Is isolation level setting(Dirtry Read Options) working fine for DB2?
Hello Gurus,
We are building obiee reports on DB2 OLTP database. As per my understanding if we select the Isolation level as "Dirty Read" it should not lock the tables but. In our case it is locking the tables and causing others(application Users) not to update the data. Please let us know if you have faced the same issue or any solution. Our production migration is stopped because of this issue.
Thanks,
Anil
Just a follow up, I think the isolation level is perhaps being set to REPEATABLE_READ,
since that is what seems to be happening. The value from the first read is maintained
through subsequent reads in the same transaction.
lance
"Lance" <[email protected]> wrote:
>
>I have a Message Driven Bean (MDB) that is container managed, and its
>transaction
>isolation is set to TRANSACTION_READ_COMMITTED in weblogic-ejb-jar.xml
>and that
>seems to work fine. If I look at an entity bean in onMessage which is
>updated/commited
>outside the transaction I can see the updates no problem.
>
>Now the problem is this.. inside the onMessage method, the MDB creates
>a new
>instance of a class. This class starts up its own UserTransaction (using
>(UserTransaction)new
>InitialContext().lookup("javax.transaction.UserTransaction")) and goes
>into a
>loop working away. Inside the loop it is inspecting a value on an entity
>bean.
> The classs never sees any updates to this bean which are made outside
>this new
>UserTransaction.
>
>It looks to me that the UserTransaction that the class is getting has
>a different
>isolation level (serialized?). Is there a way to set the isolation level
>for
>a UserTransaction?
>
>Any help would be great!
>
>lance
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