A connection was successfully established with the server, but then an error occurred during the pre-login handshake

Solution 1) Clean your VS.Net Solution 2) Rebuild Project. 3) Reset IIS 4) Run the project again. Basically that solved my problem, but in my case i was not getting this error and suddenly my local environment starts giving me above error, so may be that trick work for me.

How do I find out my MySQL URL, host, port and username?

If you’re already logged into the command line client try this: mysql> select user(); It will output something similar to this: +—————-+ | user() | +—————-+ | root@localhost | +—————-+ 1 row in set (0.41 sec) In my example above, I was logged in as root from localhost. To find port number and other interesting … Read more

What does “exec sp_reset_connection” mean in Sql Server Profiler? [duplicate]

Like the other answers said, sp_reset_connection indicates that connection pool is being reused. Be aware of one particular consequence! Jimmy Mays’ MSDN Blog said: sp_reset_connection does NOT reset the transaction isolation level to the server default from the previous connection’s setting. UPDATE: Starting with SQL 2014, for client drivers with TDS version 7.3 or higher, … Read more

What is database pooling?

Database connection pooling is a method used to keep database connections open so they can be reused by others. Typically, opening a database connection is an expensive operation, especially if the database is remote. You have to open up network sessions, authenticate, have authorisation checked, and so on. Pooling keeps the connections active so that, … Read more

How does spring.jpa.hibernate.ddl-auto property exactly work in Spring?

For the record, the spring.jpa.hibernate.ddl-auto property is Spring Data JPA specific and is their way to specify a value that will eventually be passed to Hibernate under the property it knows, hibernate.hbm2ddl.auto. The values create, create-drop, validate, and update basically influence how the schema tool management will manipulate the database schema at startup. For example, … Read more

How to connect to SQL Server database from JavaScript in the browser?

You shouldn´t use client javascript to access databases for several reasons (bad practice, security issues, etc) but if you really want to do this, here is an example: var connection = new ActiveXObject(“ADODB.Connection”) ; var connectionstring=”Data Source=<server>;Initial Catalog=<catalog>;User ID=<user>;Password=<password>;Provider=SQLOLEDB”; connection.Open(connectionstring); var rs = new ActiveXObject(“ADODB.Recordset”); rs.Open(“SELECT * FROM table”, connection); rs.MoveFirst while(!rs.eof) { document.write(rs.fields(1)); rs.movenext; … Read more

PG::ConnectionBad – could not connect to server: Connection refused

It could be as simple as a stale PID file. It could be failing silently because your computer didn’t complete the shutdown process completely which means postgres didn’t delete the PID (process id) file. The PID file is used by postgres to make sure only one instance of the server is running at a time. … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)