we are trying to connect to the mongo server using a .net driver

and getting this message ""The wait queue for acquiring a connection to server 172.168.12.100:27017 is full."

the exception
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.AcquireConnectionHelper.CheckingOutConnection() in D:\jenkins\workspace\mongo-csharp-driver-2.2.x-build\src\MongoDB.Driver.Core\Core\ConnectionPools\ExclusiveConnectionPool.cs:line 411
at MongoDB.Driver.Core.ConnectionPools.ExclusiveConnectionPool.<AcquireConnectionAsync>d__35.MoveNext() in D:\jenkins\workspace\mongo-csharp-driver-2.2.x-build\src\MongoDB.Driver.Core\Core\ConnectionPools\ExclusiveConnectionPool.cs:line 177
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
at MongoDB.Driver.Core.Servers.ClusterableServer.<GetChannelAsync>d__40.MoveNext() in D:\jenkins\workspace\mongo-csharp-driver-2.2.x-build\src\MongoDB.Driver.Core\Core\Servers\ClusterableServer.cs:line 226
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
at MongoDB.Driver.Core.Operations.BulkMixedWriteOperation.<ExecuteAsync>d__39.MoveNext() in D:\jenkins\workspace\mongo-csharp-driver-2.2.x-build\src\MongoDB.Driver.Core\Core\Operations\BulkMixedWriteOperation.cs:line 204
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
at MongoDB.Driver.OperationExecutor.<ExecuteWriteOperationAsync>d__3`1.MoveNext() in D:\jenkins\workspace\mongo-csharp-driver-2.2.x-build\src\MongoDB.Driver\OperationExecutor.cs:line 46
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
at MongoDB.Driver.MongoCollectionImpl`1.<ExecuteWriteOperationAsync>d__61`1.MoveNext() in D:\jenkins\workspace\mongo-csharp-driver-2.2.x-build\src\MongoDB.Driver\MongoCollectionImpl.cs:line 759
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
at MongoDB.Driver.MongoCollectionImpl`1.<BulkWriteAsync>d__22.MoveNext() in D:\jenkins\workspace\mongo-csharp-driver-2.2.x-build\src\MongoDB.Driver\MongoCollectionImpl.cs:line 179
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at W6BigDataStore.W6MongoDBProvider`1.<InsertDataAsync>d__9.MoveNext() in C:\Workspace\MultiTenant2\SO\Infrastructure\source\Audit\W6BigDataStore\W6BigDataStore\W6MongoDBProvider.cs:line 84