About number

api-jpa

javax.persistence.TransactionRequiredException

Thrown by the persistence provider when a transaction is required but is not active.(Exception of JPA)

 
api-jpa

javax.persistence.RollbackException

Thrown by the persistence provider when EntityTransaction.commit() fails.(Exception of JPA)

 
api-jpa

javax.persistence.NoResultException

Thrown by the persistence provider when Query.getSingleResult() or TypedQuery.getSingleResult()is executed on a query and there is no result to return.(Exception of JPA)

 
api-jpa

javax.persistence.NonUniqueResultException

Thrown by the persistence provider when Query.getSingleResult() or TypedQuery.getSingleResult() is executed on a query and there is more than one result from the query.(Exception of JPA)

 
forum_thread

Suspected memory leak

Hi, We are running soak testing with Object DB and it is showing signs of memory leak: used memory is growing overtime until Object DB JVM fails with OutOfMemoryException. Object DB is running in a separate JVM. All the config is attached. We are continuing to investigate this and will create memory dump next time this happens. In the meantime, could you please check if there is anything wrong with our configuration? Kind regards, Natalia. ... The <processing> element - try reducing the number of threads and the cache size (notice that this setting is per open ...

 
doc

java.lang.RuntimeException

(Exception of java.langException RuntimeException)

 
forum_thread

Fetching Collections Puzzle

I am working on a project where I need to travel through a massive graph of objects. One of the main entity is the Node which is shown below. class Node { Node parent List<Node> children Node rightSibling Node leftSibling int rank } I have the following issues/doubts ... that JPA spec if i recall correctly does not specify the number of collections you can fetch through a query but in practice  I ...

 
manual

Storing JPA Entity Objects

Explains how to use JPA to store (persist) entity objects in the database.... ). Batch Store Storing a large number of entity objects requires special consideration. The combination of the ...

 
forum_thread

Soft Reference Object Cache Recommendation

(Trying again.  Last post, ~50 minutes to compose, failed, possibly due to an attachment upload size limit being exceeded before the post attempt.  =(  ) ... cache="1mb" max-threads="10" />) is a HINT to the number of PAGs that may be created.  I also understand that those PAGs are ... commit?) What I don't understand is that the number of PAGs seems to continue growing well beyond the requested limit.  ...

 
forum_thread

lockfiles in client/server mode

i have an objectdb server running on localhost as user "objectdb", spawned like so: java -server -cp /usr/local/share/objectdb/objectdb.jar: com.objectdb.Server -conf /etc/objectdb/objectdb.conf start it has naturally created and taken ownership of /tmp/ObjectDB. #1 2012-04-05 21:36 i have an objectdb server running on localhost as user "objectdb", spawned like so: java -server ...