Question

我的Log4Net配置如下所示：

  <appender name="MainLogFileAppender" type="log4net.Appender.RollingFileAppender">
    <param name="File" value="${log4net_log_file_name}"/>
    <param name="AppendToFile" value="true"/>
    <rollingStyle value="Size"/>
    <maxSizeRollBackups value="1"/>
    <maximumFileSize value="1MB"/>
    <staticLogFileName value="true"/>
    <layout type="log4net.Layout.XmlLayoutSchemaLog4j">
      <locationInfo value="true" />
    </layout>
  </appender>

  <appender name="MemoryAppender" type="log4net.Appender.MemoryAppender" >
    <onlyFixPartialEventData value="true" />
  </appender>
</log4net>

我们正在记录这样的例外情况：

 private readonly ILog _log = LogManager.GetLogger(typeof(LastChanceHandler));

        private void LogException(Exception ex)
        {
            _log.Fatal("Unhandled exception", ex);
        }

当我们记录错误时，我从未在日志中看到Throwable节点。使用当前布局是因为我们将XML转换为DTO并在UI中显示它们。

我没有找到任何解释为什么Throwable没有被设置并存储在日志中。任何想法（我正在考虑让我的开发盒扔掉。窗外）？

这是我日志中的错误：

<log4j:event logger="Hsbc.Ice.Shell.ViewModels.ShellViewModel" timestamp="1353076754456" level="ERROR" thread="1"><log4j:message>14 modules did not terminated in a timely manner : TradingCockpitModule,AuthenticationModule,ConfigurationModule,EntitlementsModule,Hsbc.Ice.CreditServices,EncryptionModule,ReportsModule,DiagnosticsModule,InterProcessCommunication,Layout,Logging,PersistenceModule,StorageModule,ICEExplorerManagerServiceModule</log4j:message><log4j:properties><log4j:data name="log4net:UserName" value="HBEU\steveget" /><log4j:data name="log4net:Identity" value="HBEU\steveget" /><log4j:data name="log4jmachinename" value="E8262XDZW4LZKEC" /><log4j:data name="log4japp" value="Hsbc.Ice.Shell.exe" /><log4j:data name="log4net:HostName" value="E8262XDZW4LZKEC" /></log4j:properties><log4j:locationInfo class="Hsbc.Ice.Shell.ViewModels.ShellViewModel" method="&lt;.ctor&gt;b__3" file="d:\CreditFlow\Tools\Hudson\data\jobs\Credit Shell\workspace\src\Shell\Hsbc.Ice.Shell\ViewModels\ShellViewModel.cs" line="107" /></log4j:event>

Answer 1

来自log4j documentation：

throwable：用于输出已绑定到的Throwable跟踪 LoggingEvent，默认情况下会输出完整的跟踪通常通过调用Throwable.printStackTrace（）找到。

Throwable是a Java class因此在.Net中不可用：也许可以替换异常堆栈跟踪，但它尚未实现。

Answer 2

只需更换;

     private void LogException(Exception ex)
    {
        _log.Fatal("Unhandled exception", ex);
    }

用;

    private void LogException(Exception ex)
    {
        _log.Fatal("Unhandled exception:" + ex.ToString(), ex);
    }

您还可以使用ex.StackTrace()获取信息。

如果您想在.NET中使用整个堆栈跟踪

在.NET中没有可抛出的配置（或者至少我在文档中找不到任何关于它的东西），搜索只产生有意义的Java结果，因为在C＃中没有throwable

Answer 3

在完成答案之后，我决定尝试一些基于Stuart Dunkeld的答案（上面给他答案，我已经把它放在这里以求完整性）。

基本上，我创建了一个从现有布局xml格式化程序继承并覆盖的自定义布局：

重写方法中的重要部分是：

    if (exceptionString!=null && !string.IsNullOrEmpty(exceptionString.StackTrace))
    {
        writer.WriteStartElement("log4j:throwable");
        Transform.WriteEscapedXmlString(writer, exceptionString.StackTrace, InvalidCharReplacement);
        writer.WriteEndElement();
    }

为了完整，这是全班。这允许我们捕获错误的堆栈跟踪以及它的消息：

   public class Log4NetErrorLogger : XmlLayoutSchemaLog4j
    {
        private static readonly DateTime Date1970 = new DateTime(1970, 1, 1);
        protected override void FormatXml(XmlWriter writer, LoggingEvent loggingEvent)
        {
            if (loggingEvent.LookupProperty("log4net:HostName") != null &&
                loggingEvent.LookupProperty("log4jmachinename") == null)
            {
                loggingEvent.GetProperties()["log4jmachinename"] = loggingEvent.LookupProperty("log4net:HostName");
            }
            if (loggingEvent.LookupProperty("log4japp") == null && !string.IsNullOrEmpty(loggingEvent.Domain))
            {
                loggingEvent.GetProperties()["log4japp"] = loggingEvent.Domain;
            }
            if (!string.IsNullOrEmpty(loggingEvent.Identity) &&
                loggingEvent.LookupProperty("log4net:Identity") == null)
            {
                loggingEvent.GetProperties()["log4net:Identity"] = loggingEvent.Identity;
            }
            if (!string.IsNullOrEmpty(loggingEvent.UserName) &&
                loggingEvent.LookupProperty("log4net:UserName") == null)
            {
                loggingEvent.GetProperties()["log4net:UserName"] = loggingEvent.UserName;
            }
            writer.WriteStartElement("log4j:event");
            writer.WriteAttributeString("logger", loggingEvent.LoggerName);
            writer.WriteAttributeString("timestamp",
                                        XmlConvert.ToString(
                                            (long)
                                            (loggingEvent.TimeStamp.ToUniversalTime() - Date1970)
                                                .TotalMilliseconds));
            writer.WriteAttributeString("level", loggingEvent.Level.DisplayName);
            writer.WriteAttributeString("thread", loggingEvent.ThreadName);
            writer.WriteStartElement("log4j:message");
            Transform.WriteEscapedXmlString(writer, loggingEvent.RenderedMessage, InvalidCharReplacement);
            writer.WriteEndElement();
            object obj = loggingEvent.LookupProperty("NDC");
            if (obj != null)
            {
                string text = loggingEvent.Repository.RendererMap.FindAndRender(obj);
                if (!string.IsNullOrEmpty(text))
                {
                    writer.WriteStartElement("log4j:NDC");
                    Transform.WriteEscapedXmlString(writer, text, InvalidCharReplacement);
                    writer.WriteEndElement();
                }
            }
            PropertiesDictionary properties = loggingEvent.GetProperties();
            if (properties.Count > 0)
            {
                writer.WriteStartElement("log4j:properties");
                foreach (DictionaryEntry dictionaryEntry in properties)
                {
                    writer.WriteStartElement("log4j:data");
                    writer.WriteAttributeString("name", (string) dictionaryEntry.Key);
                    string text = loggingEvent.Repository.RendererMap.FindAndRender(dictionaryEntry.Value);
                    writer.WriteAttributeString("value", text);
                    writer.WriteEndElement();
                }
                writer.WriteEndElement();
            }
            var exceptionString = loggingEvent.ExceptionObject;
            if (exceptionString!=null && !string.IsNullOrEmpty(exceptionString.StackTrace))
            {
                writer.WriteStartElement("log4j:throwable");
                Transform.WriteEscapedXmlString(writer, exceptionString.StackTrace, InvalidCharReplacement);
                writer.WriteEndElement();
            }
            if (LocationInfo)
            {
                LocationInfo locationInformation = loggingEvent.LocationInformation;
                writer.WriteStartElement("log4j:locationInfo");
                writer.WriteAttributeString("class", locationInformation.ClassName);
                writer.WriteAttributeString("method", locationInformation.MethodName);
                writer.WriteAttributeString("file", locationInformation.FileName);
                writer.WriteAttributeString("line", locationInformation.LineNumber);
                writer.WriteEndElement();
            }
            writer.WriteEndElement();
        }
    }

如何使用XmlLayoutSchemaLog4j布局在Log4Net中记录throwable？

3 个答案: