我在我的WebAPI应用程序中使用log4net的AdoNetAppender.每隔几周,记录器突然停止记录,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) { } }
,这些是我得到的消息和例外:
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,但它没有使它重新连接.
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,所以当我捕获异常时我可以访问它. 我通过在 tattarrattat和 https://stackoverflow.com/a/38333737/5850144建议的连接字符串中添加ConnectRetryCount = 0来解决这个问题.根据 MSDN,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,通过将此设置为0,SqlClient将不会尝试重新连接,而是log4net本身将尝试重新连接(因为我将ReconnectOnError属性设置为true).
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