EndOfStreamException on primary server failover - mongodb

Question

When performing a failover on our cluster, the following EndOfStreamException is thrown every time (but only once) before the application successfully utilises the newly elected primary.
I am using 2.5.0 of the .NET Driver and also providing the replica set name in the connection string:
var url = MongoUrl.Create("mongodb://<dbuser>:<dbpassword>#ds012345-a0.mlab.com:56789,ds012345-a1.mlab.com:56790/<dbname>?replicaSet=rs-ds012345");
var client = new MongoClient(new MongoClientSettings()
{
Servers = url.Servers,
Credentials = credentials
});
Exception:
MongoDB.Driver.MongoConnectionException: An exception occurred while
receiving a message from the server. --->
System.IO.EndOfStreamException: Attempted to read past the end of the
stream. at
MongoDB.Driver.Core.Misc.StreamExtensionMethods.d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Connections.BinaryConnection.d__51.MoveNext()
--- End of inner exception stack trace --- at MongoDB.Driver.Core.Connections.BinaryConnection.d__51.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Connections.BinaryConnection.d__52.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Connections.BinaryConnection.d__54.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.WireProtocol.CommandWireProtocol1.<ExecuteAsync>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Servers.Server.ServerChannel.<ExecuteProtocolAsync>d__261.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Operations.CommandOperationBase1.<ExecuteProtocolAsync>d__29.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Operations.ReadCommandOperation1.d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Operations.FindCommandOperation1.<ExecuteAsync>d__111.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.Core.Operations.FindOperation1.d__111.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.OperationExecutor.d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.MongoCollectionImpl1.d__601.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
MongoDB.Driver.IAsyncCursorSourceExtensions.<ToListAsync>d__161.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)

Answer 1

I was also facing the same error, but it was coming alternatively. Once request success and second fail with the above error.
To solve this issue, I used using like below
using (var cursor = await _mongoDb.GetCollection<BsonDocument>(CollectionName)
.FindAsync(queryJson.ToString(), options))
{
//operation
}
Please check if this resolves your issues too.
Thanks