Bugs item #742197, was opened at 2003-05-23 18:16
Message generated for change (Comment added) made by scoy
You can respond by visiting:
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Category: JBossCMP
Group: v3.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Federico (nabuccodonosor)
Assigned to: Nobody/Anonymous (nobody)
Summary: getEJBLocalObject() bug
Initial Comment:
- Tested OS:
Win XP - service pack 1
SuSe Linux 8.0
- VM Sun 1.4.1_1
- SOFTWARE:
enterprise-server : jboss-3.2.1_tomcat-4.1.24 (on Win
XP - service pack 1 and SuSe Linux 8.0 )
database : mysql 4.0.12 (on Suse Linux 8.0)
driver for db : 3.0.6 mysql-connector
I got no exception stack, no error on the console, but
mismatched fields of a row comes out, because of the
getEJBLocalObject() to fetch a primary key of an auto
incremental key field after the bean has been passivated.
Before the time out everything is ok, after the time out I
got wrong datas.
The test I did to reproduce the bug has been a very
simple test:
A single table "test" on db with 3
fields "id_test" , "s_des_1" , "s_des_2"
An entity bean related to the table with no definition
of "id_test" cmp field, because an auto incremental key
field
In the entity bean i did the getId_test business method
to fetch the primary key in this way
public int getId_test()
{
final TestLocal test = (TestLocal)
context.getEJBLocalObject();
return ((Integer)test.getPrimaryKey()).intValue();
}
Then I created a stateless session bean that call a
findAll() method on the local home interface of the entity
to fetch the table rows and then copy the collection
result in a collection of javabeans.
The javabeans has the same three variables
int id_test
String s_des_1
String s_des_2
When in the session bean I set the id_test variable, I
call on the local interface the getId_test method of the
entity bean.
I call the session bean method from a servlet that pass
the collection to a jsp that show the table's rows on the
browser.
All is ok until i wait the time out period without do calls.
After timeout period the rows result corrupt: right
descrition (fetched by abstract method) but wrong
id_test (fetched by getEJBLocalObject().getPrimaryKey
()).
Not always the problem comes out but during my test it
is happened again.
I'm going to attach to this mail a .zip file with the .jar for
the EJBs (with sources) and a .war file for the servlet
and jsp (with sources).
Furthermore in the .zip file I put two .sql files to
generate table and test datas and a .doc file to describe
different results.
The last thing to say is that if I bypass the getId_test()
call by calling directly the getPrimaryKey() on the
Loacal interface instead of calling getId_test() method,
everything is ok.
This could be a sneaky problem, that people could not
see.
I hope to receive a reply from you.
Thanks a lot!
Federico
P.S. I forgot that with the jboss-3.2.0RC2_tomcat.4.1.18
is always ok.
----------------------------------------------------------------------
Comment By: Stephen Coy (scoy)
Date: 2003-07-19 00:46
Message:
Logged In: YES
user_id=463096
There is now a test case in Branch_3_2 that demonstrates this
problem.
./build.sh -Dtest=cmp2/passivation test
in the the testsuite directory.
----------------------------------------------------------------------
Comment By: Stephen Coy (scoy)
Date: 2003-07-18 01:33
Message:
Logged In: YES
user_id=463096
I've added a test to the jboss test suite that demonstrates this
which I will check in sometime during the next day or so.
In essence, after an entity bean is passivated, and then activated
again:
o.getPrimaryKey() != o.ctx.getEJBLocalObject().getPrimaryKey()
It was (too) easy to replicate.
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