APEX 4 Session State dialog sticks with wrong session

Hi,
when an application user login into the application (custom auth scheme via table) APEX changes session as expected.
But Session State dialog shows state for the previous session that corresponds the developer session number.

Bug 9855165 INCORRECT RESULTS WHEN VIEWING SESSION STATE FROM DEVELOPER TOOLBAR

Similar Messages

Adding Set of Session Beans generates client with wrong session bean names

Hi,
I am trying to import a set of session beans deployed on Sun Java Sever 8.2 using Netbeans 6.0. on windows XP.
The problem is that the imported set generated by the IDE has wrong session bean names and out of 8 session beans in the client jar only 6 are shown (and different 6 every time). Also the remote methods of one bean are associated with another bean and every time its a different set of bean clients generated.
I am really perplexed with this behavior. Any help on this issue will be highly appreciated.

An RMI/IIOP parameter type must meet one of thefollowing criteria:
It must be a primitive type, or it must implementeither java.rmi.Remote or java.io.Serializable,
or it must be an interface for which the runtime typesatisfies the previous criteria,
or it must be an array containing elements thatsatisfy the previous criteria.This tells you exactly what you need to do.

Model session not in sync with Http Session

Hi All,
I have an application developed in JDev 11.1.1.4 and we are not using ADF Security for login.
The problem occurring is randomly some of the LOV on my home page are getting null (having no data). These LOVs are populated using the values passed as bind parameter from the login values (basically HTTP session values at web layer). So i added a method in all the task flow to set the session value at the model layer (default method) . Also on each call to the Am Impl call i am setting the value in the HTTP session and then invoking the method, but some how what happens is the Model level session value is not in sync with HTTP session and the list gets empty.
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thnk

In this case you need to overwrite the activateState/passivateState method of your am and store/reads the values from the xml structure you get as parameters to this methods.
For more detailed information check the docs http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/bcstatemgmt.htm#sm0495
By the way, this is nothing you need to open an SR on as it's working as designed.
Timo

Session State Protectio Violoation in Apex 4.2 Page Items

I'm testing my Apps that I upgraded from 3.2 to 4.2 and getting the message below and haven't been able to understand why.
Error Session state protection violation: This may be caused by manual alteration of protected page item P2_PAY_NO. If you are unsure what caused this error, please contact the application administrator for assistance
How the Page works.
1. Before Region Process runs that pre-populates some of my Text Items.
2. The user then has the ablibity to select from a select list item that will re-populate the items populated during the Before reqion based on the date selected.
I do this by calling the code below with an "onchange="javascript:date_populate(this);" on the HTML Form Elements Attributes.
{var myString = $x(pThis).value;
var mySplitResult = myString.split("|");
$x('P2_START_DATE').value = mySplitResult[0];
$x('P2_PAY_YEAR').value = mySplitResult[1];
$x('P2_PAY_NO').value = mySplitResult[2];
$x('P2_PICT_CODE').value = mySplitResult[3];
$x('P2_END_DATE').value = mySplitResult[4];}
3. When I submit the page I get the Session State Violation.
All Items have "Session State Proection" set to "Unrestricted"
Session State Protection is "Disabled" for the application.
Edited by: spuchc on Apr 12, 2013 2:07 PM

Check you are not updating items of type "Display Only".
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.apress.com/9781430235125
http://apex.oracle.com/pls/apex/f?p=31517:1
http://www.amazon.de/Oracle-APEX-XE-Praxis/dp/3826655494
-------------------------------------------------------------------

Session State Replication of Referenced Objects

Here is question on Clustering and Session state replication:
          Scenario:
          Consider two Session Objects A and B.
          Object A has-a reference to object B.
          So whatever changes done to Object B is reflected in Object A.
          In-memory Session replication happens on every HttpSession.setAttribute() call.
          The question is will the two session objects(A and B) be replicated to the other cluster and will still maintain the reference relationship or will they be two separate objects with same data (in different memory locations).
          regards,
          Jaiganesh

Ok, I have been meaning to dig into session replication in a bit more detail and your question is a good excuse to do it!
          First stop the docs:
          Bea Docs
          The bits that jump out are under:
          Programming Considerations for Clustered Servlets and JSPs
          1) Session Data Must Be Serializable, so both your objects are serializable.
          2) Use setAttribute to Change Session State In an HTTP servlet that implements javax.servlet.http.HttpSession, use HttpSession.setAttribute (which replaces the deprecated putValue) to change attributes in a session object. If you set attributes in a session object with setAttribute, the object and its attributes are replicated in a cluster using in-memory replication. If you use other set methods to change objects within a session, WebLogic Server does not replicate those changes. Every time a change is made to an object that is in the session, setAttribute() should be called to update that object across the cluster.
          Likewise, use removeAttribute (which, in turn, replaces the deprecated removeValue) to remove an attribute from a session object.
          >Will the reference as shown in the step 3 will be >maintained after replication on the other cluster ?? I >guess not!!
          I don't understand "on the other cluster" There is normally one cluster made up of a few servers. The session state is maintained on one primary server and a secondary server. So you have aObj.a2 = bObj, from the docs I would understand that at the momment you called session.setAttribute the aObj and all its fields provided they are seriliazable will be replicated in Mememory.
          >There the aObj and bObj stored in the two different >session objects will not have a reference relationship >in other words if i change bObj on the other cluster >will the reference a2 of aObj be able see it ??
          This is testing the limits of my understanding, but would have thought if the objects are in different sessions they should not be able to reference each other in the manner I think you are suggesting, so if I access aObj.a2 (an instance of bObj) and changed it in one session it should not affet any other bObj unless bObj is a singleton....I think!
          What say you?

Saving session state

Hi Everyone!
We are looking for an easy-to-use solution for saving the session state in whole.
(We are aware that it is possible to save the sesion state for a single item.)
Our goal is to get a single commando which restores an whole session to another session. We would like to be able to save a session, purge the session (because of old age) and restore it's session state again to a new session.
any ideas?

Hi,
I was thinking that a pointer to the Session object could be stored in a database on the initial loginAre you by any chance referring to the pointer similar to the one that is used in C? If so I guess it is not available in java.
One possible solution where you can persist data across sessions is by the use of stateful session beans. Also you could experiment with the different scopes of the object for achieving your goal.
I hope this helps you. In case I have missed out something please do post again.
Cheers
Giri :-)
Creator Team

What changes was made in ApEx 3.0 with DB session.

How to create a new DB session for each user?
Best Regards, Kostya Proskudin

Kostya,
With the mod_plsql session pooling you should always assume that you will not get the same session you used last time, i.e. it is far 'safer' to assume you have a different session than assuming you will get the same one.
Application Express and mod_plsql handle all of that side of things for you with respect to the APEX session environment, in other words even if you get a different database session from the pool of sessions then the the APEX session state information will still be the same for the same APEX user.
If it's true why I have the same data in temporary table in each computer in my office?
It was in ApEx 2.2 but in ApEx 3.0 something changed. An anomaly, you could run that test 999,999 times and get the same data in the temporary table and then the 1,000,000 time you run it you might see the 'wrong' information.
As Joel and I have already said, temporary tables are not suitable for using in this way. The conclusions you are drawing from your test are (in my opinion) incorrect.

Session state consistency - how does APEX keep session state across pages

I would like to know how the APEX develper tool keeps session state from being overwritten across mutiltple pages in the same Session. Because this is difficult to explain I'll use an example from withing the APEX dev tool
For Example:
1. I navigate to the page (4150) thet allows me to edit my Page 880 [Window 1]
2. I now do a Cntrl^N to Open a New Window in the same session (this opens on the same Page 880 in the new window) [Window 2].
3. In Window 1, I click an item to update ie I want to put a comment on the Unconditional Branch so click this to go to the Update page. I see the F4000_P4313_ID is passed in the URL (ie the context, UID of the Branch).
4. In Window 2, I change the page to 881 - ie this is overwriting my Session State variables for page 880 with page 881.
5. I click an item in Page 881 to update ie I want to put a comment on the Unconditional Branch so click this to go to the Update page. I see the F4000_P4313_ID is passed in the URL (ie the context, teh UID of the Branch).
6. In Window 1 (the Page 880), I add a comment to the Branch and 'Apply' changes. On returning to the Page the context has changed from 880 to 881 (as expected as Window 2 had overwritten the session state). Slightly confusing for the user as they did go from Page 880 not 881 but ok
What intrigues me is how the Edit Branch page applied the update to the correct branch [good !]. Why weren't the Branch Session state variables (ie the Branch for Page 880) overwritten with the Branch Session state variables for the Branch from Page 881 ?
Both navigations go to the same Page passing the UID of the branch, hence I would of thought the last navigation is the one that would be persisting (ie from Page 881 Window) ?
Any tips on preventing users updating the wrong record because of the Session State being overwritten would be most welcome.
Look forward to hearing from you.

Let me take a shot at explaining this.
Session state is stored in Oracle database tables. When a APEX page is rendered, those tables are read and the HTML is sent to the browser. When that page is submitted, all the HTML form inputs on the page are saved back into session state over-writing any existing values for that session
So, in your example, since Page 4313 has the hidden page item (the "GUID" of the branch), it doesn't matter if any other window has the same page open with some other GUID. Each page is a self-contained "unit" which has all the information necessary to properly process that page when it is submitted.
Think of it this way...in your example, when you have windows 1 and 2 open (window 2 was opened after window 1), go back to Window 1 and click the browser's Reload/Refresh button. Instead of refreshing the same page (branch 9000000), you will find that it will load branch 8000000! This is because session state is read from the database and when Window 2 was rendered, it has set F4000_P4313_ID in session state to 8000000.
Hope this helps.

Set Session State with Shuttle items

Is it possible to have session state set with each item selected in a shuttle? You have a shuttle with 4 possible options, you select item 2 from the left portion of shuttle and it is moved to the right.. Can you set the session state at that point?
What I am trying to do is take the session state after change in the control and use it to populate a text field below. The returned values are used in a sql select to populate the text box with a looked up value...
Thank you,
Tony Miller
Ruckersville, VA

TexasApexDeveloper wrote:
Won't this just push the last items value in, as apposed to appending the value?
Tony,
No. Because for shuttle items the return value is stored as colon delimited string.
Means after each change you will have a colon delimited string in the session state with selected values(moved to right).
See this http://apex.oracle.com/pls/apex/f?p=46417:47

Corrupt Session State? - Apex form posts text value as Null

Recently I've discovered an issue with our Apex installation in which any value chosen as a source for a text field ends up being posted as a null to the database.
We are running APEX version 3.2 within an Oracle 10.2.0.4 database using the Oracle HTTP Server from the 10g companion disk.
At first glance, everything appears to function as expected; I have created a simple table called "oracle_sr" with 2 columns both not null:
SQL> desc capacity.oracle_sr
Name Null? Type
ORACLE_SR_ID NOT NULL NUMBER
TIMESTAMP NOT NULL DATE
Within APEX the form wizard was used to create a form on this table.
After executing the pages and entering a value for the timestamp field I can create records without issue.
The issue arises when I choose a source value for the timestamp field.
Any of the source options result in the same error (including a static value) so I will focus on the SQL Query for the source as:
select sysdate from dual;
This should substitute the system date within the timestamp text field when the page is executed.
As expected, the value appears in the text box but when I submit the form to create the record I receive the error:
ORA-01400: cannot insert NULL into ("CAPACITY"."ORACLE_SR"."TIMESTAMP")
I have been working with APEX for quite some time and have successfully used this technique in many applications but just started to see this error over the past few days. What is particularly odd about this message is that default "not null" validations created by the form wizard sees the timestamp filed as having a value. The session state information included below is reporting a value yet the database is throwing the ORA-01400.
Has anyone experienced a similar issue? I've spent a fair amount of time trying to research this issue but cannot seem to find any similar posts.
I have included the debug output from my test page, from what I can see, there does seem to be a value associated with the timestamp filed:
0.00: A C C E P T: Request="CREATE"
0.00: Metadata: Fetch application definition and shortcuts
0.00: NLS: wwv_flow.g_flow_language_derived_from=FLOW_PRIMARY_LANGUAGE: wwv_flow.g_browser_language=en-us
0.00: alter session set nls_language="AMERICAN"
0.00: alter session set nls_territory="AMERICA"
0.00: NLS: CSV charset=WE8MSWIN1252
0.00: ...NLS: Set Decimal separator="."
0.00: ...NLS: Set NLS Group separator=","
0.00: ...NLS: Set date format="DD-MON-RR"
0.01: ...Setting session time_zone to -06:00
0.01: Setting NLS_DATE_FORMAT to application date format: DD-MON-RR
0.01: ...NLS: Set date format="DD-MON-RR"
0.01: Fetch session state from database
0.01: ...Check session 2303701116904676 owner
0.01: Setting NLS_DATE_FORMAT to application date format: DD-MON-RR
0.02: ...NLS: Set date format="DD-MON-RR"
0.02: ...Check for session expiration:
0.02: ...Metadata: Fetch Page, Computation, Process, and Branch
0.02: Session: Fetch session header information
0.02: ...Metadata: Fetch page attributes for application 109, page 50
0.02: ...Validate item page affinity.
0.02: ...Validate hidden_protected items.
0.03: ...Check authorization security schemes
0.03: Session State: Save form items and p_arg_values
0.03: *...Session State: Save Item "P50_ORACLE_SR_ID" newValue="" "escape_on_input="N"*0.03: *...Session State: Save Item "P50_TIMESTAMP" newValue="26-MAY-09" "escape_on_input="N"*
0.03: ...Session State: Save "P0_CURRENT_PERSONNEL_ID" - saving same value: "1"
0.03: ...Session State: Save "P0_OFFSET" - saving same value: "0"
0.03: ...Session State: Save "P0_ACTIVE_WEEK" - saving same value: "24-MAY-09"
0.03: Processing point: ON_SUBMIT_BEFORE_COMPUTATION
0.03: Branch point: BEFORE_COMPUTATION
0.03: Computation point: AFTER_SUBMIT
0.03: Tabs: Perform Branching for Tab Requests
0.03: Branch point: BEFORE_VALIDATION
0.03: Perform validations:
0.03: ...Item Not Null Validation: P50_TIMESTAMP
0.04: Branch point: BEFORE_PROCESSING
0.04: Processing point: AFTER_SUBMIT
0.04: ...Process "Get PK": PLSQL (AFTER_SUBMIT) declare function get_pk return varchar2 is begin for c1 in (select ORACLE_SR_SEQ.nextval next_val from dual) loop return c1.next_val; end loop; end; begin :P50_ORACLE_SR_ID := get_pk; end;
0.04: ...*Session State: Saved Item "P50_ORACLE_SR_ID" New Value="6"*
0.04: ...Process "Process Row of ORACLE_SR": DML_PROCESS_ROW (AFTER_SUBMIT) #OWNER#:ORACLE_SR:P50_ORACLE_SR_ID:ORACLE_SR_ID|IUD
0.04: Show ERROR page...
0.04: Performing rollback...
ORA-01400: cannot insert NULL into ("CAPACITY"."ORACLE_SR"."TIMESTAMP")
Unable to process row of table ORACLE_SR.
Return to application.
Any thoughts would be appreciated.
Thank you,
Justin.

If you changed the Source Type of an item from Database Column to something else, then it cannot participate in the Automated Row Fetch/Automatic Row Processing (DML) choreography. You should leave the Source Type as it was and change the item's Default Value to populate it when the ARF process fetches a null for the column.
Scott

Session state variables across multiple ApEx applications

We have a suite of loosely integrate ApEx applications that all share a common authentication scheme. When you first log in we attempt to load a series of session state variables with temporary data to streamline various logging and authentication related activities for the life of the session.
However, these session variables seem to disappear when you move from one application to another, so they are not truly tied to just the "session" which carries over across all applications, but the application from which the session state is set.
What is the suggested way, keeping in mind that the data being held may have security related context, to preserve values during a session, but regardless of which ApEx application you are in.
The method we are using to share the authentication is using a common "Cookie Name" from a common subscribed authentication scheme as suggested elsewhere on this site and seems to work very well outside of this specific issue.
Thanks in advance,
Barney

Apologies for the delay getting back on this.
My use of the word "disappear" was probably misleading. They were not visible from the second application. When setting "Session State" I was under the impression that it was setting it for the authenticated session, not for the specific application. (I am referring to the: apex_util.set/get_session_state).
Your solution will work fine, as long as I know which application the user last authenticated against. However, it could be one of over 30 (and growing) different applications which would require me writing a program to go through every "p_flow" to try and find a valid value every time I need to reference the field.
It would be really beneficial if you could store true Session variables which stay alive for the life of the authenticated session and is available to anything authenticated against that session id. This would streamline alot of cross-application program development.
The "get/set_session_state" is a misleading as it is not a Session value, but an Application value. The Session exists across multiple applications, while this procedure does not.
Thanks,
Barney

Apex bug? Items being cleared in session state - can't figure out why

I have an item that is being submitted with a value but is then being overwritten and set to null. I can't see any reason why the submitted value is being overwritten with null.
I have been debugging this problem for most of the day and can't figure out what is happening and was hoping someone in the forum might be able to shed some light.
Some details:
The item is on Page 0, has source type of "PL/SQL Expression or Function", a source expression of "V('REQUEST')", and Source Used = "Always".
I viewed the HTML source of the rendered page and can see the following HTML, so I know the item has a value when the page is rendered:
<input type="hidden" id="RENDER_REQUEST" name="p_t08" value="EDIT" />
I have used Firebug to view the HTTP POST body and can see that p_t08 is being correctly submitted with a value of "EDIT" in the post body.
When I run the page in debug mode and then view the debug log, I see that Apex is indeed setting this item to null:
     0.01500     0.01600     A C C E P T: Request="WIZ_NEXT"
     0.23400     0.00000     Session State: Save form items and p_arg_values
     0.24900     0.01600     ...Session State: Save "BRANCH_TO_PAGE_ID" - saving same value: ""
     0.24900     0.00000     ...Session State: Save "ROWS_PER_PAGE" - saving same value: ""
     0.26500     0.01500     ...Session State: Save "P0_CLEAR_WS" - saving same value: ""
     0.26500     0.00000     ...Session State: Saved Item "RENDER_REQUEST" New Value=""
I can't figure out why the item is being set to null.
This problem also does not occur on every page. The pages in question are a multi-step "wizard" that allows the user to navigate between steps with "Next" and "Previous" buttons. Since this is a page 0 item, it appears on every page in the wizard so I'd expect it to behave the same. When you open the wizard at step 1 and press next to go to step 2, the item (RENDER_REQUEST) is set correctly on step 2 of the wizard, BUT when you then click Next to go to step 3, RENDER_REQUEST is null on step 3. If you open the wizard at step 2 and press Next, RENDER_REQUEST is null on step 3.
I did find a work around, but it doesn't make any sense why it would work: if I move the RENDER_REQUEST item from the "Footer Items" region to a page level item (by using Edit All and setting its region to blank), then the problem goes away. If I move it back to the "Footer Items" region the problem reoccurs.
I am working on Application Express 4.0.2.00.07 on Oracle Database 11g Enterprise Edition Release 11.2.0.1.0.
Any help would be greatly appreciated!
Thank you.

Hi Patrick,
Thanks for the quick response. Unfortunately, I can't reproduce this on apex.oracle.com due because the app requires PL/SQL packages to be installed in several schemas, including some that require system grants (I gave a presentation at Oracle Open World a couple of years ago on some of the techniques I used in building this application that you attended; I think the session was called "Building Large Commercial Applications with Oracle Database 11g and Oracle Application Express").
Is there another way we can work together to debug this without reproducing it apex.oracle.com? For example, if you could send me an instrumented version of the APEX_040000.F procedure (or whatever procedure is clearing the session state) that has some additional APEX_APPLICATION.DEBUG calls, I could install it on my server, reproduce the error and send you the output.
Thank you,
Eric

Problem with application item and session state

Okay, let's see if I can explain this problem coherently.
I have a small app (one page), with an application item, F_WHERE_CLAUSE.
This page has three regions in which there are items that the users can populate for search conditions. A couple of these items are "select list with submit" (I still need to upgrade to the AJAX method, I know). There is another region which has one hidden field, called P1_WHERE_CLAUSE. This field is defined to "Always, replacing any value in session state..." with source type of "Item (application or page.....", and a source value of F_WHERE_CLAUSE with no default value.
I have a button called "Search" which submits the page and fires a PL/SQL process which builds a where condition based upon the other page items and stores the value to the application item F_WHERE_CLAUSE (correctly).
For testing, I've made the P1_WHERE_CLAUSE field visible so that I can see what's going on. I've also clicked the debug and session buttons to help trace this. After I click the "Search" button and the page submits, debug shows:
0.02: ...Session State: Save "P1_WHERE_CLAUSE" - saving same value: "1=1"
followed later by:
0.05: ...Session State: Saved Item "F_WHERE_CLAUSE" New Value="lower(primary_class) = 'rock' and country = 'Spain'"
The field P1_WHERE_CLAUSE displays with the correct search criteria as signified by F_WHERE_CLAUSE above. However, If I click the "session" button to view the session state values, P1_WHERE_CLAUSE shows up as:
P1_WHERE_CLAUSE Textarea 1=1 U while F_WHERE_CLAUSE displays the correct value still.
The reason this "problem" came up, is that this page also has three SQL report regions which use &P1_WHERE_CLAUSE. for the where condition. While they display the correct results on-screen, each report region also has the "Export to csv" enabled, and the export seems to be using the "1=1" condition (from the "session" window) instead of the search criteria that the on-screen region is using (F_WHERE_CLAUSE and the displayed P1_WHERE_CLAUSE), resulting in a retreival of all records.
Anybody have any idea what's going on and why, and how to get the csv export to use the correct value for the where condition?
Thanks,
Bill Ferguson

It appears the "Export to CSV" functionality requires the item value to be set in session state. The P1_WHERE_CLAUSE item value never gets saved to session state. The page is rendered and the value is put in the item on the page but until you submit the page session state doesn't know what P1_WHERE_CLAUSE is.
Create a before header computation or process to set the value of P1_WHERE_CLAUSE (which will save it to session state). It is interesting that the report regions didn't need to look at the value in session state but the "export to csv" does.
--Jeff

Need help with the session state value items.

I need help with the session state value items.
Trigger is created (on After delete, insert action) on table A.
When insert in table B at least one row, then trigger update value to 'Y'
in table A.
When delete all rows from a table B,, then trigger update value to 'N'
in table A.
In detail report changes are visible, but the trigger replacement value is not set in session value.
How can I implement this?

You'll have to create a process which runs after your database update process that does a query and loads the result into your page item.
For example
SELECT YN_COLUMN
FROM My_TABLE
INTO My_Page_Item
WHERE Key_value = My_Page_Item_Holding_Key_ValueThe DML process will only return key values after updating, such as an ID primary key updated by a sequence in a trigger.
If the value is showing in a report, make sure the report refreshes on reload of the page.
Edited by: Bob37 on Dec 6, 2011 10:36 AM

Application Item values in Session State in APEX 4.2

In 4.2, I am not able to see the session state values of my Application Items if I click "Session" at the bottom of a page. We just migrated from 4.1 and we login to a separate app than where we land upon login. I thought the "Global" scope of the Application Item would allow this to track across apps, but its not working. Is this a known issue?

fac586 wrote:
Johnny98 wrote:
In 4.2, I am not able to see the session state values of my Application Items if I click "Session" at the bottom of a page. We just migrated from 4.1 and we login to a separate app than where we land upon login. I thought the "Global" scope of the Application Item would allow this to track across apps, but its not working. Is this a known issue?When you say +"Global" scope of the Application Item+ do you mean the true global scope introduced in APEX 4.2, or are you using the term colloquially, as in "not a page item"?The new global scope introduced in 4.2
>
Johnny98 wrote:
I login to App 1, but land in App 2. My Application Item lives in App 2. Upon login of App 1, an authentication scheme calls a back end function that assigns variables to the Application Item in App 2. What back end function? How does this function assign values to application items in App 2?APEX_UTIL.SET_SESSION_STATE('APP_ROLE', rec.user_type);
>
In APEX 4.1 I can see the session state of my Application Items by clicking on the Session button. I cannot see the session state of Application Items after moving everything to APEX 4.2.Have you selected Application Items from the View select list on the session tab and clicked the Set button?Yes, thats what started this thread

APEX 4 Session State dialog sticks with wrong session

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