Hibernate version: 3.0

Name and version of the database you are using: Firebird v. 1.5.2

Hello.

My application blocks after severel runs. I don't know why. The log4j output for hibernate (debug level) is:
14:03:53,515 DEBUG SessionImpl: iterate:
FROM DailyTimetable d
ORDER BY d.dataCurenta DESC

14:03:53,515 DEBUG QueryParameters: named parameters: {}
14:03:53,515 DEBUG QueryTranslatorImpl: compile() : The query is already compiled, skipping...
14:03:53,515 DEBUG AbstractBatcher: about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
14:03:53,515 DEBUG AbstractBatcher: opening JDBC connection.

What's the cause for my problem?

Thanks!

I have debug HIbernate and I identified the line with problem - is the first line in this method - ds.getConnection():

public Connection getConnection() throws SQLException {
final Connection c = ds.getConnection();
if (isolation!=null) c.setTransactionIsolation( isolation.intValue() );
if ( c.getAutoCommit()!=autocommit ) c.setAutoCommit(autocommit);
return c;
}