wqe wqe [https://community.jboss.org/people/drupalspring] created the discussion

""Large Objects may not be used in auto-commit mode" when using Postresql DB"

To view the discussion, visit: https://community.jboss.org/message/755019#755019

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I just follow the instruction in the  
http://docs.jboss.org/jbpm/v5.3/userguide/ch.console.html official documtation  
of using gwt-console :

1. Login as krisv and create an evaluation instance
2. Click the task section --> Personal Tasks to check if the process instance 
created in the previous step can be  assigned to krisv (current account ) . 
However ,  " *Large Objects may not be used in auto-commit mode*"  exception 
occurs . Belows show the details information of this errors: 

> 15:03:00,963 INFO  [stdout] (Thread-68) Hibernate: select task0_.id as 
> col_0_0_, task0_.processInstanceId as col_1_0_, names4_.text as col_2_0_, 
> subjects2_.text as col_3_0_, descriptio3_.text as col_4_0_, task0_.status as 
> col_5_0_, task0_.priority as col_6_0_, task0_.skipable as col_7_0_, 
> task0_.actualOwner_id as col_8_0_, user1_.id as col_9_0_, task0_.createdOn as 
> col_10_0_, task0_.activationTime as col_11_0_, task0_.expirationTime as 
> col_12_0_, task0_.processId as col_13_0_, task0_.processSessionId as 
> col_14_0_ from Task task0_ left outer join OrganizationalEntity user1_ on 
> task0_.createdBy_id=user1_.id left outer join I18NText subjects2_ on 
> task0_.id=subjects2_.Task_Subjects_Id left outer join I18NText descriptio3_ 
> on task0_.id=descriptio3_.Task_Descriptions_Id left outer join I18NText 
> names4_ on task0_.id=names4_.Task_Names_Id inner join OrganizationalEntity 
> user5_ on task0_.actualOwner_id=user5_.id where task0_.actualOwner_id=? and 
> (task0_.status in (?)) and (names4_.language=? or (select 
> count(names6_.Task_Names_Id) from I18NText names6_ where 
> task0_.id=names6_.Task_Names_Id)=0) and (subjects2_.language=? or (select 
> count(subjects7_.Task_Subjects_Id) from I18NText subjects7_ where 
> task0_.id=subjects7_.Task_Subjects_Id)=0) and (descriptio3_.language=? or 
> (select count(descriptio8_.Task_Descriptions_Id) from I18NText descriptio8_ 
> where task0_.id=descriptio8_.Task_Descriptions_Id)=0) and 
> (task0_.expirationTime is null)
> 
> 
> [11:17:04,031 ERROR [org.jbpm.task.service.TaskServerHandler] (Thread-70) 
> org.hibernate.exception.GenericJDBCException*: Large Objects may not be used 
> in auto-commit mode.*: javax.persistence.PersistenceException: 
> org.hibernate.exception.GenericJDBCException: Large Objects may not be used 
> in auto-commit mode.
> ]
> 11:17:04,015 ERROR [stderr] (Thread-70)     at 
> org.jbpm.task.service.persistence.*TaskPersistenceManager.queryTasksWithUserIdStatusAndLanguage*(TaskPersistenceManager.java:225)
> 11:17:04,015 ERROR [stderr] (Thread-70)     at 
> org.jbpm.task.service*.TaskServiceSession.getTasksOwned*(TaskServiceSession.java:653)
> 11:17:04,015 ERROR [stderr] (Thread-70)     at 
> org.jbpm.task.service.TaskServerHandler.messageReceived(TaskServerHandler.java:289)

Google and found that handling the "large object" in postresql is required to 
be enclosed with a transaction block. As my transaction is managed by the AS ,  
I want to ask how to force the AS to disable the  auto-commit transaction ? Do 
jbpm 5.3.0 Final really works with Postresql 9.1 ? Anyone who have successfully 
config  jbpm 5.3.0 Final  with Postresql 9.1 using AS 7.1.X please share the 
idea .

Here is my configuration : 

persistence.xml of the jbpm-human-task-war.war :

<persistence-unit name="org.jbpm.task" transaction-type="JTA"> 
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:jboss/datasources/task</jta-data-source>       
    <mapping-file>META-INF/Taskorm.xml</mapping-file>
    <properties>
      <property name="hibernate.dialect" 
value="org.hibernate.dialect.PostgreSQLDialect"/>          
      <property name="hibernate.max_fetch_depth" value="3"/>
      <property name="hibernate.hbm2ddl.auto" value="update" />
|  |     <property name="hibernate.connection.autocommit" value="false" /> |    
|
      <property name="hibernate.show_sql" value="true" />  
      <class>XXXXXXXX</class>

    <property name="hibernate.connection.autocommit" value="false" />      
        <property name="hibernate.transaction.jta.platform" 
value="org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform" 
/> 
    </properties>
  </persistence-unit>

  datasource setting in the standalone.xml:

     <subsystem xmlns="urn:jboss:domain:datasources:1.0">
            <datasources>
                <datasource jta="true" jndi-name="java:jboss/datasources/jbpm5" 
pool-name="jbpmDS" enabled="true" use-java-context="true">
                    
<connection-url>jdbc:postgresql://127.0.0.1:5433/jbpm5</connection-url>
                    <driver>postgresql-9.1</driver>
                    <security>
                        <user-name>jbpm5</user-name>
                        <password>jbpm5</password>
                    </security>
                </datasource>
                <datasource jta="true" jndi-name="java:jboss/datasources/task" 
pool-name="taskDS" enabled="true" use-java-context="true">
                    
<connection-url>jdbc:postgresql://127.0.0.1:5433/task</connection-url>
                    <driver>postgresql-9.1</driver>
                    <security>
                        <user-name>jbpm5</user-name>
                        <password>jbpm5</password>
                    </security>
                </datasource>
                <drivers>
                    <driver name="postgresql-9.1" module="org.postgresql">
                        
<xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
                    </driver>
                </drivers>
            </datasources>
        </subsystem>
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