Deadlock and TimeoutException when acquiring connection.

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      The following code sample causes a deadlock and then a TimeoutException with message "Timeout waiting for a MongoConnection.":

      sample.cs
      using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Driver;

namespace TestApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            var srv = MongoServer.Create("mongodb://localhost/?maxpoolsize=1&waitqueuetimeoutms=5000");
            var coll = srv["log"]["log"];
            Parallel.For(0, 2, i => coll.Insert(new BsonDocument("fld1", "val1")));
        }
    }
}

      The core of problem is: "maxpoolsize" parameter (small value), number of iterations (more than "maxpoolsize") and the parallel execution.
      I can reproduce this bug only with small values of "maxpoolsize", but I marked this bug as "Major" because I looked at the driver code and I think this deadlock can occur for any value of "maxpoolsize".

              Assignee:
              Robert Stam
              Reporter:
              Pantyushin Roman
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                Created:
                Updated:
                Resolved: