2018-10-26 16:31:28,675 [10] ERROR Helpmebot.Repositories.ShortUrlCacheRepository [(null)] - Transactional function failed
System.Net.WebException: The remote server returned an error: (503) Service Unavailable.
  at System.Net.HttpWebRequest.GetResponseFromData (System.Net.WebResponseStream stream, System.Threading.CancellationToken cancellationToken) [0x00146] in <9b672a45b19f4d52b5f28f32c0c91d97>:0 
  at System.Net.HttpWebRequest.RunWithTimeoutWorker[T] (System.Threading.Tasks.Task`1[TResult] workerTask, System.Int32 timeout, System.Action abort, System.Func`1[TResult] aborted, System.Threading.CancellationTokenSource cts) [0x000f8] in <9b672a45b19f4d52b5f28f32c0c91d97>:0 
  at System.Net.HttpWebRequest.GetResponse () [0x00016] in <9b672a45b19f4d52b5f28f32c0c91d97>:0 
  at Helpmebot.Services.UrlShortening.HmbUrlShorteningService.GetShortUrl (System.String longUrl) [0x0003d] in <5472ade6f834424e8e51ff400c17460d>:0 
  at Helpmebot.Repositories.ShortUrlCacheRepository+<>c__DisplayClass1_0.<GetShortUrl>b__0 (NHibernate.ISession session) [0x00071] in <5472ade6f834424e8e51ff400c17460d>:0 
  at Helpmebot.Repositories.RepositoryBase`1[T].Transactionally (System.Action`1[T] callback, System.Data.IsolationLevel level) [0x00032] in <5472ade6f834424e8e51ff400c17460d>:0