NPE deep within Toplink Stack

We are seeing NPE deep within Toplink stack as below, any ideas why this could happen?
java.lang.NullPointerException
at oracle.toplink.internal.databaseaccess.ParameterizedSQLBatchWritingMechanism.executeBatchedStatements(ParameterizedSQLBatchWritingMechanism.java:127)
at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:441)
at oracle.toplink.publicinterface.Session.executeCall(Session.java:728)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:117)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:103)
at oracle.toplink.internal.queryframework.DatasourceCallQueryMechanism.selectOneRow(DatasourceCallQueryMechanism.java:501)
at oracle.toplink.internal.queryframework.ExpressionQueryMechanism.selectOneRowFromTable(ExpressionQueryMechanism.java:872)
at oracle.toplink.internal.queryframework.ExpressionQueryMechanism.selectOneRow(ExpressionQueryMechanism.java:847)
at oracle.toplink.queryframework.ReadObjectQuery.executeObjectLevelReadQuery(ReadObjectQuery.java:415)
at oracle.toplink.queryframework.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:812)
at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:620)
at oracle.toplink.queryframework.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:780)
at oracle.toplink.queryframework.ReadObjectQuery.execute(ReadObjectQuery.java:388)
at oracle.toplink.queryframework.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:841)
at oracle.toplink.publicinterface.UnitOfWork.internalExecuteQuery(UnitOfWork.java:2631)
at oracle.toplink.publicinterface.Session.executeQuery(Session.java:993)
at oracle.toplink.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:62)
at oracle.toplink.internal.indirection.QueryBasedValueHolder.instantiateForUnitOfWorkValueHolder(QueryBasedValueHolder.java:77)
at oracle.toplink.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:143)
at oracle.toplink.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:217)
at oracle.toplink.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:61)
at com.integral.finance.dealing.RequestC.getParentRequest(RequestC.java:803)
at com.integral.is.management.monitor.TradeMonitorMessageBuilderC.addCustomFieldstoTradeObject(TradeMonitorMessageBuilderC.java:327)
at com.integral.is.management.monitor.TradeMonitorMessageBuilderC.createTradeMessage(TradeMonitorMessageBuilderC.java:181)
at com.integral.is.management.monitor.TradeMonitorMessageDispatcher.run(TradeMonitorMessageDispatcher.java:63)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)
at java.lang.Thread.run(Thread.java:595)

That is odd. What are you doing to get this error? Are multiple threads running? Are you by chance using a DatabaseSession concurrently? In general it it recommended to use a ServerSession in a multiple thread application.
James : http://www.eclipselink.org

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Sorting of images within a stack

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Chris Reed wrote:
With the help of Ben (see http://forums.ni.com/t5/LabVIEW/Determine-cluster-element-clicked-in-mouse-down-event/td-p/1245770)
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I just wanted to use one "Main Cluster":Mouse Down event and from that determine which of the sub-sub clusters had been clicked on - is this even remotely possible?
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Ben Rayner
I am currently active on.. MainStream Preppers
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Attachments:
Stack Plot Fill Baseline.vi ‏12 KB

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C++ stack overflow on desctruction of Set::View

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Cheers
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Edited by: user9929344 on 22-Oct-2008 01:57

Hi Rich,
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Maybe a silly question, but I can't find out how to put a single item from a stack into an album. When I drag a stacked item to an album, the entire stack appears in the album. This is not what I want, I want to get the single item in the album.
I know I can make a single stacked item in an album to be the albumpick. But this is not enough. Sometimes I need to put two items from the same stack into this album.
Koen
Message was edited by: Koen van Dijken

Koen van Dijken wrote:
Would this be as designed, and so a wrong use of stacks by me?
It is as designed but I don't think what you want to do is a particularly wrong use of stacks. I can see using stacks as a way to reduce clutter in the browser but still wanting to be able to get to individual images in the stack to use..
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Dragging Stacks
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(emphasis added)
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And in way you can do this, the only thing is what you end up doing is unstacking the image you drag out. Not exactly what you would want to do.
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http://ontoplink.blogspot.com/2007/01/accessing-session-in-toplink-essentials.html
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(Oracle TopLink Essentials - 2.0 (Build b41-beta2 (03/30/2007))): oracle.toplink.essentials.exceptions.ValidationException
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I managed to generate this only partly by using stacked item groups for each tab-canvas and item groups within these stacked item groups. But the item groups are all placed beneath each other! I can not find a way to control the layout-generation. It looks like the forms-generator does not use the tabulation preferences.
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FOUND THE COMMON DENOMINATOR!!!
"The built-in 5-star rating smart album does not work as it cannot find rated images inside stacks."
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