Hi,
We have a dotNet 6 Web Application running in IIS. The application was working alright. Yesterday for 15 minutes continuously the connection to MongoDB timed-out and then auto recovered by itself. The exception seen in the application log is:
MongoDB.Driver.MongoConnectionException: An exception occurred while opening a connection to the server.
---> System.Net.Internals.SocketExceptionFactory+ExtendedSocketException (10060): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. xx.xx.xx.xx:27017
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
at MongoDB.Driver.Core.Connections.TcpStreamFactory.Connect(Socket socket, EndPoint endPoint, CancellationToken cancellationToken)
at MongoDB.Driver.Core.Connections.TcpStreamFactory.CreateStream(EndPoint endPoint, CancellationToken cancellationToken)
at MongoDB.Driver.Core.Connections.SslStreamFactory.CreateStream(EndPoint endPoint, CancellationToken cancellationToken)
at MongoDB.Driver.Core.Connections.BinaryConnection.OpenHelper(CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at MongoDB.Driver.Core.Connections.BinaryConnection.OpenHelper(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Connections.BinaryConnection.Open(CancellationToken cancellationToken)
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.PooledConnection.Open(CancellationToken cancellationToken)
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.ConnectionCreator.CreateOpenedOrReuse(CancellationToken cancellationToken)
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.AcquireConnectionHelper.AcquireConnection(CancellationToken cancellationToken)
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.AcquireConnection(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Servers.Server.GetChannel(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Bindings.ServerChannelSource.GetChannel(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Bindings.ChannelSourceHandle.GetChannel(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Operations.RetryableReadContext.Initialize(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Operations.RetryableReadContext.Create(IReadBinding binding, Boolean retryRequested, CancellationToken cancellationToken)
at MongoDB.Driver.Core.Operations.FindOperation`1.Execute(IReadBinding binding, CancellationToken cancellationToken)
at MongoDB.Driver.OperationExecutor.ExecuteReadOperation[TResult](IReadBinding binding, IReadOperation`1 operation, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.ExecuteReadOperation[TResult](IClientSessionHandle session, IReadOperation`1 operation, ReadPreference readPreference, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.ExecuteReadOperation[TResult](IClientSessionHandle session, IReadOperation`1 operation, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.FindSync[TProjection](IClientSessionHandle session, FilterDefinition`1 filter, FindOptions`2 options, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.<>c__DisplayClass48_0`1.<FindSync>b__0(IClientSessionHandle session)
at MongoDB.Driver.MongoCollectionImpl`1.UsingImplicitSession[TResult](Func`2 func, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.FindSync[TProjection](FilterDefinition`1 filter, FindOptions`2 options, CancellationToken cancellationToken)
at MongoDB.Driver.FindFluent`2.ToCursor(CancellationToken cancellationToken)
at MongoDB.Driver.IAsyncCursorSourceExtensions.FirstOrDefault[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)
at MongoDB.Driver.IFindFluentExtensions.FirstOrDefault[TDocument,TProjection](IFindFluent`2 find, CancellationToken cancellationToken)
After 30 seconds this error was seen in the log:
MongoDB.Driver.MongoConnectionPoolPausedException: The connection pool is in paused state for server xxxyyyy-shard-00-01.xxxx.mongodb.net:27017.
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.PoolState.ThrowIfNotReady()
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.ConnectionCreator.CreateOpenedOrReuse(CancellationToken cancellationToken)
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.AcquireConnectionHelper.AcquireConnection(CancellationToken cancellationToken)
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.AcquireConnection(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Servers.Server.GetChannel(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Bindings.ServerChannelSource.GetChannel(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Bindings.ChannelSourceHandle.GetChannel(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Operations.RetryableReadContext.Initialize(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Operations.RetryableReadContext.Create(IReadBinding binding, Boolean retryRequested, CancellationToken cancellationToken)
at MongoDB.Driver.Core.Operations.FindOperation`1.Execute(IReadBinding binding, CancellationToken cancellationToken)
at MongoDB.Driver.OperationExecutor.ExecuteReadOperation[TResult](IReadBinding binding, IReadOperation`1 operation, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.ExecuteReadOperation[TResult](IClientSessionHandle session, IReadOperation`1 operation, ReadPreference readPreference, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.ExecuteReadOperation[TResult](IClientSessionHandle session, IReadOperation`1 operation, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.FindSync[TProjection](IClientSessionHandle session, FilterDefinition`1 filter, FindOptions`2 options, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.<>c__DisplayClass48_0`1.<FindSync>b__0(IClientSessionHandle session)
at MongoDB.Driver.MongoCollectionImpl`1.UsingImplicitSession[TResult](Func`2 func, CancellationToken cancellationToken)
at MongoDB.Driver.MongoCollectionImpl`1.FindSync[TProjection](FilterDefinition`1 filter, FindOptions`2 options, CancellationToken cancellationToken)
at MongoDB.Driver.FindFluent`2.ToCursor(CancellationToken cancellationToken)
at MongoDB.Driver.IAsyncCursorSourceExtensions.FirstOrDefault[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)
at MongoDB.Driver.IFindFluentExtensions.FirstOrDefault[TDocument,TProjection](IFindFluent`2 find, CancellationToken cancellationToken)
The connection string is in the following format:
mongodb+srv://xxxxxxxxx:yyyyyyyyy@zzzzzzzz.mongodb.net/
Any suggestions or another option to diagnose this?
