[
https://issues.apache.org/jira/browse/TINKERPOP-2341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Florian Hockmann closed TINKERPOP-2341.
---------------------------------------
Fix Version/s: 3.4.8
3.5.0
Resolution: Fixed
> GremlinClientExtensions.SubmitAsync hangs as it tries to dispose connection
> ---------------------------------------------------------------------------
>
> Key: TINKERPOP-2341
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2341
> Project: TinkerPop
> Issue Type: Bug
> Components: dotnet
> Affects Versions: 3.4.3
> Reporter: Wilson Li
> Priority: Major
> Fix For: 3.5.0, 3.4.8
>
>
> We have been seeing occasional hangs when logging to Cosmos DB graph using
> the Gremlin.Net NuGet (version 3.4.3).
>
> Here's our code snippet:
> var results = await
> GremlinClientExtensions.SubmitAsync<dynamic>(this.Client,
> gremlinExpression).ConfigureAwait(false);
>
> foreach (var result in results)
> {
> Tracer.TraceMessage()(
> traceId,
> "Successfully logged activity result (ElapsedMilliseconds=\{0}):
> '\{1}'. Request charge is '\{2}'.",
> sw.ElapsedMilliseconds,
> JsonConvert.SerializeObject(result),
> this.GetRequestCharge(results.StatusAttributes));
> }
>
> From the dumps, it seems the connection to the DB may have hit some
> {color:#de350b}failure{color}:
> 0:000> !PrintException /d 000001c61a0fd2c8
> Exception object: 000001c61a0fd2c8
> Exception type: System.Net.WebSockets.WebSocketException
> Message: An internal WebSocket error occurred. Please see the innerException,
> if present, for more details.
> InnerException: System.IO.IOException, Use !PrintException 000001c61a0fa760
> to see more.
> StackTrace (generated):
> SP IP Function
> 000000D5B446CA20 00007FFD9263D383
> System_ni!System.Net.WebSockets.WebSocketBase.ThrowIfConvertibleException(System.String,
> System.Exception, System.Threading.CancellationToken, Boolean)+0x483
> 000000D5B446CAC0 00007FFD9203372B
> System_ni!System.Net.WebSockets.WebSocketBase+<ReceiveAsyncCore>d__45.MoveNext()+0x56b
> 000000D5B446A360 00007FFD93F7C3DF
> mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
> 000000D5B446A390 00007FFD935EDF2C
> mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
> 000000D5B446A3C0 00007FFD35D7B46C
> Gremlin_Net!Gremlin.Net.Driver.WebSocketConnection+<ReceiveMessageAsync>d__9.MoveNext()+0x20c
> 000000D5B4467CA0 00007FFD93F7C3DF
> mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
> 000000D5B4467CD0 00007FFD935EDF2C
> mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
> 000000D5B4467D00 00007FFD35D7A96F
> Gremlin_Net!Gremlin.Net.Driver.Connection+<ReceiveMessagesAsync>d__20.MoveNext()+0x16f
> 000000D3EF8FE770 00007FFD93F7C3DF
> mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
> 000000D3EF8FE7A0 00007FFD935EDF2C
> mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
> 000000D3EF8FE7D0 00007FFD35D8B1BC
> Gremlin_Net!Gremlin.Net.Driver.ProxyConnection+<SubmitAsync>d__3`1[[System.__Canon,
> mscorlib]].MoveNext()+0x15c
> 000000D3EF8FC0D0 00007FFD93F7C3DF
> mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
> 000000D3EF8FC100 00007FFD935EDF2C
> mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
> 000000D3EF8FC130 00007FFD35D8887C
> Gremlin_Net!Gremlin.Net.Driver.GremlinClient+<SubmitAsync>d__6`1[[System.__Canon,
> mscorlib]].MoveNext()+0x2ac
>
> StackTraceString: <none>
> HResult: 80004005
> 0:000> !PrintException /d 000001c61a0fa760
> Exception object: 000001c61a0fa760
> Exception type: System.IO.IOException
> Message: Unable to read data from the transport connection: An existing
> connection was forcibly closed by the remote host.
> InnerException: System.Net.Sockets.SocketException, Use !PrintException
> 000001c61a0fa570 to see more.
> StackTrace (generated):
> SP IP Function
> 000000D5B447A610 00007FFD928993C3
> System_ni!System.Net.Security._SslStream.EndRead(System.IAsyncResult)+0x7f3873
> 000000D5B447A660 00007FFD920A5B4C
> System_ni!System.Net.TlsStream.EndRead(System.IAsyncResult)+0x10c
> 000000D5B447A6B0 00007FFD94043F13
> mscorlib_ni!System.Threading.Tasks.TaskFactory`1+FromAsyncTrimPromise`1[[System.Int32,
> mscorlib],[System.__Canon, mscorlib]].Complete(System.__Canon,
> System.Func`3<System.__Canon,System.IAsyncResult,Int32>, System.IAsyncResult,
> Boolean)+0x23
> 000000D5B4475DD0 00007FFD93F7C3DF
> mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
> 000000D5B4475E00 00007FFD935EDF2C
> mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
> 000000D5B4475E30 00007FFD92035D25
> System_ni!System.Net.WebSockets.WebSocketConnectionStream+<ReadAsync>d__21.MoveNext()+0x385
> 000000D5B4471430 00007FFD93F7C3DF
> mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
> 000000D5B4471460 00007FFD935EDF2C
> mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
> 000000D5B4471490 00007FFD92034541
> System_ni!System.Net.WebSockets.WebSocketBase+WebSocketOperation+<Process>d__19.MoveNext()+0x8e1
> 000000D5B446ED40 00007FFD93F7C3DF
> mscorlib_ni!System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()+0x1f
> 000000D5B446ED70 00007FFD935EDF2C
> mscorlib_ni!System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)+0x3c
> 000000D5B446EDA0 00007FFD9203339E
> System_ni!System.Net.WebSockets.WebSocketBase+<ReceiveAsyncCore>d__45.MoveNext()+0x1de
>
> StackTraceString: <none>
> HResult: 80131620
> 0:000> !PrintException /d 000001c61a0fa570
> Exception object: 000001c61a0fa570
> {color:#de350b}Exception type: System.Net.Sockets.SocketException{color}
> {color:#de350b}Message: An existing connection was forcibly closed by the
> remote host{color}
> InnerException: <none>
> StackTrace (generated):
> SP IP Function
> 000000D5B447ED00 00007FFD928975F7
> System_ni!System.Net.Sockets.Socket.EndReceive(System.IAsyncResult)+0x7fe207
> 000000D5B447ED40 00007FFD9209924D
> System_ni!System.Net.Sockets.NetworkStream.EndRead(System.IAsyncResult)+0x2d
>
>
> But then the Gremlin.Net 's exception handling to {color:#ff8b00}dispose and
> close{color} connections seemed to hit some deadlock:
> 0:000> ~26e !clrstack
> OS Thread Id: 0x31b8 (26)
> Child SP IP Call Site
> 000000d3ef8f8798 +00007ffda80b6594+ [GCFrame: 000000d3ef8f8798]
> 000000d3ef8f8868 +00007ffda80b6594+ [HelperMethodFrame_1OBJ:
> 000000d3ef8f8868] System.Threading.Monitor.ObjWait(Boolean, Int32,
> System.Object)
> 000000d3ef8f8980 +00007ffd935f6a0f+
> System.Threading.ManualResetEventSlim.Wait(Int32,
> System.Threading.CancellationToken)
> [f:\dd\ndp\clr\src\BCL\system\threading\ManualResetEventSlim.cs @ 669]
> 000000d3ef8f8a10 +00007ffd935ef815+
> System.Threading.Tasks.Task.SpinThenBlockingWait(Int32,
> System.Threading.CancellationToken)
> [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 3320]
> 000000d3ef8f8a80 +00007ffd93f60a88+
> System.Threading.Tasks.Task.InternalWait(Int32,
> System.Threading.CancellationToken)
> [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 3259]
> 000000d3ef8f8b50 +00007ffd935eef08+ System.Threading.Tasks.Task.Wait(Int32,
> System.Threading.CancellationToken)
> [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 3167]
> {color:#ff8b00}000000d3ef8f8b80 +00007ffd35d53f7f+
> Gremlin.Net.Process.Utils.WaitUnwrap(System.Threading.Tasks.Task){color}
> {color:#ff8b00}000000d3ef8f8bc0 +00007ffd35db01dc+
> Gremlin.Net.Driver.ConnectionPool.ReturnConnectionIfOpen(Gremlin.Net.Driver.Connection){color}
> 000000d3ef8f8bf0 +00007ffd35d88937+
> Gremlin.Net.Driver.GremlinClient+d__6`1[[System.__Canon, mscorlib]].MoveNext()
> 000000d3ef8fbfe8 +00007ffd94756f21+ [HelperMethodFrame: 000000d3ef8fbfe8]
> 000000d3ef8fc0d0 +00007ffd93f7c3df+
> System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> [f:\dd\ndp\clr\src\BCL\system\runtime\exceptionservices\exceptionservicescommon.cs
> @ 133]
> 000000d3ef8fc100 +00007ffd935edf2c+
> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
> [f:\dd\ndp\clr\src\BCL\system\runtime\compilerservices\TaskAwaiter.cs @ 156]
> 000000d3ef8fc130 +00007ffd35d8887c+
> Gremlin.Net.Driver.GremlinClient+d__6`1[[System.__Canon, mscorlib]].MoveNext()
> 000000d3ef8fc1e0 +00007ffd935a5ab3+
> System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext,
> System.Threading.ContextCallback, System.Object, Boolean)
> [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 954]
> 000000d3ef8fc2b0 +00007ffd935a5944+
> System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext,
> System.Threading.ContextCallback, System.Object, Boolean)
> [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 902]
> 000000d3ef8fc2e0 +00007ffd935f12bc+
> System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run()
> [f:\dd\ndp\clr\src\BCL\system\runtime\compilerservices\AsyncMethodBuilder.cs
> @ 1070]
> 000000d3ef8fc330 +00007ffd935f80b2+
> System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action,
> Boolean, System.Threading.Tasks.Task ByRef)
> [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\TaskContinuation.cs @ 810]
> 000000d3ef8fc380 +00007ffd93573dc7+
> System.Threading.Tasks.Task.FinishContinuations()
> [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 3617]
> 000000d3ef8fc410 +00007ffd935ee890+
> System.Threading.Tasks.Task.Finish(Boolean)
> [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2263]
> 000000d3ef8fc470 +00007ffd935f0101+
> System.Threading.Tasks.Task`1[[System.__Canon,
> mscorlib]].TrySetException(System.Object)
> [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Future.cs @ 606]
> 000000d3ef8fc4c0 +00007ffd935f06a8+
> System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1[[System.__Canon,
> mscorlib]].SetException(System.Exception)
> 000000d3ef8fc500 +00007ffd35d8b27d+
> Gremlin.Net.Driver.ProxyConnection+d__3`1[[System.__Canon,
> mscorlib]].MoveNext()
> 000000d3ef8fe688 +00007ffd94756f21+ [HelperMethodFrame: 000000d3ef8fe688]
> 000000d3ef8fe770 +00007ffd93f7c3df+
> System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
> [f:\dd\ndp\clr\src\BCL\system\runtime\exceptionservices\exceptionservicescommon.cs
> @ 133]
> 000000d3ef8fe7a0 +00007ffd935edf2c+
> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
> [f:\dd\ndp\clr\src\BCL\system\runtime\compilerservices\TaskAwaiter.cs @ 156]
> 000000d3ef8fe7d0 +00007ffd35d8b1bc+
> Gremlin.Net.Driver.ProxyConnection+d__3`1[[System.__Canon,
> mscorlib]].MoveNext()
> 000000d3ef8fe860 +00007ffd935a5ab3+
> System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext,
> System.Threading.ContextCallback, System.Object, Boolean)
> [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 954]
> 000000d3ef8fe930 +00007ffd935a5944+
> System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext,
> System.Threading.ContextCallback, System.Object, Boolean)
> [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 902]
> 000000d3ef8fe960 +00007ffd935f12bc+
> System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run()
> [f:\dd\ndp\clr\src\BCL\system\runtime\compilerservices\AsyncMethodBuilder.cs
> @ 1070]
> 000000d3ef8fe9b0 +00007ffd935e4e22+
> System.Threading.ThreadPoolWorkQueue.Dispatch()
> [f:\dd\ndp\clr\src\BCL\system\threading\threadpool.cs @ 820]
> 000000d3ef8fee48 +00007ffd94646a93+ [DebuggerU2MCatchHandlerFrame:
> 000000d3ef8fee48]
>
> Looks like Gremlin.Net handles a dead connection by attempting to forcing a
> closure of the connection pool. This path calls Task.Wait() instead of using
> await Task, so it is very possible that this is the cause of the hang.
>
> Might be related to this issue:
> [https://issues.apache.org/jira/projects/TINKERPOP/issues/TINKERPOP-2268?filter=allopenissues&orderby=affectedVersion+DESC%2C+priority+DESC%2C+updated+DESC]
>
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