exception when connect to server

when connect to web service thows this exception :

' FATAL EXCEPTION: AsyncServer , PID: 3343 java.lang.AssertionError at com.koushikdutta.async.AsyncSSLSocketWrapper.write(AsyncSSLSocketWrapper.java:390) at com.koushikdutta.async.AsyncSSLSocketWrapper.handleHandshakeStatus(AsyncSSLSocketWrapper.java:276) at com.koushikdutta.async.AsyncSSLSocketWrapper.handshake(AsyncSSLSocketWrapper.java:114) at com.koushikdutta.async.http.AsyncSSLSocketMiddleware.tryHandshake(AsyncSSLSocketMiddleware.java:89) at com.koushikdutta.async.http.AsyncSSLSocketMiddleware$2.onConnectCompleted(AsyncSSLSocketMiddleware.java:106) at com.koushikdutta.async.AsyncServer.runLoop(AsyncServer.java:849) at com.koushikdutta.async.AsyncServer.run(AsyncServer.java:658) at com.koushikdutta.async.AsyncServer.access$800(AsyncServer.java:44) at com.koushikdutta.async.AsyncServer$14.run(AsyncServer.java:600) '