Plase HELP ! SQL ERROR =>> An I/O error occurred while receiving the TDS prelogin response.

Yes, the error message could stand to be more useful. I will make sure we address that.

But it looks like you've solved the problem though. By default, SQL Server listens for TCP connections on port 1433. Port 1434 is normally used by SQL Browser to respond to UDP queries to map a SQL Server instance name to IP address & port number.

Thank you for your feedback,

--David Olix

JDBC Development

ProgrammerJ,

I sincerely apologize for not responding to your question sooner. We do try our best to respond to all questions posted on this forum within two business days. In this case we did not. Indeed, the only reason I saw your post at all is that someone else followed up to it with a post about the same problem, which brought the thread back to the top of the list. However, I hope this has not dissuaded you from using the Microsoft SQL Server 2005 JDBC driver.

Again, my apologies, and thank you for your feedback,

--David Olix

JDBC Development

I have posted a similar problem on the jdbc discussion newsgroup. We are using the production 1.1 version of the JDBC driver. To repeat that post:

The stack trace is

Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Connection reset
at
com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown
Source)
at com.microsoft.sqlserver.jdbc.TDSWriter.flush(Unknown Source)
at com.microsoft.sqlserver.jdbc.TDSWriter.endRequest(Unknown Source)
at
com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(Unknown Source)
at
com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PreparedStatementExecutionRequest.executeStatement(Unknown Source)
at com.microsoft.sqlserver.jdbc.CancelableRequest.execute(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeRequest(Unknown
Source)
at
com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeQuery(Unknown
Source)

This is happening during a performance stress test, and only happens very
sporadically: two or three times during a multi-hour test of several
simultaneous users pounding on the database. There are no events on the DB
server, and nothing in the SQL Server 2005 log. The Tomcat server is running
on Linux. We are using a commons-DBCP connection pool that validates the
connection on borrow with "select 1", so we know the connection is good when
we get it for the pool. The network error happens right after a prepare
statement, so the connection is working, and then breaks on the execute of
the prepared statement. The query is not a long running query. We've also
checked the network health and it looks fine. We start some background batch
jobs against the server before the errors start to occur.

We are pretty much out of ideas. There are some relevant threads we can see
by Googling this, but neither IE nor Firefox can get the msdn.forums,
complaining the URL will never complete or something, which can be caused by
not accepting cookies, but that's not the problem.