Bug 208512 Classes in package org.eclipse.birt.data.engine.odaconsumer have multithreads issues
Classes in package org.eclipse.birt.data.engine.odaconsumer are not thread-safe.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/odaconsumer/ConnectionManager.java
driverHelper.setAppContext( appContext );
			
			IConnection connection = driverHelper.getConnection( dataSourceId );
			connection.open( connectionProperties );
			
			Connection ret = new Connection( connection, dataSourceElementId );
			
			getLogger().exiting( sm_className, methodName, ret );	
			return ret;
		}
		catch( OdaException ex )
		{
			getLogger().logp( Level.SEVERE, sm_className, methodName, 
							"Cannot open connection.", ex ); 
			
			throw new DataException( ResourceConstants.CANNOT_OPEN_CONNECTION, ex, 
			                         new Object[] { dataSourceElementId } );
		}
		catch( UnsupportedOperationException ex )
		{
			getLogger().logp( Level.SEVERE, sm_className, methodName, 
							"Cannot open connection.", ex ); 
			
			throw new DataException( ResourceConstants.CANNOT_OPEN_CONNECTION, ex, 
			                         new Object[] { dataSourceElementId } );
		}
	}
    /**
     * Adds default connection profile property provider service, if none
     * is already defined in the appContext object.