twitter4j getOAuthRequestToken error - api

Question

Troubleshooting thank you
I'm not sure why not.
maybe https problem.
ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setDebugEnabled(true).setOAuthConsumerKey("***************************")
.setOAuthConsumerSecret("***************************");
TwitterFactory tf = new TwitterFactory(cb.build());
Twitter twitter = tf.getInstance();
request.getSession().setAttribute("twitter",twitter);
g_reqToken = twitter.getOAuthRequestToken(); `<------------------error line`
authUrl = g_reqToken.getAuthorizationURL();
request.getSession().setAttribute("userToken",g_reqToken.getToken());
request.getSession().setAttribute("userSecretToken",g_reqToken.getTokenSecret());
DEBUG [http-bio-80-exec-6] (AbstractHandlerExceptionResolver.java:132)- Resolving exception from handler [web.controller.snsTest#33a5d1ee]: api.twitter.com
Relevant discussions can be found on the Internet at:
http:/ /www.google.co.jp/search?q=3cc69290 or
http:/ /www.google.co.jp/search?q=161493db
TwitterException{exceptionCode=[3cc69290-161493db 3cc69290-161493b1], statusCode=-1, message=null, code=-1, retryAfter=-1, rateLimitStatus=null, version=4.0.2}
DEBUG [http-bio-80-exec-6] (AbstractHandlerExceptionResolver.java:132)- Resolving exception from handler [web.controller.snsTest#33a5d1ee]: api.twitter.com
Relevant discussions can be found on the Internet at:
http:/ /www.google.co.jp/search?q=3cc69290 or
http:/ /www.google.co.jp/search?q=161493db
TwitterException{exceptionCode=[3cc69290-161493db 3cc69290-161493b1], statusCode=-1, message=null, code=-1, retryAfter=-1, rateLimitStatus=null, version=4.0.2}
DEBUG [http-bio-80-exec-6] (AbstractHandlerExceptionResolver.java:132)- Resolving exception from handler [web.controller.snsTest#33a5d1ee]: api.twitter.com
Relevant discussions can be found on the Internet at:
http://www.google.co.jp/search?q=3cc69290 or
http://www.google.co.jp/search?q=161493db
TwitterException{exceptionCode=[3cc69290-161493db 3cc69290-161493b1], statusCode=-1, message=null, code=-1, retryAfter=-1, rateLimitStatus=null, version=4.0.2}
DEBUG [http-bio-80-exec-6] (FrameworkServlet.java:959)- Could not complete request
api.twitter.com
Relevant discussions can be found on the Internet at:
http:/ /www.google.co.jp/search?q=3cc69290 or
http:/ /www.google.co.jp/search?q=161493db
TwitterException{exceptionCode=[3cc69290-161493db 3cc69290-161493b1], statusCode=-1, message=null, code=-1, retryAfter=-1, rateLimitStatus=null, version=4.0.2}
at twitter4j.HttpClientImpl.handleRequest(HttpClientImpl.java:178)
at twitter4j.HttpClientBase.request(HttpClientBase.java:53)
at twitter4j.HttpClientBase.post(HttpClientBase.java:82)
at twitter4j.auth.OAuthAuthorization.getOAuthRequestToken(OAuthAuthorization.java:107)
at twitter4j.auth.OAuthAuthorization.getOAuthRequestToken(OAuthAuthorization.java:92)
at twitter4j.TwitterBaseImpl.getOAuthRequestToken(TwitterBaseImpl.java:263)
at twitter4j.TwitterBaseImpl.getOAuthRequestToken(TwitterBaseImpl.java:258)
at web.controller.snsTest.twitter(snsTest.java:96)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at cms.common.SimpleCORSFilter.doFilter(SimpleCORSFilter.java:19)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.logging.log4j.core.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:66)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.UnknownHostException: api.twitter.com
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:618)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.protocol.https.HttpsClient.(HttpsClient.java:275)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:371)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:932)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1091)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)
at twitter4j.HttpClientImpl.handleRequest(HttpClientImpl.java:136)
... 51 more

Answer 1

I have experienced the same error, but as soon as i switched to wifi, everything worked as expected...i had different problems of this kind with twitter4j when network connection was week.