c# - Execution of operation of a sharepoint service -

i have sharepoint timer job runs every day @ night, calls operation of sharepoint service starts execution after 30 minutes execution of operation ends unexpectedly , returns following error service:

mensaje:an error occurred while receiving http response https://mysite/myservice.svc due service endpoint binding not using http protocol. due http request context being aborted server (possibly due service shutting down). see server logs more details.innerexception:system.net.webexception: underlying connection closed: unexpected error occurred on receive. ---> system.io.ioexception: unable read data transport connection: existing connection forcibly closed remote host. ---> system.net.sockets.socketexception: existing connection forcibly closed remote host    @ system.net.sockets.networkstream.read(byte[] buffer, int32 offset, int32 size)    --- end of inner exception stack trace ---    @ system.net.sockets.networkstream.read(byte[] buffer, int32 offset, int32 size)    @ system.net.fixedsizereader.readpacket(byte[] buffer, int32 offset, int32 count)    @ system.net.security._sslstream.startframeheader(byte[] buffer, int32 offset, int32 count, asyncprotocolrequest asyncrequest)    @ system.net.security._sslstream.startreading(byte[] buffer, int32 offset, int32 count, asyncprotocolrequest asyncrequest)    @ system.net.security._sslstream.processread(byte[] buffer, int32 offset, int32 count, asyncprotocolrequest asyncrequest)    @ system.net.tlsstream.read(byte[] buffer, int32 offset, int32 size)    @ system.net.pooledstream.read(byte[] buffer, int32 offset, int32 size)    @ system.net.connection.syncread(httpwebrequest request, boolean userretrievedstream, boolean proberead)    --- end of inner exception stack trace ---    @ system.net.httpwebrequest.getresponse()    @ system.servicemodel.channels.httpchannelfactory.httprequestchannel.httpchannel    request.waitforreply(timespan timeout) 

the creation of service established follows:

 public static timerjobs.svcverificaciones.verificacionesclient obtenerclienteverificacion()         {             estableceratributosconexion("/_layouts/myservice.svc ");             timerjobs.svcverificaciones.verificacionesclient svcverificaciones = new timerjobs.svcverificaciones.verificacionesclient(_binding, _address);             svcverificaciones.clientcredentials.windows.allowedimpersonationlevel = _tokenimpersonationlevel;             svcverificaciones.channelfactory.credentials.windows.clientcredential = _defaultnetworkcredentials;             return svcverificaciones;         }   private static void estableceratributosconexion(string dirservicio)         {             _binding = new basichttpbinding();              if (_context.web.url.tostring().tolower().contains("https"))             {                 _binding.security.mode = basichttpsecuritymode.transport;             }                 else                 {                     _binding.security.mode = basichttpsecuritymode.transportcredentialonly;                 }                  _binding.maxbufferpoolsize = 2147483647;                 _binding.maxbuffersize = 2147483647;                 _binding.maxreceivedmessagesize = 2147483647;                  _binding.readerquotas.maxarraylength = 2147483647;                 _binding.readerquotas.maxstringcontentlength = 2147483647;                 _binding.readerquotas.maxbytesperread = 2147483647;                 _binding.readerquotas.maxnametablecharcount = 2147483647;                 _binding.readerquotas.maxdepth = 32;                  _binding.closetimeout = new timespan(4, 30, 0);                 _binding.opentimeout = new timespan(4, 30, 0);                 _binding.receivetimeout = new timespan(4, 30, 0);                 _binding.sendtimeout = new timespan(4, 30, 0);                   _binding.security.transport.clientcredentialtype = httpclientcredentialtype.ntlm;                 _address = new endpointaddress(_context.web.url + dirservicio);    _tokenimpersonationlevel = system.security.principal.tokenimpersonationlevel.impersonation;             _defaultnetworkcredentials = system.net.credentialcache.defaultnetworkcredentials;          } 

the call service made follows

 private void ejecutarprocesoauditoriaquinquenal()     {         try         {             using (spsite _site = new spsite(siteid))             {                 using (spweb _web = _site.openweb(webid))                 {                     _web.allowunsafeupdates = true;                     fservicios.context = spcontext.getcontext(_web);                     using (var svcverificaciones = fservicios.obtenerclienteverificacion())                     {                        bool completado = svcverificaciones.construirrequerimientopadre(true);                         if (completado)                         {                             traza(system.reflection.methodbase.getcurrentmethod().name, "termina construccion de los requerimientos hijos exitoso");                         }                         else                         {                             traza(system.reflection.methodbase.getcurrentmethod().name, "termina construccion de los requerimientos hijos con errores");                         }                      }                 }             }         }         catch (exception ex)         {             traza(system.reflection.methodbase.getcurrentmethod().name, "mensaje:" + ex.message + "innerexception:" + ex.innerexception);         }     }