SemanticLogging 在 EventSource 的命令处理中抛出异常

Question

在某些机器上（可能只在 Windows 7 和 2008 R2 上但不在 Windows 10 上）我在使用 SemanticLogging 时遇到问题。当我运行它时，我收到休闲输出：

Event Trace Session prefix: Microsoft-SemanticLogging-Etw

Sink name: ConsoleEventSink
Event sources:
Name: 8943bf09-be18-551a-efe5-612ee62ded5e
Performance, Level: LogAlways, MatchAnyKeyword: None

Sink name: PerformaceSINK
Event sources:
Name: 8943bf09-be18-551a-efe5-612ee62ded5e
Performance, Level: LogAlways, MatchAnyKeyword: None

Service started.

Press enter to end ...
ERROR: Exception in Command Processing for EventSource Performance: Object
reference not set to an instance of an object.;

特定场景下发生的一切：

我正在启动写入事件的进程
然后我运行 SemanticLogging-svc.exe -c
几分钟后发生错误

但是当我改变顺序并首先开始 SemanticLogging-svc.exe 然后我运行 “event writer”, 一切正常。

但是当我按照第一个场景中的描述设置所有内容并在出现错误后，我将尝试使用 PerfView 收集数据，奇迹发生了并且 SemanticLogging 开始收集数据。

使用 PerfView 我检查了 Microsoft-SemanticLogging-Etw 来源，但那里什么也没有。

语义日志-svc.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns="http://schemas.microsoft.com/practices/2013/entlib/semanticlogging/etw"
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:schemaLocation="http://schemas.microsoft.com/practices/2013/entlib/semanticlogging/etw SemanticLogging-svc.xsd">
  <traceEventService />
  <sinks>
    <consoleSink name="ConsoleEventSink">
      <sources>
        <eventSource name="PerformanceEventSource" level="LogAlways" />
      </sources>
      <customEventTextFormatter type="ServiceTelemetry.EventFormatter.CsvEventFormatter, ServiceTelemetry"/>
    </consoleSink>
    <rollingFlatFileSink
      name="PerformanceEventSourceSINK"
      fileName=".\logs\%ComputerName%_Performance.log"
      rollFileExistsBehavior="Increment"
      rollInterval="Midnight"
      timeStampPattern="yyyyMMdd">
      <sources>
        <eventSource name="PerformanceEventSource" level="LogAlways" />
      </sources>
      <customEventTextFormatter type="ServiceTelemetry.EventFormatter.CsvEventFormatter, ServiceTelemetry"/>
    </rollingFlatFileSink>
   </sinks>
</configuration>

EventFormatter:

namespace ServiceTelemetry.EventFormatter
{
    public class CsvEventFormatter : IEventTextFormatter
    {
        public void WriteEvent(EventEntry eventEntry, TextWriter writer)
        {
            StringBuilder sb = new StringBuilder();

            for (int i = 0; i < eventEntry.Payload.Count; i++)
            {
                sb.AppendFormat("{0};", eventEntry.Payload[i]);
            }
            writer.WriteLine(sb.ToString());
        }

    }
}

事件源:

namespace ServiceTelemetry.EventSources
{
    [EventSource(Name = "Performance")]
    public sealed class PerformanceEventSource : EventSource
    {
        [Event(1, Level = EventLevel.LogAlways, Task = TaskCodes.GetResource, Opcode = OperationCodes.Compleated)]
        public void GetResourceSuccess(string Session, string ResourceName, long ElapsedMilliseconds)
        {
            if (IsEnabled())
            {
                WriteEvent(1, Session, ResourceName, ElapsedMilliseconds);
            }
        }

        public static PerformanceEventSource Log = new PerformanceEventSource();

        private PerformanceEventSource()
        {

        }
    }
}

Answer 1

需要先安装manifest，然后你就可以启动你的EventWriter，你可以在启动SematicLogger的任何时候收集数据。不幸的是系统抛出错误，但现在我对此很满意。

EventSource .net 4.0 GenerateManifest

SemanticLogging 在 EventSource 的命令处理中抛出异常

SemanticLogging throws Exception in Command Processing for EventSource

etw

semantic-logging