[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-6073) Dialects cannot use the Thread Context ClassLoader with AS7, please change to use the

[Scott Marlow (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-6073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Scott Marlow updated HHH-6073:
------------------------------

    Description: 
We can no longer rely on TCCL because AS7 is following a modular class loading approach.  The AS7 "org.hibernate" module isn't setup to access the JDBC classes.

We discussed changing the dialects to not use the TCCL as a workaround.  Or perhaps passing in a ClassLoaderService.

The following warning shows what we currently see with Hibernate 3.6.1 and the DerbyDialect (TCCL is null).

08:45:27,597 INFO [org.hibernate.dialect.Dialect] (MSC service thread 1-6) Using dialect: org.hibernate.dialect.DerbyDialect
08:45:27,603 INFO [org.hibernate.dialect.Dialect] (MSC service thread 1-2) Using dialect: org.hibernate.dialect.DerbyDialect
08:45:27,614 WARN [org.hibernate.dialect.DerbyDialect] (MSC service thread 1-6) Unable to load/access derby driver class sysinfo to check versions : java.lang.ClassNotFoundException: org.apache.derby.tools.sysinfo from [Module "org.hibernate:main" from local module loader @fee4648 (roots: /work/as7-dev/jboss-as/build/target/jboss-7.0.0.Beta2/modules)]
08:45:27,616 WARN [org.hibernate.dialect.DerbyDialect] (MSC service thread 1-2) Unable to load/access derby driver class sysinfo to check versions : java.lang.ClassNotFoundException: org.apache.derby.tools.sysinfo from [Module "org.hibernate:main" from local module loader @fee4648 (roots: /work/as7-dev/jboss-as/build/target/jboss-7.0.0.Beta2/modules)]


  was:
We can no longer rely on TCCL because AS7 is following a modular class loading approach.  The AS7 "org.hibernate" module isn't setup to access the JDBC classes.  For creating dialects, could we instead use the classloader from the java.sql.Connection that is passed into the DialectFactory.

The following warning shows what we currently see with Hibernate 3.6.1 and the DerbyDialect (TCCL is null).

08:45:27,597 INFO [org.hibernate.dialect.Dialect] (MSC service thread 1-6) Using dialect: org.hibernate.dialect.DerbyDialect
08:45:27,603 INFO [org.hibernate.dialect.Dialect] (MSC service thread 1-2) Using dialect: org.hibernate.dialect.DerbyDialect
08:45:27,614 WARN [org.hibernate.dialect.DerbyDialect] (MSC service thread 1-6) Unable to load/access derby driver class sysinfo to check versions : java.lang.ClassNotFoundException: org.apache.derby.tools.sysinfo from [Module "org.hibernate:main" from local module loader @fee4648 (roots: /work/as7-dev/jboss-as/build/target/jboss-7.0.0.Beta2/modules)]
08:45:27,616 WARN [org.hibernate.dialect.DerbyDialect] (MSC service thread 1-2) Unable to load/access derby driver class sysinfo to check versions : java.lang.ClassNotFoundException: org.apache.derby.tools.sysinfo from [Module "org.hibernate:main" from local module loader @fee4648 (roots: /work/as7-dev/jboss-as/build/target/jboss-7.0.0.Beta2/modules)]



> Dialects cannot use the Thread Context ClassLoader with AS7, please change to use the 
> --------------------------------------------------------------------------------------
>
>                 Key: HHH-6073
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6073
>             Project: Hibernate Core
>          Issue Type: Task
>            Reporter: Scott Marlow
>            Priority: Blocker
>             Fix For: 4.0.0.Alpha2
>
>
> We can no longer rely on TCCL because AS7 is following a modular class loading approach.  The AS7 "org.hibernate" module isn't setup to access the JDBC classes.
> We discussed changing the dialects to not use the TCCL as a workaround.  Or perhaps passing in a ClassLoaderService.
> The following warning shows what we currently see with Hibernate 3.6.1 and the DerbyDialect (TCCL is null).
> 08:45:27,597 INFO [org.hibernate.dialect.Dialect] (MSC service thread 1-6) Using dialect: org.hibernate.dialect.DerbyDialect
> 08:45:27,603 INFO [org.hibernate.dialect.Dialect] (MSC service thread 1-2) Using dialect: org.hibernate.dialect.DerbyDialect
> 08:45:27,614 WARN [org.hibernate.dialect.DerbyDialect] (MSC service thread 1-6) Unable to load/access derby driver class sysinfo to check versions : java.lang.ClassNotFoundException: org.apache.derby.tools.sysinfo from [Module "org.hibernate:main" from local module loader @fee4648 (roots: /work/as7-dev/jboss-as/build/target/jboss-7.0.0.Beta2/modules)]
> 08:45:27,616 WARN [org.hibernate.dialect.DerbyDialect] (MSC service thread 1-2) Unable to load/access derby driver class sysinfo to check versions : java.lang.ClassNotFoundException: org.apache.derby.tools.sysinfo from [Module "org.hibernate:main" from local module loader @fee4648 (roots: /work/as7-dev/jboss-as/build/target/jboss-7.0.0.Beta2/modules)]

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