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https://issues.apache.org/jira/browse/TINKERPOP-2541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17309418#comment-17309418
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Florian Hockmann commented on TINKERPOP-2541:
---------------------------------------------
I think the status code 101 is used to indicate that the connection is upgraded
from plain HTTP to WebSockets which makes sense as this error occurs when the
connection is established.
The status code 500 however hints at a problem on the server side and I have no
idea what that problem could be here with CosmosDB. I agree that we need some
information from the server here as all that we can see is that there is _some_
problem with the server.
> .NET SDK (CosmosDb): The server returned status code '500' when status code
> '101' was expected.
> -----------------------------------------------------------------------------------------------
>
> Key: TINKERPOP-2541
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2541
> Project: TinkerPop
> Issue Type: Bug
> Components: dotnet
> Affects Versions: 3.4.10
> Reporter: Kirk Marple
> Priority: Major
>
> Using 3.4.10, .NET SDK, I've been getting a lot of problems talking to
> CosmosDb lately.
> Some hangs on SubmitAsync (after several successful calls), and sometimes
> errors just creating the GremlinClient.
> Seems to have cropped more over the last month, where I can reproduce it more
> often now. I've tried playing with pool size, etc. and haven't been able to
> get around it.
> I'm able to repro it just from my laptop locally when running integration
> tests against CosmosDb.
> Any thoughts on this? It's preventing us going into production with our
> application.
>
> {code:java}
> The server returned status code '500' when status code '101' was expected.
> at System.Net.WebSockets.WebSocketHandle.<ConnectAsync>d__13.MoveNext()
> at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
> at
> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
> task)
> at Gremlin.Net.Driver.WebSocketConnection.<ConnectAsync>d__4.MoveNext()
> at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
> at
> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
> task)
> at Gremlin.Net.Driver.Connection.<ConnectAsync>d__15.MoveNext()
> at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
> at
> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
> task)
> at
> Gremlin.Net.Driver.ConnectionPool.<CreateNewConnectionAsync>d__18.MoveNext()
> at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
> at
> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
> task)
> at Gremlin.Net.Driver.ConnectionPool.<FillPoolAsync>d__17.MoveNext()
> at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
> at
> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
> task)
> at
> Gremlin.Net.Driver.ConnectionPool.<ReplaceDeadConnectionsAsync>d__15.MoveNext()
> at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> at Gremlin.Net.Process.Utils.WaitUnwrap(Task task)
> at Gremlin.Net.Driver.ConnectionPool..ctor(IConnectionFactory
> connectionFactory, ConnectionPoolSettings settings)
> at Gremlin.Net.Driver.GremlinClient..ctor(GremlinServer gremlinServer,
> GraphSONReader graphSONReader, GraphSONWriter graphSONWriter, String
> mimeType, ConnectionPoolSettings connectionPoolSettings, Action`1
> webSocketConfiguration, String sessionId)
> at
> Unstruk.Frameworks.Data.Graphs.GraphHelpers.<>c_DisplayClass4_0.<CreateGremlinClient>b_3()
> in D:\a\1\s\src\Unstruk.Frameworks.Data\GraphHelpers.cs:line 90
> at Polly.Policy.<>c_DisplayClass126_0`1.<ExecuteAndCapture>b_0(Context ctx,
> CancellationToken ct)
> at Polly.Retry.RetryEngine.Implementation[TResult](Func`3 action, Context
> context, CancellationToken cancellationToken, ExceptionPredicates
> shouldRetryExceptionPredicates, ResultPredicates`1
> shouldRetryResultPredicates, Action`4 onRetry, Int32 permittedRetryCount,
> IEnumerable`1 sleepDurationsEnumerable, Func`4 sleepDurationProvider)
> at Polly.Retry.RetryPolicy.Implementation[TResult](Func`3 action, Context
> context, CancellationToken cancellationToken)
> at Polly.Policy.Execute[TResult](Func`3 action, Context context,
> CancellationToken cancellationToken)
> at Polly.Policy.ExecuteAndCapture[TResult](Func`3 action, Context context,
> CancellationToken cancellationToken)
> {code}
> Here's my helper method for creating the client, which I wrapped with Polly
> retry, and it still failed.
> {code:java}
> private const int DEFAULT_POOL_SIZE = 8;
> private const int DEFAULT_INPROCESS_PER_CONNECTION = 32;
> public static GremlinClient CreateGremlinClient(ILogger logger,
> GraphSettings settings, string collectionName)
> {
> const int DEFAULT_RETRY_COUNT = 5;
> const float RETRY_SEED = 1.5F;
> if (String.IsNullOrEmpty(settings.Location))
> throw new InvalidOperationException("Invalid CosmosDB graph
> server name.");
> if (String.IsNullOrEmpty(settings.Key))
> throw new InvalidOperationException("Invalid CosmosDB graph
> access key.");
> if (String.IsNullOrEmpty(settings.DatabaseId))
> throw new InvalidOperationException("Invalid CosmosDB graph
> database id.");
> if (String.IsNullOrEmpty(collectionName))
> throw new InvalidOperationException("Invalid CosmosDB graph
> collection name.");
> var sw = Stopwatch.StartNew();
> var uri = new Uri(settings.Location);
> uri = ConvertGremlinEndpoint(uri);
> var server = new GremlinServer(uri.Host, 443, true,
> $"/dbs/{settings.DatabaseId}/colls/{collectionName}", settings.Key);
> var connectionPoolSettings = new ConnectionPoolSettings
> {
> PoolSize = DEFAULT_POOL_SIZE,
> MaxInProcessPerConnection = DEFAULT_INPROCESS_PER_CONNECTION
> };
> var webSocketConfiguration = new
> Action<ClientWebSocketOptions>(options =>
> {
> //options.KeepAliveInterval = TimeSpan.FromSeconds(10);
> });
> int attempt = 1;
> var result = Policy
> .Handle<ResponseException>()
> .WaitAndRetry(DEFAULT_RETRY_COUNT,
> retryAttempt => TimeSpan.FromSeconds(Math.Pow(RETRY_SEED,
> retryAttempt)),
> onRetry: (e, delay) =>
> {
> #if DEBUG_SERVICE_GRAPH
> logger.LogWarning($"Failed to create Gremlin client,
> attempt [{attempt}]. Trying again in [{delay}]. {e.Message}");
> #endif
> attempt++;
> })
> .ExecuteAndCapture(() =>
> {
> return new GremlinClient(server, new GraphSON2Reader(),
> new GraphSON2Writer(), GremlinClient.GraphSON2MimeType,
> connectionPoolSettings, webSocketConfiguration);
> });
> if (result.Outcome == OutcomeType.Failure)
> throw new InvalidOperationException($"Failed to create
> Gremlin Client.", result.FinalException);
> logger.LogDebug($"Created Gremlin client, location
> [{settings.Location}], database [{settings.DatabaseId}], collection
> [{collectionName}], took [{sw.Elapsed}].");
> return result.Result;
> }
> {code}
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