Bugs item #722539, was opened at 2003-04-16 18:16
Message generated for change (Comment added) made by loubyansky
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Category: JBossCMP
Group: v3.2
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Simone (milasx)
>Assigned to: Alexey Loubyansky (loubyansky)
Summary: JDBCOptimisticLocking looses preload data
Initial Comment:
In the following scenario, when using
JDBCOptimisticLocking,
startTransaction
Collection c = findSomeStuff();
for(Iterator iter = c.iterator(); iter.hasNext(); )
{
MyEJB e = (MyEJB)iter.next();
log.info(e.getMyStuff);
}
commitTransaction
All the preload data is lost after each iteration of
the loop.
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>Comment By: Alexey Loubyansky (loubyansky)
Date: 2003-05-27 19:38
Message:
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Fixed.
alex
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Comment By: Simone (milasx)
Date: 2003-05-15 13:35
Message:
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Is it clear enough now? Please let me know.
Thanks!
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Comment By: Simone (milasx)
Date: 2003-05-07 12:01
Message:
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Assumptions:
The finder method finds 100 entities
We use a read-ahead with page size of 50
Under this assumpions JBoss should issue 2 select statements
to retrieve all the Entities. What actually happens is that
JBoss correctely issues an SQL statements to preload 50
Entities:
SELECT from table .... WHERE PK=1st AND PK=2nd .... AND
PK=50th and loads all the 50 Entities.
Then reads the first Entity.getStuff().
On the next loops iteration when doing Entity.getStuff() for
PK=2nd does not find the preloaded data (lost!) and issues
anothe SQL statements now from 2 to 51 and so on for a total
of 100 SQL Select each loading 50 Entities and loosing all
of them after each iteration.
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Comment By: Anil Saldhana (osdchicago)
Date: 2003-05-07 03:26
Message:
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Can you elaborate on this problem?
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