Toplink does not return the object sometimes - VeryHigh Volume application

Hi All,
Toplink version: 10.1.3.4, OAS 10.1.3.4, Oracle 10g, RedHat linux 4.0
We have a high volume application where toplink issues one of our queries like 25K times/hour.Query is a simple one querying the table based on the primary key(Id) that should return 1 object.
This query is not returning the object sometimes I should say like 200 times/hour. What bothers me is that the same query on the same Id(primary-key) returns the object another time.
I did enable the toplink logging level to FINE where I could see the SQL query getting issued to the DB, I was unsuccessful in changing the logging level to ALL to check if the object is getting returned by the toplink layer and being registered in the cache kind of details.
This is not easily re-producable as this only occurs in our Pre-Prod environment where we can simulate high volume. This completely baffles me and I am running out of ideas.
Thanks in advance.
-Ram
Edited by: Raam on Jun 4, 2009 7:41 PM

If you are configured for an isolated cache then there should be no concurrency issues. Each thread will query the database directly and load the object into the UnitOfWork. Is there an Exception handler configured on TopLink? Are you getting a timeout exception or some other exception that is being ignored?
--Gordon

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I also realize I'm not providing the type or package code, and that's because I think I'm good on that. The code above compiles just fine without errors and when it runs, it only returns 6 consecutive rows.. I'm expecting 70K lol. So I know I'm doing something wrong.
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Edited by: ErrolDC on Nov 14, 2011 4:52 PM
Edited by: ErrolDC on Nov 14, 2011 5:07 PM

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TRUNC (collect_start_time) <= v_mostrecentscandateThat probably has nothing to do with why you're only getting 6 rows.

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In the context of SiteStudio 10gR4:
I want to emulate a simple key-value-map using a static list. The purpose is enable authors to reference frequently-changed text-variables and maintain them in a single file.
When I attempt to use the ssIncludeXml function to place the value on a page, I get no result outputted. I have checked (using the XML-features in Oracle JDeveloper 11g) that the XPath actually evaluates to the expected value (FLAF_VAL_1). When I call the ssGetXmlNodeCount function with the same arguments, I get the result "0".
What am I doing wrong? Is there any limitations on the kinds of XPath expressions that ssIncludeXml will evaluate?
Thanks!
I use this snippet to include the value:
[!--$ ssIncludeXml("KEYVAL_TEST", "//wcm:element[@name='Key'][text()='FLAF_KEY_1']/../wcm:element[@name='Value']/node()") --]And this is my test file in the document KEYVAL_TEST:
<?xml version="1.0" encoding="UTF-8"?>
<wcm:root xmlns:wcm="http://www.stellent.com/wcm-data/ns/8.0.0" version="8.0.0.0">
<wcm:list name="KeyValuePairs">
    <wcm:row>
      <wcm:element name="Key">FLAF_KEY_1</wcm:element>
      <wcm:element name="Value">FLAF_VAL_1</wcm:element>
    </wcm:row>
    <wcm:row>
      <wcm:element name="Key">FLAF_KEY_2</wcm:element>
      <wcm:element name="Value">FLAF_VAL_2</wcm:element>
    </wcm:row>
</wcm:list>
</wcm:root>

Thank you for your reply!! It is great getting some helpful input to help me move forward on this issue!
2. What you are doing in the example is a bit simpler and not really sufficient to express the query, I need to perform.
I need to select the contents of a Value-element based on the value in corresponding Key-element in the row.
This can easily be formulated using XPath. I have already posted a few different XPath expressions that are equvalent for this XML-file. Each of the expressions works perfectly in JDeveloper when querying the XML-file, and yet fails in Site Studio.
The [Technical Reference|http://download.oracle.com/docs/cd/E10316_01/ouc.htm] states:
This script extension is a core Site Studio method that allows any element within managed XML file to be extracted and returned in an Idoc string variable, which be placed directly on a web page as an HTML snippet. The content of the XML node that is being extracted will be further evaluated in the scope of the current layout and therefore can include further server-side Idoc Script, if necessary.
The parameters are:
- dDocName of XML data file
- XPath expression (to identify a specific node or nodes of the XML data file)
Do you know what implementation of the XPath language is used in Site Studio?
Is it a subset of the language (the Technical Reference does not mention this at all)? Which subset?
Here is another XPath expression that works perfectly well in JDeveloper and fails in Site Studio:wcm:root/wcm:list/wcm:row[child::wcm:element[@name='Key']/text()[.='FLAF_KEY_1']]/wcm:element[@name='Value']/node()Any insights are appreciated! :-)

ExcuteQuery does not return the newly inserted row in the database

Jdeveloper Studio Edition Version 11.1.1.4.0
I have a use case where i insert a row in the database (without commit) and re-query the iterator to see the data in the jsf page. This was working file till we were using a directly the data control. Now our data control is inside a primary data control and it has stopped working. We don't see the inserted record in the page. Just to add that we are creating both the master and the detail record using the database procedure. Please helps us with a workaround or a solution and i have attached the code for reference.
    public void createSCAgr(ActionEvent actionEvent) {
          BindingContainer bindings = getBindings();
          OperationBinding operationBindingSC = bindings.getOperationBinding("createAgreement"); // this is calling a procedure to create record in the both master and detail table
          Object resultSC = operationBindingSC.execute();
          DCIteratorBinding iterator2 = ADFUtils.findIterator("PadForAgr1Iterator");
        iterator2.executeQuery();        // re-query the master record
          DCIteratorBinding iterator1 = ADFUtils.findIterator("FinForAgr1Iterator");
          iterator1.executeQuery(); // requery thedetail record
best regards
Sanjay Chatterji

Hi Timo,
Yes, I mean root application as the direct data control.
This has been working earlier and the difficult part is that it is still working fine for two of the screens. The screen in which it works are those which does not have master detail relationship in them.
We are using PL/SQL to create the new row as it involves using many database functions / packages to populate the base data for the freshly created row. which we use to get to the screen for further changes and commit.
We have been using this way for log time and it worked fine.
Sanjay Chatterji
Message was edited by: SChatterji

P_session.get_value call does not return the value

I have a form on a table.
After the doInsert call in the pl/sql event handler section of the insert button, I have the sql statement
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Any comments?
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null

When I user get_value_as_varchar2
function then i get following error
Anybody knows about solving a problem
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if i try to access varchar2 column then i get error.
An unexpected error occurred: ORA-06502: PL/SQL: numeric or value error (WWV-16016)
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(WWV-00000)
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null

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