Multiple insance of same transaction (asynchronous mode)

Hello
I created a structured service composed by:
- a master transaction executed every 10 minutes which runs several instances (30) of a slave transaction with Asynchronous mode
- a slave transaction with duration between 1 minute and 3 minutes.
I found that
- master transaction complete its task in 10 seconds and runs all 30 instances of slave transactions (asynchronous)
- 18 slave transactions start at once
- 12 slave transactions remain in pendig status till first group finishes
Have you ever found this behaviour?
Is this 18 a fixed limit or a MII parameter? Where could I change it?
Thanks a lot
Regards
Fabio
ps: MII 12.2, netweaver 7.3

Hello Fabio,
Transactions launched asynchronously are handled by MII via JMS and EJB.
You may be able to adapt the behavior in such execution, but it may affect directly the system performance.
I suggest you to check section 'Transactions stuck in PENDING state' of MII handbook.
http://wiki.scn.sap.com/wiki/download/attachments/15603/SAP+MII+Handbook.pdf
Please keep in mind that performance tests are necessary if you modify those values.
Hope it helps !
Please let us know the results.
Best regards,
Raphael

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Important notes:
- This error occurs only if you insert multiple children, if you insert just one child in the same transaction everything works fine.
- We have tested this application directly via "Run" BC application module and there everything works fine just like it hast to be.
- Because we have a “Composed” association we don’t need to override the postChanges() method in order to controls the order for saving the entities (regarding the documentation).
- Related to thread: http://forums.oracle.com/forums/thread.jspa?threadID=897936&tstart=30

Gert,
I think Frank's suggestion was that you file the test case with Oracle Support (Metalink) ;)
John

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SeanB15 wrote:
Here are more details on my situation which should help clarify things...
I purchased three iPhone 4 models back when they first came out (for my family) that all share the same iTunes account for access to apps and music, but each phone/user still has his/her custom contact list, email accts, and select lists of apps and music from the one iTunes acct library. The problem is (as I understand it) that I can only update the software on one of the three iPhones – the primary phone I used to setup the iTunes acct without wiping out the separate contact lists, etc. As it stands today... the first (primary) iPhone associated with the iTune acct has been updated with the latest software version 5.1.1 and sync'd up with all the apps, music, etc from the one iTune acct, while the other two iPhones are still running on the original software version 4.0.2 and are experiencing problems now. I was advised by AT&T back in January that it would be necessary to setup separate iTunes accts for the second and third iPhones in order to receive system updates and still be able to manage separate contact lists, etc. If I go this route, I assume we will lose all the apps on phones #2 and #3 that we have been "sharing"... correct? Since this AT&T advice was prior to iCloud coming out, would iCloud be a better solution or at least part of the solution? I really don't yet understand how iCloud works. Hopefully, one of you can help me??
we have 2 iphone 4's synced to the same itunes account for apps and music since the day we bought them, but each has a different icloud acct. they have both been updated on the same itunes account with every update that has come out since we bought them in december of 2010. nothing on either phone has ever been lost or duplicated. having said all that, maybe i'm missing something here, but we have had no problems. we do have itunes setup to sync manually. i do believe i'm a piker compared to lawrence finch, but i'm just telling you what happens in my house. maybe check with apple? is there a store near you?

How to use/sync single data (file) across multiple instances of same application

Currently we have an application (a diagram editor), that have the ability to save and load (serialize) its state in a xml file.
Now we want this application to behave like Microsoft OneNote application. Where multiple users have the ability to access the same file.
Later we may also need to enhance with other things like, (1)what is changed and who changed it, (2)option to resolve conflicts if any.
I came to know about sync framework to resolve this. so far, i have not tried it.
All i want is,
Virtually single file should be edited by multiple instances of same application.
We need a dll (sync framework) that does following
It takes complete responsibility of file handling.
Using this dll, each instance of the application will notify their own changes.
Each instance of the application should have the ability to detect the changes that is recently made (when, who, what are the changes).
My question:
Will sync framework be suitable for this requirement?
If so, is there a demo application that represents this?
- Jegan

Seems like I have found the solution.
In the taskflow there is a property named data-control-scope and I set it to isolated instead of the default (shared) and this seemed to do the trick.
I can now have two instances of the same taskflow running with different ApplicationModules
Cheers,
Mark

How to use same transaction when calling CMP entity beans and DAO (JDBC)

We are currently using Weblogic 8.1 SP2 with an Oracle 10g database (using XA thin and non-XA drivers).
We have a session bean that invokes an entity bean and a DAO (data access object pattern) in order to add data in 2 separate tables (account and history). Rows are added to the first (account) table using a CMP Entity bean while inserts are done in the 2nd (history) table using a DAO. Here is some pseudo code:
addHistorySessionBean (trans-attribute="Required")
begin
Step #1 - call addAccountEntityBean (trans- attribute="Required")
Step #2 - call addHistoryDAO (get datasource, connection)
end
The 2nd table (history) has a foreign key constraint to ensure that the corresponding key exists in the first (account) table. Unfortunately, DAO inserts on the 2nd (history) table fail with a foreign key constraint violation (INTEGRITY CONSTRAINT VIOLATION - PARENT KEY NOT FOUND!) since they cannot see the row added to the 1st (account) table in step #1 by the CMP entity bean.
How does one ensure that all this is done in a single transaction ? It appears that the app server creates two seperate transactions (one for the session bean facade and the entity bean and a 2nd transaction (when we retrieve a connection using the same data source JNDI name) for the DAO.
A post on server side suggested using a "<resource-ref>" in the session bean to tie the two potentially separate transactions together, but that does not work for us. However, I am not sure if we are doing that correctly. After we define the resource ref in the session facade bean, do we use the resource ref "name" attribute to lookup the datasource or do we still lookup the datasource by JNDI name ? Do we need to define the resource-ref tag in the entity bean also ?
Does Weblogic allow using a single transaction for this type of a scenario ? How does one specify within Weblogic that the same transaction should be utilized by the entity bean and any subsequent DAOs?
People have also suggested that we defer constraint checking until the transaction(s) are committed but that sounds like a work acount without addressing this issue. Would postponing the constraint checking in Oracle cause any additional overhead ?
Any suggestions with specific examples or documentation on how to address this issue will be gratefully appreciated.

Thanks for your suggestion. Unfortunately, this does not work since it appears that there are 2 separate transactions going on here. One, the original one initiated by the session bean and used by the entity bean and the other initiated by the DAO. Any other ideas appreciated.
Hi,
Try setting the delay-database-inserts tag to
ejbCreate in RDBMS descriptor file.
http://bernal/stage/wls/docs81/ejb/DDreference-cmp-jar
.html#1113981
vasanthi ramesh

Multiple insance of same transaction (asynchronous mode)

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