[英]log4net logging error in mysql database logging
我正在使用 log4net 登錄 mysql 數據庫。 log4net 配置是正確的,因為我已經測試過登錄 sql 服務器和文件,但是當我在 mysql 數據庫中寫入日志時,它會提示我一個錯誤。
我的 log4net 配置如下
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6"/>
</startup>
<log4net>
<appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
<bufferSize value="1" />
<connectionType value="MySql.Data.MySqlClient.MySqlConnection, MySql.Data" />
<connectionString value="Server=127.0.0.1;Database=logdb;Uid=abc;Pwd=abc;" />
<commandText value="INSERT INTO log (timestamp,Thread,Level,Logger,Message) VALUES (?log_date, ?thread, ?log_level, ?logger, ?message);" />
<parameter>
<parameterName value="?log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.RawTimeStampLayout" />
</parameter>
<parameter>
<parameterName value="?thread" />
<dbType value="String" />
<size value="32" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%thread" />
</layout>
</parameter>
<parameter>
<parameterName value="?log_level" />
<dbType value="String" />
<size value="32" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level" />
</layout>
</parameter>
<parameter>
<parameterName value="?logger" />
<dbType value="String" />
<size value="256" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%logger" />
</layout>
</parameter>
<parameter>
<parameterName value="?message" />
<dbType value="String" />
<size value="4000" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message" />
</layout>
</parameter>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="AdoNetAppender" />
</root>
</log4net>
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add name="textWriterTraceListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="C:\Logs\log4net.txt"/>
</listeners>
</trace>
</system.diagnostics>
</configuration>
日志消費代碼在這里
class Program
{
private static readonly ILog Logger = LogManager.GetLogger(System.Environment.MachineName);
static void Main(string[] args)
{
log4net.Config.XmlConfigurator.Configure();
Logger.Info("Testing information log from .Net app");
Logger.Debug("Testing Debug log from .Net app");
Logger.Fatal("Testing Fatal log from .Net app");
}
}
我也是匯編文件中的“ [assembly: log4net.Config.XmlConfigurator(ConfigFile = "Web.config", Watch = true)]
"這一行。 我遇到的錯誤是
**
log4net:ERROR [AdoNetAppender] ErrorCode: GenericFailure. Exception while writing to database
System.InvalidOperationException: Parameter '?log_date' was not found during prepare.
at MySql.Data.MySqlClient.PreparableStatement.Prepare()
at MySql.Data.MySqlClient.MySqlCommand.Prepare(Int32 cursorPageSize)
at MySql.Data.MySqlClient.MySqlCommand.Prepare()
at log4net.Appender.AdoNetAppender.SendBuffer(IDbTransaction dbTran, LoggingEvent[] events)
at log4net.Appender.AdoNetAppender.SendBuffer(LoggingEvent[] events)
log4net: Shutdown called on Hierarchy [log4net-default-repository]
**
但實際上我傳遞了所有必需的參數,不知道為什么會出現這個錯誤。
任何人都可以指導。
這是 MySql.Data 中的錯誤。 據我所知,沒有針對它提交的錯誤報告,但您可以從MySqlConnector 集成測試中看到,如果在添加參數之前調用MySqlCommand.Prepare
,MySql.Data 將失敗。
然而,這正是AdoNetAppender
所做的。 (該代碼中有一個try
/ catch
塊,但這是 2.0.12 之后的最新更改。)
有兩種可能的修復方法:
<connectionType />
以使用它。IgnorePrepare=true
添加到 MySql.Data 連接字符串,這將導致Prepare
成為無操作。 (注意:此選項已在 8.0.24 中刪除。)正如@Bradley Grainger 提到的,MySqlConnector 完成了這項工作
遺憾的是,我無法發表評論,但@hashimkayani 要求舉個例子,我確實試過了,效果很好:
<?xml version="1.0"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
<log4net>
<appender name="dbAppender" type="log4net.Appender.AdoNetAppender">
<bufferSize value="1" />
<connectionType value="MySqlConnector.MySqlConnection, MySqlConnector" />
<connectionString value="Server=localhost;Database=dbName;Uid=dbUser;Pwd=dbPassword;persistsecurityinfo=True;SslMode=none;" />
<commandText value="INSERT INTO afmlog(date, thread, level, logger, message) VALUES (@log_date, @thread, @log_level, @logger, @message);" />
<parameter>
<parameterName value="@log_date" />
<dbType value="DateTime" />
<layout type="log4net.Layout.PatternLayout" value="%date{yyyy'-'MM'-'dd HH':'mm':'ss'.'fff}" />
</parameter>
<parameter>
<parameterName value="@thread" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout" value="%thread" />
</parameter>
<parameter>
<parameterName value="@log_level" />
<dbType value="String" />
<size value="50" />
<layout type="log4net.Layout.PatternLayout" value="%level" />
</parameter>
<parameter>
<parameterName value="@logger" />
<dbType value="String" />
<size value="255" />
<layout type="log4net.Layout.PatternLayout" value="%logger" />
</parameter>
<parameter>
<parameterName value="@message" />
<dbType value="String" />
<size value="4000" />
<layout type="log4net.Layout.PatternLayout" value="%message" />
</parameter>
</appender>
</log4net>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add
name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\temp\log4net.txt" />
</listeners>
</trace>
</system.diagnostics>
</configuration>
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