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Type:
Task
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: 2.7.0
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Component/s: Connectivity, Read Operations
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Labels:
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Environment:windows, console application, .net framework 4.7.2
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(copied to CRM)
We are running simultaneously approx. 15-16 instances of a tool (we wrote), which sometimes are throwing the following error messages by a read operation:
2019-03-13 00:02:59 An exception occurred while receiving a message from the server. MongoDB.Driver.Core ReceiveBuffer at MongoDB.Driver.Core.Connections.BinaryConnection.ReceiveBuffer() at MongoDB.Driver.Core.Connections.BinaryConnection.ReceiveBuffer(Int32 responseTo, CancellationToken cancellationToken) at MongoDB.Driver.Core.Connections.BinaryConnection.ReceiveMessage(Int32 responseTo, IMessageEncoderSelector encoderSelector, MessageEncoderSettings messageEncoderSettings, CancellationToken cancellationToken) at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.AcquiredConnection.ReceiveMessage(Int32 responseTo, IMessageEncoderSelector encoderSelector, MessageEncoderSettings messageEncoderSettings, CancellationToken cancellationToken) at MongoDB.Driver.Core.WireProtocol.CommandUsingCommandMessageWireProtocol`1.Execute(IConnection connection, CancellationToken cancellationToken) at MongoDB.Driver.Core.WireProtocol.CommandWireProtocol`1.Execute(IConnection connection, CancellationToken cancellationToken) at MongoDB.Driver.Core.Servers.Server.ServerChannel.ExecuteProtocol[TResult](IWireProtocol`1 protocol, CancellationToken cancellationToken) at MongoDB.Driver.Core.Servers.Server.ServerChannel.Command[TResult](ICoreSession session, ReadPreference readPreference, DatabaseNamespace databaseNamespace, BsonDocument command, IEnumerable`1 commandPayloads, IElementNameValidator commandValidator, BsonDocument additionalOptions, Action`1 postWriteAction, CommandResponseHandling responseHandling, IBsonSerializer`1 resultSerializer, MessageEncoderSettings messageEncoderSettings, CancellationToken cancellationToken) at MongoDB.Driver.Core.Operations.AsyncCursor`1.ExecuteGetMoreCommand(IChannelHandle channel, CancellationToken cancellationToken) at MongoDB.Driver.Core.Operations.AsyncCursor`1.GetNextBatch(CancellationToken cancellationToken) at MongoDB.Driver.Core.Operations.AsyncCursor`1.MoveNext(CancellationToken cancellationToken) at MongoDB.Driver.Core.Operations.AsyncCursorEnumerator`1.MoveNext()
In the collection we have 74160665 docs (avg. doc size 1.7KB). The query uses a multikey compound index with 5 fields (string, bool, bool, bool, array) and we are using projection to acquire the _id and a string type field. Our cluster consists of 3 data-bearing nodes and we use nearest readPreference. Some of the other tool instances are making writes on this collection parallel. The method which makes the read operation is executed in a synchronous fashion, and we tried to read the results into a cursor.
What could cause this behavior? If more info is needed I will try to provide it.
Sorry for the previous posting (2542), I accidentally pressed the enter key.