Clojurians Log v2

Got this anomaly once earlier today. The code the resulted in this exception was retried ~45 seconds later and succeeded. Any idea why this would happen?

{:cognitect.anomalies/category :cognitect.anomalies/fault, :cognitect.anomalies/message "Unrecognized record version (D)TLS-0.0 , plaintext connection?", :cognitect.http-client/throwable #error {
 :cause "Unrecognized record version (D)TLS-0.0 , plaintext connection?"
 :via
 [{:type <http://javax.net|javax.net>.ssl.SSLException
   :message "Unrecognized record version (D)TLS-0.0 , plaintext connection?"
   :at [sun.security.ssl.SSLEngineInputRecord bytesInCompletePacket "SSLEngineInputRecord.java" 98]}]
 :trace
 [[sun.security.ssl.SSLEngineInputRecord bytesInCompletePacket "SSLEngineInputRecord.java" 98]
  [sun.security.ssl.SSLEngineInputRecord bytesInCompletePacket "SSLEngineInputRecord.java" 64]
  [sun.security.ssl.SSLEngineImpl readRecord "SSLEngineImpl.java" 548]
  [sun.security.ssl.SSLEngineImpl unwrap "SSLEngineImpl.java" 443]
  [sun.security.ssl.SSLEngineImpl unwrap "SSLEngineImpl.java" 422]
  [<http://javax.net|javax.net>.ssl.SSLEngine unwrap "SSLEngine.java" 634]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.ssl.SslConnection unwrap "SslConnection.java" 417]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.ssl.SslConnection$DecryptedEndPoint fill "SslConnection.java" 705]
  [org.eclipse.jetty.client.http.HttpReceiverOverHTTP process "HttpReceiverOverHTTP.java" 159]
  [org.eclipse.jetty.client.http.HttpReceiverOverHTTP receive "HttpReceiverOverHTTP.java" 75]
  [org.eclipse.jetty.client.http.HttpChannelOverHTTP receive "HttpChannelOverHTTP.java" 133]
  [org.eclipse.jetty.client.http.HttpConnectionOverHTTP onFillable "HttpConnectionOverHTTP.java" 151]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.AbstractConnection$ReadCallback succeeded "AbstractConnection.java" 311]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.FillInterest fillable "FillInterest.java" 103]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.ssl.SslConnection$DecryptedEndPoint onFillable "SslConnection.java" 543]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.ssl.SslConnection onFillable "SslConnection.java" 398]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.ssl.SslConnection$2 succeeded "SslConnection.java" 161]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.FillInterest fillable "FillInterest.java" 103]
  [<http://org.eclipse.jetty.io|org.eclipse.jetty.io>.ChannelEndPoint$2 run "ChannelEndPoint.java" 117]
  [org.eclipse.jetty.util.thread.strategy.EatWhatYouKill runTask "EatWhatYouKill.java" 336]
  [org.eclipse.jetty.util.thread.strategy.EatWhatYouKill doProduce "EatWhatYouKill.java" 313]
  [org.eclipse.jetty.util.thread.strategy.EatWhatYouKill tryProduce "EatWhatYouKill.java" 171]
  [org.eclipse.jetty.util.thread.strategy.EatWhatYouKill run "EatWhatYouKill.java" 129]
  [org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread run "ReservedThreadExecutor.java" 388]
  [org.eclipse.jetty.util.thread.QueuedThreadPool runJob "QueuedThreadPool.java" 806]
  [org.eclipse.jetty.util.thread.QueuedThreadPool$Runner run "QueuedThreadPool.java" 938]