Question

我在.net框架上运行nhibernate，在测试期间我收到此错误 ERROR 91 0 0 0发生异常：无法打开连接 NHibernate.ADOException：无法打开连接---＆gt; NHibernate.ADOException：无法从Driver ---＆gt;创建连接MySql.Data.My qlClient.MySqlException：＃08004Too许多连接

in MySql.Data.MySqlClient.PacketReader.CheckForError()
in MySql.Data.MySqlClient.PacketReader.ReadHeader()
in MySql.Data.MySqlClient.PacketReader.OpenPacket()
in MySql.Data.MySqlClient.NativeDriver.Authenticate411()
in MySql.Data.MySqlClient.NativeDriver.Authenticate()
in MySql.Data.MySqlClient.NativeDriver.Open()
in MySql.Data.MySqlClient.Driver.Create(MySqlConnectionString settings)
in MySql.Data.MySqlClient.MySqlPool.CreateNewPooledConnection()
in MySql.Data.MySqlClient.MySqlPool.GetPooledConnection()
in MySql.Data.MySqlClient.MySqlPool.GetConnection()
in MySql.Data.MySqlClient.MySqlPoolManager.GetConnection(MySqlConnectionString  settings)
in MySql.Data.MySqlClient.MySqlConnection.Open()
in NHibernate.Connection.DriverConnectionProvider.GetConnection()
--- Fine dell'analisi dello stack dell'eccezione interna ---
in NHibernate.Connection.DriverConnectionProvider.GetConnection()
in NHibernate.Impl.SessionFactoryImpl.OpenConnection()
--- Fine dell'analisi dello stack dell'eccezione interna ---
in NHibernate.Impl.SessionFactoryImpl.OpenConnection()
in NHibernate.Impl.SessionImpl.Connect()
in NHibernate.Impl.SessionImpl.get_Connection()
in NHibernate.Transaction.AdoTransaction.Begin(IsolationLevel isolationLevel)
in NHibernate.Transaction.TransactionFactory.BeginTransaction(ISessionImplementor  session, IsolationLevel isolationLevel)
in NHibernate.Transaction.TransactionFactory.BeginTransaction(ISessionImplementor  session)
in NHibernate.Impl.SessionImpl.BeginTransaction()
in interact.VideoSystem.Checks.CheckAviXml() in 
C:\var\projects\videosystem\3.0\VideoServiceSvc\Checks.vb:riga 348
ERROR 91 0 0 0  An exception occurred: cannot open connection
NHibernate.ADOException: cannot open connection ---> NHibernate.ADOException: Could not          create connection from Driver ---> MySql.Data.MyqlClient.MySqlException: #08004Too many connections

in MySql.Data.MySqlClient.PacketReader.CheckForError()
in MySql.Data.MySqlClient.PacketReader.ReadHeader()
in MySql.Data.MySqlClient.PacketReader.OpenPacket()
in MySql.Data.MySqlClient.NativeDriver.Authenticate411()
in MySql.Data.MySqlClient.NativeDriver.Authenticate()..........

我不知道如何解决它！有人能帮我吗' ？提前谢谢

Answer 1

MySQL有一个配置设置，用于确定可以为服务器创建多少个连接。很可能你跑过这个号码。

有关如何解决此问题的详细信息，请参阅以下链接：https://dev.mysql.com/doc/refman/5.5/en/too-many-connections.html。

如果您正在测试并收到此错误，则可能会遇到连接未关闭的问题。因此，我建议您在MySQL管理员甚至命令行中进行测试时查看MySQL连接，以确定是否正在关闭连接。听起来你正在泄漏关系。

快乐狩猎！

mysql与nhibernate连接太多

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