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FirebirdClient 中的连接池似乎已损坏。它应该在我的查询已经为空时排队，但我得到了一个异常。我需要帮助如何处理这个问题。

我正在使用 FirebirdClient 版本 7.1.1。我正在运行一个控制台 .Net Core 应用程序（版本 2.2.0）并且我正在连接 Firebird 3.0。我执行 4 个并发查询。我将 MaxPoolSize 设置为 2。因此没有足够的连接来执行所有查询。

using System;
using System.Threading.Tasks;
using FirebirdSql.Data.FirebirdClient;

namespace ConsoleApp3
{
    class Program
    {
        private const string connStr =
            "User=SYSDBA;Password=***;Database=/opt/firebird/bases/db.fdb;DataSource=192.168.2.1;Port=3050;Connection lifetime=15;Pooling=true; MinPoolSize=0;MaxPoolSize=2;";

        private static void Connect(string name)
        {
            Console.WriteLine($">>>>>>STARTING>>>>>>>>>>>> {name}");

            var cmd = new FbCommand(
                "select count(*) from MON$ATTACHMENTS a where a.mon$remote_process like '%ConsoleApp3.dll'");
            using (cmd.Connection = new FbConnection(connStr))
            {
                try
                {
                    cmd.Connection.Open();
                    var id = Convert.ToInt32(cmd.ExecuteScalar());
                    Task.Delay(1000);
                    Console.WriteLine($">>>>>>Done>>>>>>>>>>>> {name} RESULT {id}");
                }
                catch (Exception e)
                {
                    Console.WriteLine($">>>>>>>ERROR>>>>>>>>>>> {name}");
                    Console.WriteLine(e);
                }
            }
        }

        static void Main(string[] args)
        {
            var t1 = Task.Run(() => Connect("conn1"));
            var t2 = Task.Run(() => Connect("conn2"));
            var t3 = Task.Run(() => Connect("conn3"));
            var t4 = Task.Run(() => Connect("conn4"));

            Task.WaitAll(t1, t2, t3, t4);

            Console.WriteLine(">>>>>>>>>>>> DONE>>>>>>>>>>>>>>>");
            Console.ReadKey();
        }
    }
}

我希望当与数据库的连接将被回收到连接池时，没有空闲连接的查询将排队并执行，但我得到以下异常：

System.InvalidOperationException: Connection pool is full.
   at FirebirdSql.Data.FirebirdClient.FbConnectionPoolManager.Pool.CreateNewConnectionIfPossibleImpl(ConnectionString connectionString)
   at FirebirdSql.Data.FirebirdClient.FbConnectionPoolManager.Pool.GetConnection(FbConnection owner)
   at FirebirdSql.Data.FirebirdClient.FbConnection.Open()
   at ConsoleApp3.Program.Connect(String name) in C:\Projects\ConsoleApp3\ConsoleApp3\Program.cs:line 22
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