BUG: Multiple threads Cause Connection Busy Error in the Driver

ID: Q175904

The information in this article applies to:

Microsoft SQL Server version 6.5
Microsoft Open Database Connectivity, versions 2.5, 3.0

BUG #: 17322 (6.50)

SYMPTOMS

Multiple threads, each allocating its own HSTMT using server cursors (active statements) sharing a single connection, cause the following error on prepared execution of a SQL statement:

S1000: [Microsoft][ODBC SQL Server Driver] Connection is busy with results for another hstmt

WORKAROUND

To work around this problem, use SQLExecDirect statements instead of SQLPrepare and SQLExecute when using multiple active HSTMTs (on different threads) and server cursors.

STATUS

Microsoft has confirmed this to be a problem in SQL Server version 6.5 and Open Database Connectivity version 3.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: timing multi-threaded

Keywords : kbinterop ODBCGen SSrvGen kbbug6.50 kbbug2.50
Version : WINDOWS:2.5,3.0; winnt:6.5
Platform : WINDOWS winnt
Issue type : kbbug