Hi,

Issue:
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Created simple Java Application with Hibernate 3.0 over Oracle 8i.

While executing it getting following error message:

Initial SessionFactory Creaion Failed.java.lang.AbstractMethodError: oracle.jdbc.driver.OracleDatabaseMetaData.supportsGetGeneratedKeys()Z
Exception in thread "main" java.lang.ExceptionInInitializerError
at HibernateUtil.buildSessionFactory(HibernateUtil.java:27)
at HibernateUtil.<clinit>(HibernateUtil.java:17)
at EvenManager.createAndStoreEvent(EvenManager.java:33)
at EvenManager.main(EvenManager.java:26)
Caused by: java.lang.AbstractMethodError: oracle.jdbc.driver.OracleDatabaseMetaData.supportsGetGeneratedKeys()Z
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:123)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339)
at HibernateUtil.buildSessionFactory(HibernateUtil.java:23)
... 3 more


While decompiling SettingFactory.class & OracleDataBaseMetaData.class I found that implementation of "supportsGetGeneratedKeys()" method is missing in OracleDataBaseMetaData.java because of which I am getting "AbstractMethodError" exception.

I am using "classes12.zip" for the Oracle-Thin Driver (FYI)

I shall be obliged if anyone can suggest me the root cause of the same.

Cheers,
Gajendra Singh Tomer (SCJP 5.0,SCWCD 5.0, ITIL V3.0)

Further into my analysis I found that I am using Oracle 8i with Hibernate 3.0 may be because of that I am getting AbstractMethodError exception.

This is so because OracleDatabaseMetaData class of Oracle8i doesn't support DataBaseMetaData interface of Hibernate3.0.

Comment please:)

Regards,
Gajendra

Hi Gajendra,

The DataBaseMetaData you mention is not an interface of Hibernate3.0,
It is java.sql.DataBaseMetaData and therefore part of the java runtime.
Most probably you are using a very old or uncomplete jdbc-driver.
Do you use the latest jdbc-driver for oracle8 ?

Guenther

Hi Guenther !

Thanks for the response.
You are right that "DatabaseMetaData" interface is provided by Java.
So it's not a problem of Hibernate. Agreed!
I am using Type-4 JDBC Driver Of Oracle having version 8.1.7.

Don't know is there any other driver more latest than this for Oracle8i.

Let me see into that but if you know then please let me know.

I shall be thankful to you.

Warm Regards,
Gajendra Singh Tomer

Did you by any chance find a resolution to your problem? I'm experiencing the exact same issue. However, in my case I'm using Oracle 10 with a very old 1.4 version of the JDK (which I don't have the option to upgrade). I'm wondering if this combination is possible for use with Hibernate 3.

There may be some configuration options that if disabled may help solve this problem. Seems like the problem in the original post could have something to do with the 'hibernate.jdbc.use_get_generated_keys' option. Read http://docs.jboss.org/hibernate/stable/ ... n-optional for more information.

I have the same problem and I noticed a change in org.hibernate.cfg.SettingsFactory:

- in hibernate 3.2.7.ga the code checked for the presence of supportsGetGeneratedKeys and therefore works fine
- in hibernate-core 3.3.2.GA the code just calls the function without checking and therefore fails

hibernate.jdbc.use_get_generated_keys doesn't prevent this.
So the question is: why did they change the code in 3.3.2?

Regards, CL

Thanks for the catch, CL. I've created a bug report for this at http://opensource.atlassian.com/project ... e/HHH-5017. It's my first time filing a Hibernate bug report, so I'll probably get my hand slapped for leaving something out or breaching etiquette in some way. When I get into the office I'll try to add some test case information for my own situation... if anyone else wants to add anything to the ticket, the link is above.

The savety-check was removed in revision 15338, the comment was:
HHH-3525 : JDK 1.4 isolation reflection

The problem occurs also with DB2, not only Oracle.

Regards, Christian