21.169.9 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$Connection.getResponseCode(URLFetchServiceStreamHandler.java:303) sweetie.server.Relay2.doGet(Relay2.java:131) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) org.seasar.framework.container.filter.S2ContainerFilter.doFilter(S2ContainerFilter.java:60) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:37) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:256) org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) org.mortbay.jetty.Server.handle(Server.java:326) org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146) com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchServletRequest(JavaRuntime.java:699) com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchRequest(JavaRuntime.java:661) com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:631) com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:453) com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:460) io.grpc.Context.run(Context.java:565) com.google.tracing.CurrentContext.runInContext(CurrentContext.java:166) com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:319) com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:311) com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:457) com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:273) java.lang.Thread.run(Thread.java:745)