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From "Golgoth 14 (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (DERBY-3650) Derby + Hibernate JPA 3.2.1 problem on entity with Blob/Clob
Date Tue, 29 Apr 2008 15:13:56 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12593036#action_12593036
] 

golgoth14 edited comment on DERBY-3650 at 4/29/08 8:12 AM:
------------------------------------------------------------

I've attached a test case.

You should modify the value of the variable "childrenCout" into the method "insertData".
If the value is about 10, the error not appear.
If the value is about 100 or 1000, the exception describe below is thrown.

      was (Author: golgoth14):
    The test case
  
> Derby + Hibernate JPA 3.2.1 problem on entity with Blob/Clob
> ------------------------------------------------------------
>
>                 Key: DERBY-3650
>                 URL: https://issues.apache.org/jira/browse/DERBY-3650
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Client
>    Affects Versions: 10.4.1.3
>         Environment: Mac OSX 10.4
> JDK 1.5.0_13
> Hibernate EntityManager 3.2.1
>            Reporter: Golgoth 14
>         Attachments: DerbyHibernateTest.zip
>
>
> Hi,
> I'm using Derby in Client - Server mode with Hibernate JPA EJB 3.0.
> When a query on an entity containing a Clob and some joins on other entites is executed,
an exception with the following message is thrown:
>   XJ073: The data in this BLOB or CLOB is no longer available.  The BLOB/CLOB's transaction
may be committed, or its connection is closed.
> This problem occurs when the property "hibernate.max_fetch_depth" is greater than 0.
> When hibernate.max_fetch_depth=0, the query works.
> If Derby is configured in embedded mode, the query works independently of the value of
hibernate.max_fetch_depth.
> On the Hibernate's documentation, the advised value of hibernate.max_fetch_depth is 3.
> Could you explain me if I made something wrong ?
> Thank you.
> Stephane

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