Hello
I encountered some problems with the locking mode "db-locked".
I use this, in order to exclude that another application outside castor has
concurrent access to my loaded objects.
If I use this flag, I unfortunately receive an error. As soon as my object
is once contained in the Cache, the renewed loading failes.
I receive the following error message:
org.exolab.castor.jdo.PersistenceException: Lock conflict: attempt to load
object of type Test2 with identity 20010815140531026142000000 in two
different
at
org.exolab.castor.persist.TransactionContext.load(TransactionContext.java:47
6)
at org.exolab.castor.persist.ClassMolder.load(ClassMolder.java:694)
at org.exolab.castor.persist.LockEngine.load(LockEngine.java:355)
at
org.exolab.castor.persist.TransactionContext.load(TransactionContext.java:49
1)
at org.exolab.castor.persist.ClassMolder.load(ClassMolder.java:717)
at org.exolab.castor.persist.LockEngine.load(LockEngine.java:355)
at
org.exolab.castor.persist.TransactionContext.load(TransactionContext.java:49
1)
at
org.exolab.castor.persist.QueryResults.fetch(QueryResults.java:219)
at
org.exolab.castor.jdo.engine.OQLQueryImpl$OQLEnumeration.hasMore(OQLQueryImp
l.java:569)
at
org.exolab.castor.jdo.engine.OQLQueryImpl$OQLEnumeration.hasMore(OQLQueryImp
l.java:552)
at TestTest.view(TestTest.java:119)
at TestTest.main(TestTest.java:47)
If I switch the Cache off, i.e. cache-type="none" this error doesn't occur.
To get around this, I will use now only the cache-off, so I have at least
the desired behavior that the object is loaded from the DB, instead to get
the copy from the cache.
I do need the db-locked access only for one class but have to turn the cache
off not only for this class but for the base class too. Unfortunately *all*
my persistent objects extend this base class but they would like to use
access mode "shared".
The error occurs after my past experience, if a back-reference (element of
a list - >container) must be resolved.
Is this error well-known or shall I mail you an example for testing ?
Many greetings Katrin <<testmap.xml>>
testmap.xml
