Connection Leak Exception in farm runs

Question

Hi
I am trying to use the ADFBC to get a list of values for my backend data which will be displayed in the UI later. In the view, it works fine. There have been no errors. But during the farm runs there is an intermittent issue of the Connection Leak Exception.
Array has 121
######################################### START
2010-11-06 21:37:38,194 [[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'] DEBUG jdbc.leak checkLeakedConnections.267 -
java.lang.Exception: Connection Leak Exception
     at oracle.sysman.util.jdbc.DefaultConnectionListener.connectionOpened(DefaultConnectionListener.java:168)
     at oracle.sysman.util.jdbc.ConnectionListenerManagerImpl.processConnectionEvent(ConnectionListenerManagerImpl.java:112)
     at oracle.sysman.util.jdbc.ConnectionCache.processConnectionEvent(ConnectionCache.java:471)
     at oracle.sysman.util.jdbc.ConnectionWrapper._fireOpenedEvent(ConnectionWrapper.java:1805)
     at oracle.sysman.util.jdbc.ConnectionWrapper.<init>(ConnectionWrapper.java:219)
     at oracle.sysman.emSDK.svc.conn.FGAConnection.<init>(FGAConnection.java:151)
     at oracle.sysman.emSDK.svc.conn.FGAConnectionCache.getFGAConnection(FGAConnectionCache.java:330)
     at oracle.sysman.emSDK.svc.conn.ConnectionService.getPrivateConnection(ConnectionService.java:1798)
     at oracle.sysman.emSDK.svc.conn.EMReposConnectionDataSource.getConnection(EMReposConnectionDataSource.java:63)
     at oracle.jbo.server.DBTransactionImpl.establishNewConnection(DBTransactionImpl.java:939)
     at oracle.jbo.server.DBTransactionImpl.initTransaction(DBTransactionImpl.java:1112)
     at oracle.jbo.server.DBTransactionImpl.initTxn(DBTransactionImpl.java:6372)
     at oracle.jbo.server.DBTransactionImpl2.connectToDataSource(DBTransactionImpl2.java:286)
     at oracle.jbo.server.DBTransactionImpl2.connectToDataSource(DBTransactionImpl2.java:309)
     at oracle.jbo.common.ampool.DefaultConnectionStrategy.connect(DefaultConnectionStrategy.java:203)
     at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolConnect(ApplicationPoolMessageHandler.java:562)
     at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolMessage(ApplicationPoolMessageHandler.java:410)
     at oracle.jbo.server.ApplicationModuleImpl.doPoolMessage(ApplicationModuleImpl.java:8651)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.sendPoolMessage(ApplicationPoolImpl.java:4405)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.prepareApplicationModule(ApplicationPoolImpl.java:2391)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.doCheckout(ApplicationPoolImpl.java:2203)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.useApplicationModule(ApplicationPoolImpl.java:3101)
     at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:460)
     at oracle.jbo.http.HttpSessionCookieImpl.useApplicationModule(HttpSessionCookieImpl.java:234)
     at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:431)
     at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:426)
     at oracle.adf.model.bc4j.DCJboDataControl.initializeApplicationModule(DCJboDataControl.java:512)
     at oracle.adf.model.bc4j.DCJboDataControl.getApplicationModule(DCJboDataControl.java:855)
     at oracle.adf.model.binding.DCDataControl.setErrorHandler(DCDataControl.java:476)
     at oracle.jbo.uicli.binding.JUApplication.setErrorHandler(JUApplication.java:261)
     at oracle.adf.model.BindingContext.put(BindingContext.java:1271)
     at oracle.adf.model.binding.DCDataControlReference.getDataControl(DCDataControlReference.java:173)
     at oracle.adf.model.BindingContext.instantiateDataControl(BindingContext.java:1005)
     at oracle.adf.model.dcframe.DataControlFrameImpl.doFindDataControl(DataControlFrameImpl.java:1219)
     at oracle.adf.model.dcframe.DataControlFrameImpl.internalFindDataControl(DataControlFrameImpl.java:1122)
     at oracle.adf.model.dcframe.DataControlFrameImpl.findDataControl(DataControlFrameImpl.java:1082)
     at oracle.adf.model.BindingContext.internalFindDataControl(BindingContext.java:1126)
     at oracle.adf.model.BindingContext.get(BindingContext.java:1083)
     at oracle.adf.model.binding.DCParameter.evaluateValue(DCParameter.java:82)
     at oracle.adf.model.binding.DCParameter.getValue(DCParameter.java:111)
     at oracle.adf.model.binding.DCBindingContainer.getChildByName(DCBindingContainer.java:2682)
     at oracle.adf.model.binding.DCBindingContainer.internalGet(DCBindingContainer.java:2730)
     at oracle.adf.model.binding.DCExecutableBinding.get(DCExecutableBinding.java:115)
     at oracle.adf.model.binding.DCUtil.findSpelObject(DCUtil.java:305)
     at oracle.adf.model.binding.DCBindingContainer.evaluateParameterWithElCheck(DCBindingContainer.java:1456)
     at oracle.adf.model.binding.DCBindingContainer.findDataControl(DCBindingContainer.java:1564)
     at oracle.adf.model.binding.DCIteratorBinding.initDataControl(DCIteratorBinding.java:2433)
     at oracle.adf.model.binding.DCIteratorBinding.getDataControl(DCIteratorBinding.java:2378)
     at oracle.adf.model.binding.DCIteratorBinding.refresh(DCIteratorBinding.java:4270)
     at oracle.adf.model.binding.DCExecutableBinding.refreshIfNeeded(DCExecutableBinding.java:341)
     at oracle.adf.model.binding.DCIteratorBinding.getAllRowsInRange(DCIteratorBinding.java:2306)
     at oracle.adf.model.binding.DCControlBinding.getAllRowsInRange(DCControlBinding.java:447)
     at oracle.sysman.db.provisioning.ui.pagemodel.common.tgtsel.DbProvisioningTgtSelPageModel.updateCollectionMap(DbProvisioningTgtSelPageModel.java:214)
Any inputs on this.
Thanks in advance
Regards
Rama

Answer 1

A Few more updates to this issue
public static Object resolveExpression(String expression) {
FacesContext facesContext = FacesContext.getCurrentInstance();
Application app = facesContext.getApplication();
ExpressionFactory elFactory = app.getExpressionFactory();
ELContext elContext = facesContext.getELContext();
ValueExpression valueExp =
elFactory.createValueExpression(elContext, expression,
Object.class);
return valueExp.getValue(elContext);
CollectionModel model= (CollectionModel) resolveExpression("#{bindings.DbProvCurrentSnapshotVOInst.collectionModel}");
if(null!=model) {
JUCtrlHierBinding treeBinding = (JUCtrlHierBinding) model.getWrappedData();
if(null!=treeBinding) {
Row[] r = treeBinding.getAllRowsInRange();
if(null!=r) {
for(Row r1:r) {
collectionTimeMap.put((String)r1.getAttribute(TARGET_NAME_ATTR),.....)));
The region's pagedef has the following entry
<?xml version="1.0" encoding="UTF-8" ?>
<pageDefinition xmlns="http://xmlns.oracle.com/adfm/uimodel"
version="11.1.1.55.49" id="targetselectionPageDef"
Package="db.provisioning.common.tgtsel">
<parameters/>
<executables>
<variableIterator id="variables"/>
<iterator id="DbProvCurrentSnapshotVOInstIterator"
Binds="DbProvCurrentSnapshotVOInst"
DataControl="DbProvAMDataControl" RangeSize="25"/>
</executables>
<bindings>
<tree IterBinding="DbProvCurrentSnapshotVOInstIterator"
id="DbProvCurrentSnapshotVOInst">
<nodeDefinition DefName="oracle.sysman.db.provisioning.model.view.DbProvCurrentSnapshotVO"
Name="DbProvCurrentSnapshotVOInst0">
<AttrNames>
<Item Value="TargetName"/>
<Item Value="StartTimestamp"/>
</AttrNames>
</nodeDefinition>
</tree>
</bindings>
</pageDefinition>
Application Module
<AppModule
xmlns="http://xmlns.oracle.com/bc4j"
Name="DbProvAM"
Version="11.1.1.56.77"
ComponentClass="oracle.sysman.db.provisioning.model.applicationModule.DbProvAMImpl"
DefClass="oracle.sysman.db.provisioning.model.applicationModule.DbProvAMDefImpl"
ClearCacheOnRollback="true">
<DesignTime>
<Attr Name="_deployType" Value="0"/>
<Attr Name="_isDefCodegen" Value="true"/>
<Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<ViewUsage
Name="DbProvCurrentSnapshotVOInst"
ViewObjectName="oracle.sysman.db.provisioning.model.view.DbProvCurrentSnapshotVO"/>
</AppModule>
bc4j entry
<?xml version = '1.0' encoding = 'UTF-8'?>
<BC4JConfig version="11.1" xmlns="http://xmlns.oracle.com/bc4j/configuration">
<AppModuleConfigBag ApplicationName="oracle.sysman.db.provisioning.model.applicationModule.DbProvAM">
<AppModuleConfig DeployPlatform="LOCAL" jbo.project="oracle.sysman.db.provisioning.model.DbProvisioningModel" name="DbProvAMLocal" ApplicationName="oracle.sysman.db.provisioning.model.applicationModule.DbProvAM">
<Database jbo.TypeMapEntries="Java" jbo.locking.mode="optimistic"/>
<Security AppModuleJndiName="oracle.sysman.db.provisioning.model.applicationModule.DbProvAM"/>
<Custom JDBCDataSource="java:comp/env/jdbc/EMReposDS"/>
</AppModuleConfig>
<AppModuleConfig DeployPlatform="LOCAL" jbo.project="oracle.sysman.db.provisioning.model.DbProvisioningModel" name="DbProvAMShared" ApplicationName="oracle.sysman.db.provisioning.model.applicationModule.DbProvAM">
<AM-Pooling jbo.ampool.dynamicjdbccredentials="false" jbo.ampool.isuseexclusive="false" jbo.ampool.maxpoolsize="1" jbo.ampool.resetnontransactionalstate="false"/>
<Database jbo.TypeMapEntries="Java" jbo.locking.mode="optimistic"/>
<Security AppModuleJndiName="oracle.sysman.db.provisioning.model.applicationModule.DbProvAM"/>
<Custom JDBCDataSource="java:comp/env/jdbc/EMReposDS"/>
</AppModuleConfig>
</AppModuleConfigBag>
</BC4JConfig>
The scenario is that I launch a page which has a region. This region needs to get a list of values from the backend. These values are coming from a VO.
This issue happens only in the farms and I guess at times from the view, but doing a bounce of the server resolves the issue.
Is there any setting that needs to be done ?
Thanks
Regards
Rama