Werner,
I'm afraid this problem is not fixed completely since the version I'm using is
built from CVS. Would you please have a try?
Thanks,
Sean
----- Original Message -----
Sent: Thursday, December 02, 2004 5:27 PM
Subject: Re: [castor-user] [JDO] Key Generator Failure. Duplicated Identity is
generated!
>
> Sean,
>
> are you still using Castor 0.9.5.3 ? Afair, this problem has been fixed in
> CVS, and will be part of the upcoming 0.9.6 release.
>
> Thanks
> Werner
>
> PS The problem fixed is that as a result of an ObjectNotFoundException,
> sometimes a lock has not been released.
>
>> This might be a bug of castor, please try on your project to see if it
>> would happen.
>>
>> I'm using mysql and my mapping file contains something like this:
>> -------------------------------------
>> <key-generator name="HIGH-LOW">
>> <param name="table" value="sequence"/>
>> <param name="key-column" value="tablename"/>
>> <param name="value-column" value="currentid"/>
>> <param name="same-connection" value="true"/>
>> <param name="grab-size" value="1"/>
>> </key-generator>
>>
>> <class identity="id" key-generator="HIGH-LOW" name="model.User">
>> <map-to xml="user" table="user" />
>> <field name="id" type="integer">
>> <sql name="id" type="integer" />
>> </field>
>> <field name="name" type="string">
>> <sql name="name" type="varchar" />
>> </field>
>> </class>
>>
>> Suppose that current MAX id of user table is 1000, and the following
>> statments:
>> -------------------------------------
>> Integer id = new Integer(1001);
>> User user = database.load(User.class, id);
>>
>> will throw an exception:
>> -------------------------------------
>> org.exolab.castor.jdo.ObjectNotFoundException: The object of type
>> model.User with identity 1,001 was not found in persistent storage
>>
>> After this, new user object could never be created:
>> -------------------------------------
>> User user = new User();
>> user.setName("Sean");
>> database.create(user);
>>
>> throws an exception:
>> -------------------------------------
>> org.exolab.castor.jdo.LockNotGrantedException: Lock is already existed for
>> the new oid.
>> at
>> org.exolab.castor.persist.LockEngine$TypeInfo.rename(LockEngine.java:1357)
>> at
>>
> org.exolab.castor.persist.LockEngine$TypeInfo.access$400(LockEngine.java:1038)
>> at org.exolab.castor.persist.LockEngine.create(LockEngine.java:496)
>> at
>>
> org.exolab.castor.persist.TransactionContext.create(TransactionContext.java:907)
>> at
>> org.exolab.castor.jdo.engine.DatabaseImpl.create(DatabaseImpl.java:374)
>> ...
>> org.exolab.castor.jdo.PersistenceException: Nested error: Key Generator
>> Failure. Duplicated Identity is generated!
>>
>>
>> I searched the Internet and can't find any solution to the exception. Do
>> you have any suggestion?
>> http://hypermail.linklord.com/castor-dev/2004/Apr/4119.html
>>
>> Thanks,
>> Sean
>
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