end-of-file on communication channel

есть сервис который запускаеться каждый день с помошью QuartZ, но например стартанул сервис сегодня все идет хорошо, все работает, но на следуший день выдает такую ошибку:

end-of-file on communication channel Process ID: 9978 Session ID: 1183 Serial number: 50314

вроде все написано хорошо, все написано в using, почему может вывести такую ошибку? использую базу Oracle

и logger показывает где произашло ошибка:

PigRep.cs:line 86

public async Task InsertNotification(DateTime date, int statusId)
        {
            using (OracleConnection conn = new OracleConnection(ConnectionStringConfiguration.Oracle_LBANK))
            {
                using (OracleCommand cmd = new OracleCommand("ASW.NOTIFICATION", conn))
                {
                    cmd.CommandType = CommandType.StoredProcedure;
                    await cmd.Connection.OpenAsync();
                    cmd.Parameters.Add(new OracleParameter("DATE", OracleDbType.Date) { Value = date });
                    cmd.Parameters.Add(new OracleParameter("STATUS_ID", OracleDbType.Decimal) { Value = statusId });

                    await cmd.ExecuteNonQueryAsync(); //line 86
                }
            }

PigSer.cs:line 138

public async Task InsertNotification(DateTime date, int statusId)
{
    await _pig.InsertNotification(date.Date, statusId); //line 138
}

PigJob.cs:line 32"

internal class SmsSenderJob : IJob
    {
        public async Task Execute(IJobExecutionContext context)
        {
            ILogger _logger = (ILogger)context.JobDetail.JobDataMap.Get("logger");
            IServiceProvider _provider = (IServiceProvider)context.JobDetail.JobDataMap.Get("provider");
            _logger.LogInformation("Job Executing Started");

            using (IServiceScope _scope = _provider.CreateScope())
            {
                PigSer pig = _scope.ServiceProvider.GetRequiredService<IPigSer>();
                try
                {
                    //insert log when process starts
                    DateTime now = DateTime.Now;
                    await pigg.InsertNotification(now, (int)SmsNotification.StartTheProcess);

                    DateTime workingDay = await pigg.GetWorkingDay(now); //line 32
                 }
           }
   }

вот полная ошибка: "Oracle.DataAccess.Client.OracleException (0x80004005): ORA-03113: end-of-file on communication channel\nProcess ID: 28370\nSession ID: 409 Serial number: 64698\r\n at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure, Boolean bCheck, Int32 isRecoverable, OracleLogicalTransaction m_OracleLogicalTransaction)\r\n at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, String procedure, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, Boolean bCheck, OracleLogicalTransaction m_OracleLogicalTransaction)\r\n at Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery()\r\n at System.Data.Common.DbCommand.ExecuteNonQueryAsync(CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at PigJob.Worker.Repositories.PigRep.d__2.MoveNext() in D:\Jenkins\workspace\Test\Test-01\Windows-Services\LB.PigJob\Build\PigJob.Worker\Repositories\PigRep.cs:line 86\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at PigJob.Worker.Services.PigSer.d__12.MoveNext() in D:\Jenkins\workspace\Test\Test-01\Windows-Services\LB.PigJob\Build\PigJob.Worker\Services\PigSer.cs:line 138\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at PigJob.Worker.Job.SmsSenderJob.d__0.MoveNext() in D:\Jenkins\workspace\Test\Test-01\Windows-Services\LB.PigJob\Build\PigJob.Worker\Job\SmsSenderJob.cs:line 32", "cst": "PigJob.Worker.Job.SmsSenderJob.Execute, line 32.",