远程性能计数器 System.InvalidOperationException答案

【问题标题】：Remote Performance Counters System.InvalidOperationException远程性能计数器 System.InvalidOperationException
【发布时间】：2015-02-16 04:15:30
【问题描述】：

我有 2 段代码偶尔会抛出错误。如果我在 server.FullyQualifiedDomainName 中定义的服务器上本地运行应用程序，我不会收到任何错误，永远不会。如果我远程运行应用程序并通过网络读取计数器，我将得到下面定义的错误。错误不会一直发生。我在某处读过网络上的性能计数器有点不稳定...无论如何要获得更可靠的响应？

读取类别的代码：

var windowsCounterCategory = new PerformanceCounterCategory(counterCategory, server.FullyQualifiedDomainName); 
var serviceGuidsStr = windowsCounterCategory.GetInstanceNames();

错误：

System.InvalidOperationException: Could not Read Category Index: 8324.
   at System.Diagnostics.CategorySample..ctor(Byte[] data, CategoryEntry entry, PerformanceCounterLib library)
   at System.Diagnostics.PerformanceCounterLib.GetCategorySample(String category)
   at System.Diagnostics.PerformanceCounterLib.GetCategorySample(String machine, String category)
   at System.Diagnostics.PerformanceCounterCategory.GetCounterInstances(String categoryName, String machineName)
   at System.Diagnostics.PerformanceCounterCategory.GetInstanceNames()

读取计数器值的代码：

   using (var perfomanceCounter = new PerformanceCounter(categoryName, counterName, instanceId, Service.Server.FullyQualifiedDomainName))
   {
      var counterValue = perfomanceCounter.RawValue;
      log.Trace("Read counter value " + counterValue.ToString());
      return counterValue;
   }

错误：

System.InvalidOperationException: Could not Read Category Index: 8324.
   at System.Diagnostics.CategorySample..ctor(Byte[] data, CategoryEntry entry, PerformanceCounterLib library)
   at System.Diagnostics.PerformanceCounterLib.GetCategorySample(String category)
   at System.Diagnostics.PerformanceCounterLib.GetCategorySample(String machine, String category)
   at System.Diagnostics.PerformanceCounter.NextSample()
   at System.Diagnostics.PerformanceCounter.get_RawValue()

【问题讨论】：

标签： c# .net performancecounter system.diagnostics

【解决方案1】：

似乎通过网络读取性能计数器根本不是超级可靠。我决定使用 Microsoft 瞬态故障处理库（v 6.0，在 nuget 上搜索黄玉）并实施重试策略。通常重试一次就足以得到有效答案（没有异常），有时可能需要重试 2 次。

我实施了一种瞬态故障检测策略来检查特定的网络相关错误 (System.InvalidOperationException: Could not Read Category Index: 8324.)

public class PerformanceCounterStrategy : ITransientErrorDetectionStrategy
{
  public bool IsTransient(Exception ex)
  {
    return ex.GetType() == typeof (InvalidOperationException);
  }
}

这是我实现的重试策略：

var retryStrategy = new Incremental(3, 2, 2);
var retryPolicy = new RetryPolicy<PerformanceCounterTransientStrategy>(retryStrategy);

retryPolicy.ExecuteAction(() =>
  {
    var windowsCounterCategory = new PerformanceCounterCategory(counterCategory, server.FQDN);
    var guidsStr = windowsCounterCategory.GetInstanceNames();

  });

【讨论】：