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From "Mike Matrigali (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3650) internal multiple references from different rows to a single BLOB/CLOB stream leads to various errors when second reference used.
Date Wed, 02 Jul 2008 04:14:45 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3650?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mike Matrigali updated DERBY-3650:
----------------------------------

    Attachment: derby-3650-preliminary_diff.txt

The derby-3650-preliminary_diff.txt diff shows the direction I am trying to fix this bug.
 It is not ready for commit yet.
Still needs tests to run, some more comments, maybe some more tests.  I need to verify that
this change has not made DERBY-3749 worse.  Also need to see if the NestedLoopJoinResultSet.java
changes need to be applied to any other nodes, hash joins seem to be taken care of.  Looks
like NestedLoopLeftOuterJoinResultSet.java
could use the change, would like a test case that gets into that code first.

> internal multiple references from different rows to a single BLOB/CLOB stream leads to
various errors when second reference used.
> ---------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3650
>                 URL: https://issues.apache.org/jira/browse/DERBY-3650
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Client
>    Affects Versions: 10.3.3.0, 10.4.1.3
>         Environment: Mac OSX 10.4
> JDK 1.5.0_13
> Hibernate EntityManager 3.2.1
>            Reporter: Golgoth 14
>            Assignee: Mike Matrigali
>         Attachments: derby-3650-preliminary_diff.txt, derby-3650_tests_diff.txt, Derby3650EmbeddedRepro.java,
Derby3650FullClientRepro.java, Derby3650FullRepro.java, Derby3650Repro.java, DerbyHibernateTest.zip,
testdb.zip, traces_on_FormatIdStream_alloc.txt, UnionAll.java
>
>
> Derby + Hibernate JPA 3.2.1 problem on entity with Blob/Clob
> 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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