Merge pull request #1331 from byin-lessen/update/membase-graph-db

set internal server error as retryable status code

Author: iceljc

src/Plugins/BotSharp.Plugin.Membase/GraphDb/MembaseGraphDb.cs

@@ -1,3 +1,4 @@
+using System.Net;
 using Polly;
 using Polly.Timeout;
 using Refit;
@@ -75,7 +76,7 @@ private AsyncPolicy BuildRetryPolicy()
             .Handle<HttpRequestException>()
             .Or<TaskCanceledException>()
             .Or<TimeoutRejectedException>()
-            .Or<ApiException>(ex => ex.StatusCode == HttpStatusCode.ServiceUnavailable)
+            .Or<ApiException>(ex => ex.StatusCode == HttpStatusCode.ServiceUnavailable || ex.StatusCode == HttpStatusCode.InternalServerError)
             .WaitAndRetryAsync(
                 retryCount: RetryCount,
                 sleepDurationProvider: retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)),