log4net

Question

我在我的 WebAPI 应用程序中使用 log4net 的 AdoNetAppender。每隔几周，记录器就会突然停止记录，只有在我重新启动 Web 服务后，它才会再次开始记录。我已经向 appender 添加了一个实现 IErrorHandler 的自定义 ErrorHandler，以便捕获任何异常，如下所示：

public class MyErrorHandler : IErrorHandler
{
    private AdoNetAppender ParentAppender { get; set; }
    public MyErrorHandler(AdoNetAppender parentAppender)
    {
        ParentAppender = parentAppender;
    }
    public void Error(string message)
    {
        Debug.WriteLine(message);
    }

    public void Error(string message, Exception ex)
    {
        Debug.WriteLine(message + " ,Exception:" + ex.ToString());
    }

    public void Error(string message, Exception ex, ErrorCode errorCode)
    {

    }
}

，这些是我收到的消息和异常：

Exception while writing to database

System.InvalidOperationException: The requested operation cannot be completed because the connection has been broken.
   at System.Data.SqlClient.SqlInternalConnectionTds.ExecuteTransaction(TransactionRequest transactionRequest, String name, IsolationLevel iso, SqlInternalTransaction internalTransaction, Boolean isDelegateControlRequest)
   at System.Data.SqlClient.SqlInternalConnection.BeginSqlTransaction(IsolationLevel iso, String transactionName, Boolean shouldReconnect)
   at System.Data.SqlClient.SqlConnection.BeginTransaction(IsolationLevel iso, String transactionName)
   at System.Data.SqlClient.SqlConnection.BeginDbTransaction(IsolationLevel isolationLevel)
   at System.Data.Common.DbConnection.System.Data.IDbConnection.BeginTransaction()
   at log4net.Appender.AdoNetAppender.SendBuffer(LoggingEvent[] events)

我已经在 appender 中将 ReconnectOnError 属性设置为 true，但它不会使其重新连接。如何让 appender 重新建立与数据库的连接，或者如何重新初始化 appender？顺便说一句，我将 appender 传递给 ErrorHandler，所以当我捕获到异常时我可以访问它。

Answer 1

我按照 tattarrattat and . According to MSDN 的建议通过将 ConnectRetryCount=0 添加到我的连接字符串中解决了这个问题，ConnectRetryCount 是

The number of reconnections attempted after identifying that there was an idle connection failure.

和

Set to 0 to disable reconnecting on idle connection failures

所以我的猜测是，通过将其设置为 0，SqlClient 不会尝试重新连接，而是 log4net 本身会尝试重新连接（因为我将 ReconnectOnError 属性设置为 true）。

log4net - 如何在连接断开后重新建立与数据库的连接

log4net - How to reestablish connection to database after connection has been broken

c#

sql-server