[jboss-jira] [JBoss JIRA] Commented: (JBPM-1071) Possible problem in concurrent signalling from multiple threads

[Tom Baeyens (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBPM-1071?page=comments#action_12387103 ] 
            
Tom Baeyens commented on JBPM-1071:
-----------------------------------

just installed MySQL on my windows box and configured the test suite to go to MySQL.  Verified it in the logs that the set up was ok.  

The lost Locking test still succeeds.  Tried with the defaults and with 

    <property name="hibernate.connection.isolation">8</property>
    <property name="connection.pool_size">10</property>

Any suggestions ?

> Possible problem in concurrent signalling from multiple threads
> ---------------------------------------------------------------
>
>                 Key: JBPM-1071
>                 URL: http://jira.jboss.com/jira/browse/JBPM-1071
>             Project: JBoss jBPM
>          Issue Type: Bug
>          Components: Core Engine
>    Affects Versions: jBPM jPDL 3.2.2
>         Environment: Linux  2.6.21-1.3228.fc7 #1 SMP Tue Jun 12 14:56:37 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
> MySQL 5.0.22
>            Reporter: Jiri Pechanec
>         Assigned To: Tom Baeyens
>            Priority: Critical
>         Attachments: expl.tar.gz, LockingTest.java
>
>
> Attached is a simple test case that
> 1) Deploys process definition with two nodes
> 2) Starts the process instance that will go to the wait state on first node
> 3) Starts 20 threads that tries concurrently signal the same process instance
> 4) The second node writes a record to the database
> The test case needs to be executed multiple times to see the incorrect behaviour.
> This is an example of run output
> Isol 8
> Action 1
> Action 2
> Action 2
> Action 2
> Action 2
> Action 2 1
> Action 2 1
> Action 2 1
> Action 2 1
> Signalist 5
> Signalist 6
> Signalist 8
> Signalist 12
> Signalist 7
> Signalist 13
> Signalist 14
> Signalist 15
> Signalist 9
> Signalist 16
> Signalist 17
> Signalist 18
> Signalist 4
> Success 7
> Failure 13
> Explanation of the outcome
> 4 threads successfully executed the node action including database operation. All database opeartion were comitted (4 new records were created)
> 3 threads successfully executed the signal operation but no real action was performed
> 13 threads attempted to execute the signal operation but ended with an exception

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira