Azure WadLogsTable 包含重复条目

Question

我有一个 Web 角色(2 个实例)和一个辅助角色(2 个实例)，这两个角色都使用以下配置

        DiagnosticMonitorTraceListener tmpListener = new DiagnosticMonitorTraceListener();
        System.Diagnostics.Trace.Listeners.Add(tmpListener);
        string wadConnectionString = "Microsoft.WindowsAzure.Plugins.Diagnostics.ConnectionString";
        CloudStorageAccount storageAccount =
        CloudStorageAccount.Parse(RoleEnvironment.GetConfigurationSettingValue(wadConnectionString));

        RoleInstanceDiagnosticManager roleInstanceDiagnosticManager =
        storageAccount.CreateRoleInstanceDiagnosticManager(RoleEnvironment.DeploymentId,
        RoleEnvironment.CurrentRoleInstance.Role.Name, RoleEnvironment.CurrentRoleInstance.Id);

        DiagnosticMonitorConfiguration config = roleInstanceDiagnosticManager.GetCurrentConfiguration();
        config.Logs.BufferQuotaInMB = 500;
        config.Logs.ScheduledTransferPeriod = TimeSpan.FromMinutes(1D);
        config.Logs.ScheduledTransferLogLevelFilter = LogLevel.Information;

        roleInstanceDiagnosticManager.SetCurrentConfiguration(config);

当我添加一些消息时，我注意到辅助角色将同一条目记录两次。我需要改变什么吗？

Answer 1

感谢您的通知，我很乐意再次在此处重新发布我的提示作为答案:

Visual Studio 中的某些项目模板已将 AzureDiagnosticMonitorTraceListener 的实例注册到 Trace.Listeners 集合。在添加新监听器之前，您可能需要检查是否已注册这样的监听器:

if (Trace.Listeners.OfType<AzureDiagnosticMonitorTraceListener>().Count() == 0)
{
    Trace.Listeners.Add(new AzureDiagnosticMonitorTraceListener());
}