Hi,
I am developing an application, that operates on multiple entity
groups in multiple datastore transactions.
I first create a PersistenceManager and open a transaction on it.I
make an object persistent using this transaction, but I do not commit
it. After this I create a new PersistenceManager with a transaction
from the same factory, I make persistent an object to a different
entity group. Again I do not commit. At the end I will commit the
transaction after each other.
There is a foreign key relationship between the 2 objects (I store the
Object with primary key first).
The second transaction fails to commit with an Exception:
NestedThrowablesStackTrace:
java.lang.IllegalStateException: Attempted to deregister a transaction
that is not currently registered.
at
com.google.appengine.api.datastore.TransactionStackImpl.remove(TransactionStackImpl.java:
61)
at
com.google.appengine.api.datastore.TransactionImpl.commit(TransactionImpl.java:
71)
at
org.datanucleus.store.appengine.DatastoreTransaction.commit(DatastoreTransaction.java:
61)
at
org.datanucleus.store.appengine.DatastoreXAResource.commit(DatastoreXAResource.java:
88)
(I do not get this error, if I leave the persistence of the object out
from the 2nd transaction.)
I was running this code both from JUnit Tests and on Local App Engine
instance.
This was working with 1.2.6 or 1.3.0 but not with 1.3.2.
I also have a JUnit Test to test concurrent modification, I used to
get JDOCanRetryException on concurrent changes, but now with the new
version I am getting:
java.util.ConcurrentModificationException: too much contention on
these datastore entities. please try again.
at
com.google.appengine.api.datastore.DatastoreApiHelper.translateError(DatastoreApiHelper.java:
37)
at
com.google.appengine.api.datastore.DatastoreApiHelper.makeSyncCall(DatastoreApiHelper.java:
63)
at
com.google.appengine.api.datastore.TransactionImpl.makeSyncCall(TransactionImpl.java:
42)
at
com.google.appengine.api.datastore.TransactionImpl.makeSyncCall(TransactionImpl.java:
56)
at
com.google.appengine.api.datastore.TransactionImpl.commit(TransactionImpl.java:
66)
Has anything changed in 1.3.2?
Please help.
Regards,
Adam
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