Popping up Disco portlet in portal?

Hi folks.
This is a Discoverer portlet question for 9iAS. In short, it seems that you can't set a portlet to pop up. (I am not trying to pop up Disco Plus or the Viewer -- I am trying to pop up a portlet specifically. In the tar I've entered at Oracle support, it seems that this last point is hard to grasp.)
A nice feature of the 9iAS portal is that a portlet can have its attribute set so that instead of showing in a portal region, it displays in a new browser region.
The way you do this is:
1. Define and refresh the portlet as usual.
2. Go to graphical layout mode and click the pencil to change the attributes. Set the "Display Options" attribute to "Link that Displays Item in New Browser Window."
3. Now go to the Region attributes, click the Attributes/Style tab, and make sure that the attribute "Display Name or Image" is included in the Displayed Attributes.
4. Now return to your page view.
5. Click on the link for the worksheet.
6. You will see the portlet pop up, but it says: "Error: The portlet has not been defined."
This is of course wrong, because if you change the display back to "Item Displayed Directly in Page Area," it shows fine.
Other parameterized (i.e., customizable) portlets work fine: For instance, database portlets pop up just right.
Can someone verify this for me?
Note that this a portlet I'm trying to pop up. Popping up a Viewer page is not adequate, because I want to use the simple portlet customization features. Also, popping up a Plus session is not good either in our environment.
[Aside: Unless I am wrong, this is another example of Discoverer's inadequate integration with 9iAS portal. Among the other important issues are: You can't pass page parameters to a Disco portlet; the little drop-down arrow that is supposed to "minimize" the portlet doesn't work; data points aren't headed right in portlets or the viewer; Viewer URLs with MANY parameters don't work; I could go on and on.]

After some interchanges with Support, it turns out that this functionality does not exist due to architectural issues regarding the Discoverer/Portal integration. The problem has been logged as a bug. They guess: Maybe 9.0.5.

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The subject line says it all:
If you have a parameterized sheet, should one get a drop-down of possible values when a Disco portlet is defined in 9iAS Portal? Or does one have to always type in the values manually?
(I have created a custom item class with the LOV; works w/ Plus, Viewer, and Desktop.)
John N.
[email protected]

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Hi,
Let me see if I can start the ball rolling for you on this one with some insight from previous implementations.
"What's happening is at the 00 minute mark, each user is having their Portlet A being refreshed. As the number of users grows, this just gets worse and worse. There seem to be refreshes happening constantly. The kicker is, these hourly refreshes happen regardless of the user looking at the portal that day or not."
1. The portlets will get refreshed once per main portlet and an additional refresh for each customization. This could explain why you are seeing more refreshes than you expected.
2. The refreshes will occur per the schedule to refresh the data in cache whether or not the user is logged in.
The way is works at very high-level is like this:
The PortletProvider is a J2EE application running under OC4J_BI_Forms container.
It polls PTM5_SCHEDULE table every 2 seconds or as specified by peekSleepIntervalSec parameter in the configuration.xml
If a portlet refresh is found (ie the scheduled refresh time arrives) then the information about the refresh is added into a job queue within OC4J_BI_Forms.
Java threads pick up jobs from the queue (parallel processing, maxsessions).
For each job a session is picked up from the session pool, query is generated and sent to EUL/database to retrieve data.
Next, retrieved data is processed into XML and stored in PTM5_CACHE table as BLOB.
The PTM5_SCHEDULE table is updated with Last Refresh Date and Next Refresh Date, etc.
The next time the relevant portlet is accessed in a browser refreshed data are read from PTM5_CACHE (and formatted per customization).
Discoverer Portlet sessions can be pooled, enabling them to be reused by different Discoverer Portlets. Pooling Discoverer Portlet sessions saves CPU and memory resource usage.
You can see how to control these parameters via the Application Server Control or $OH/discoverer/configuration.xml file in the documentation here:
http://download.oracle.com/docs/html/B13918_03/con_files.htm#sthref1195
Now having said that, there have been a few bugs in the Portlet provider regarding how the session pool behaves and one that does not kill existing dis51ws processes.(bug 4929480)
I also seem to recall from past a bug about hourly refreshes specifically.
(bug 4929480) is documented in
Note 436135.1 Discoverer 10g (10.1.2) Sessions (dis51ws) Are Not Terminated After Timeout Causing Users Unable To Login
Oracle has produced some patches, but which one you apply really depends upon your version, environment (ie. EBS11i/SSO integrated or not), current patches applied and your platform.
You may have to work that out with Oracle Support, but I can tell you in general some good one-off merge patches that you should apply (based on my experiences).
From the note above:
For versions 10.1.2.1 / 10.1.2.0.2 (Discoverer 10.1.2.48.18 and 10.1.2.50.05):
Patch 5922220 is the latest known Portlet merge patch on top of 10.1.2.1 (10.1.2.50.05) for E-Business Suite Single Sign-On integrated customers and Patch 5497101 is the latest known Portlet merge patch on top of 10.1.2.1 (10.1.2.48.18) for other customers. Both of these patches include the above fix.
# For versions 10.1.2.2 (Discoverer 10.1.2.54.25):
* We recommend you apply Discoverer "cumulative patch II" ( Patch 6129303 ) as directed by Oracle Support if it is appropriate for your environment.
I would consider:
A.) Make sure you are patched appropriately
B.) Make sure you have tuned your Discoverer portlet session pool.
C.) If the load is large enough, you may need to consider an additional Discoverer standalone server with a load balancer.
A note on that: Load balancing portlets is a bit different than standard HTTP applications (Plus/Viewer) since each portlet application on each server will be checking the refresh table in the metadata repository (infrastructure) database.
You will have to ensure:
a.) the times on each server is synchronized
b.) the the peeksleepinterval is adjusted on each server to accommodate a smaller server vs. larger server (ie. which one you want to pick up more of the refreshes)
Oracle Support has documented those pretty well in MetaLink document 360310.1 How Discoverer Portlet Provider Refreshes Are Distributed In A Load Balanced Environment
I hope that helps get you started.
Other comments / experiences welcomed.
Regards,
Steve.

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Edited by: 944658 on 05-Jul-2012 08:12

Hi Thank you very much for responding to my problem.
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