Inactive Sessions Getting Automatically Generated in Database

Question

I am facing a strange problem of getting huge number of inactive sessions getting generated th the database server which leads to it's connection closure.
The Error reads as "Failed to check out an Application due to connection failure of Application Module."
This happens each time I execute the following code:
String amDefName = "amendprgo.model.CSDInvFRCAmendPrgoServices";
String configName = "CSDInvFRCAmendPrgoServicesLocal";
ApplicationModule app1 = Configuration.createRootApplicationModule(amDefName,configName) ;
String voInstanceName="prgoHdrRO";
ViewObject prgoHdrROVO =app1.createViewObjectFromQueryStmt(voInstanceName,"select * from INV_PRGO_HDR");
prgoHdrROVO.setWhereClause("PRGO_ID="+tempRow.getAttribute("PrgoId")+" and DEPOT_CD = '0' and ITEM_CAT = 'I3' ");
prgoHdrROVO.executeQuery();
if(prgoHdrROVO.getEstimatedRowCount()>0){
return true;
I know there is a process of creating connection and View Object in Model part in JDeveloper, but I want to know why this problem happens.

Answer 1

ApplicationModule app1 = Configuration.createRootApplicationModule(amDefName,configName) ;is your problem as it causes at least one (sometimes more) connections to open. As you don't free the resource after using it the connection remains open even if you can't access it anymore.
You should call Configuration.releaseApplicationModule(...), with the application module you created before returning.
On the other side you shoulnd not even call createRootApplicationModule in the first place (as it causes trouble if you don't deeply know what the framework do with a root application module).
Can you tell us the use case which make you call createRootApplicationModule()? We might find a better solution.
Timo
Edited by: Timo Hahn on 19.05.2011 13:45
PS: something to read http://blogs.oracle.com/jdevotnharvest/entry/when_to_use_createrootapplicationmodule_in_oracle_adf and http://radio-weblogs.com/0118231/2009/08/20.html#a959