[Hibernate-issues] [Hibernate-JIRA] Commented: (EJB-201) Ejb3Configuration should output a warning if no persistence.xml is found

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    [ http://opensource.atlassian.com/projects/hibernate/browse/EJB-201?pag=
e=3Dcomments#action_23457 ]=20

Ren=C3=A9 Treffer commented on EJB-201:
----------------------------------

Ok, this seems to be a WebApp problem, you won't find the normal META-INF/p=
ersistence.xml by your ClassLoader. I've found comments of other user havin=
g the same problem with Toplink and Tomcat.

WEB-INF/classes/META-INF is the correct location for web applications, perh=
aps hibernate could give a hint about that?

> Ejb3Configuration should output a warning if no persistence.xml is found
> ------------------------------------------------------------------------
>
>          Key: EJB-201
>          URL: http://opensource.atlassian.com/projects/hibernate/browse/E=
JB-201
>      Project: Hibernate Entity Manager
>         Type: Improvement

>   Components: EntityManager
>     Versions: 3.2.0.cr1
>  Environment: Any Environment with missing persistence.xml or bad ClassLo=
aders
>     Reporter: Ren=C3=A9 Treffer

>
> Original Estimate: 30 minutes
>         Remaining: 30 minutes
>
> If persistence.xml can't be found javax.ejb.Persistence return's "No Pers=
istence found for EntityManager <name>".
> However it might help a lot of people if Ejb3Configuration could output a=
 warning in
> public EntityManagerFactory createEntityManagerFactory(String emName, Map=
 integration) {
> The warning might be something like "No META-INF/persistence.xml found". =
In my case it looks like a Jetty6 ClassLoader problem, a simple warning mig=
ht have saved me hours of bugtracking.
> A sample Trace:
> 93676 [btpool0-20] INFO  org.hibernate.ejb.Version  - Hibernate EntityMan=
ager 3.2.0.CR1
> 93712 [btpool0-20] INFO  org.hibernate.cfg.annotations.Version  - Hiberna=
te Annotations 3.2.0.CR1
> 93729 [btpool0-20] INFO  org.hibernate.cfg.Environment  - Hibernate 3.2 c=
r2
> 93736 [btpool0-20] INFO  org.hibernate.cfg.Environment  - hibernate.prope=
rties not found
> 93739 [btpool0-20] INFO  org.hibernate.cfg.Environment  - Bytecode provid=
er name : cglib
> 93752 [btpool0-20] INFO  org.hibernate.cfg.Environment  - using JDK 1.4 j=
ava.sql.Timestamp handling
> 93923 [btpool0-20] DEBUG org.hibernate.ejb.Ejb3Configuration  - Trying to=
 find persistence unit: losem
> <<< Here should be a "WARN org.hibernate.ejb.Ejb3Configuration - No META-=
INF/persistence.xml found"
> followed by=20
> java.lang.ExceptionInInitializerError
> ......
> Caused by: javax.persistence.PersistenceException: No Persistence provide=
r for EntityManager named losem
>         at javax.persistence.Persistence.createEntityManagerFactory(Persi=
stence.java:41)
>         at javax.persistence.Persistence.createEntityManagerFactory(Persi=
stence.java:27)
>         at de.rtjava.los.pmanager.PersistenceManager.<clinit>(Persistence=
Manager.java:58)
>         ... 29 more
> Good luck and a big thank-you fr Hibernate!

--=20
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