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Server Crashes after 1000 entries to Database

See original GitHub issue

I am using Abp 1.5.1 and using the code below to make database inserts:

[AbpAllowAnonymous]
        private async Task InsertPreOrders(List<TransactionItem> request, long batchId, long custRef, int serviceId, int tenantId, string service, string type)
        {
            foreach (var item in request)
            {
                var ledger = new CustomerLedgerEntry();
                ledger.CustReference = custRef;    
                ledger.DebitAmount = 0.0m;
                ledger.CreditAmount = item.Amount;
                ledger.Type = type;
                ledger.ServiceId = serviceId;
                ledger.TenantId = tenantId;
                ledger.AccountType = item.AccountType;
                ledger.ProductId = serviceId.ToString();
                ledger.ProductName = item.ProductName;
                ledger.Description = item.Description;
                ledger.CustomerTransactionBatchId = batchId;
                ledger.ServiceName = service;
                ledger.DrawId = item.DrawId;
                ledger.DrawTitle = item.DrawTitle;
                ledger.CreationTime = DateTime.UtcNow;
                ledger.TransactionTime = item.TransactionTime;
                await _entryRepository.InsertAsync(ledger);
            }
        }

When I insert 10 items, there is usually no problem. But when I insert say 2,000 items, IIS crashes, and I get this error in the Event Viewer:

Application: Platinum.CRM.Web.Mvc.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.ObjectDisposedException
   at System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean ByRef)
   at System.StubHelpers.StubHelpers.SafeHandleAddRef(System.Runtime.InteropServices.SafeHandle, Boolean ByRef)
   at Microsoft.AspNetCore.Server.Kestrel.Internal.Networking.Libuv+NativeMethods.uv_async_send(Microsoft.AspNetCore.Server.Kestrel.Internal.Networking.UvAsyncHandle)
   at Microsoft.AspNetCore.Server.Kestrel.Internal.Networking.Libuv.async_send(Microsoft.AspNetCore.Server.Kestrel.Internal.Networking.UvAsyncHandle)
   at Microsoft.AspNetCore.Server.Kestrel.Internal.KestrelThread.PostCloseHandle(System.Action`1<IntPtr>, IntPtr)
   at Microsoft.AspNetCore.Server.Kestrel.Internal.Networking.UvHandle.ReleaseHandle()
   at Microsoft.AspNetCore.Server.Kestrel.Internal.Networking.UvStreamHandle.ReleaseHandle()
   at System.Runtime.InteropServices.SafeHandle.InternalFinalize()
   at System.Runtime.InteropServices.SafeHandle.Dispose(Boolean)
   at System.Runtime.InteropServices.SafeHandle.Finalize()

Please what can I do about this? We are in production and this is killing me!