Description shah.amar 2010-11-17 16:33:02 EST

Build Identifier: Eclipse Helios 20100917-0705

Build Identifier: Birt 2.6.1 GA

While testing our reports with Birt 2.6.1 we found that reports that uses dynamic list parameter sees connection leak once deployed on server and accessed through Birt Engine/Viewer API.

We user BIRT Engine API IGetParameterDefinitionTask to retrieve param definition and display it on our own UI. Once custom params screen is shown, user selects params values and submit for report. Report is again generated using BIRT Engine API RunTask & RunAndRenderTask.

We see connection leak each time the report with dynamic parameter is loaded to show its custom parameter input page.

Reproducible: Always

Reproducible: Always

Steps to Reproduce:
To demonstrate and debug issue, I have attached a simple report with connection to oracle, one data set, and one dynamic parameter using data set to fetch value from database. 
Below is the sample table used for this report
CREATE TABLE TEST_DATA
(
  ID    NUMBER,
  DATA  VARCHAR2(100 BYTE)                      NOT NULL
)

Insert into TEST_DATA (ID, DATA) Values (1, 'row_1');
Insert into TEST_DATA (ID, DATA) Values (2, 'row_2');
Insert into TEST_DATA (ID, DATA) Values (3, 'row_3');
COMMIT;

Deploy this report on server side birt viewer. Access the parameter defination of this report using IGetParameterDefinitionTask 
//Code snippet to fetch parameter definations
IGetParameterDefinitionTask task = this.birtEngine
					.createGetParameterDefinitionTask(rptDesign);
Collection params = task.getParameterDefns(true);

Each time the reports parameter definitions are loaded, there is connection opened to DB which is not released.

Keep watching oracless session using below query
SELECT COUNT(*) FROM v$session