About null

issue

Exception on query

[2014-02-14 11:38:47 #1 *] [ObjectDB 2.5.4] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.7.0_17 (on Windows 7 6.1). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb.o.InternalException at com.objectdb.o.InternalException.f(InternalException.java:236) at com.objectdb.o.STA.K(STA.java:339) at com.objectdb.o.ENT.E(ENT.java:533) at com.objectdb.o.ENT.N(ENT.java:681) at com.objectdb.o.LDR.F(LDR.java:593) at com.objectdb.o.LDR.E(LDR.java:470) at ... null com.objectdb.o.InternalException at ...

 
forum_thread

Open a db file causes an error

We get the following error, if we open a db file. We use ObjectDB 2.6.8. What is wrong? ... is wrong? Caused by: java.lang.NullPointerException: null at com.objectdb.o.IXN.<init>(IXN.java:136) ~[na:na] at ...

 
forum_thread

Low performance when getting grove roots

Hi, I have a grove-like structure of objects, every objects referencing its parent. Root objects have null as the value of this parent reference. To find the roots I execute a query. If the number of objects in the tree is significant, this query takes almost forever, it seems ObjectDB loads all objects on the DB to test their parent field value. Id there a way to force ObjectDB to create an index for this field? Regards, Vladimir ... every objects referencing its parent. Root objects have null as the value of this parent reference. To find the roots I execute a ...

 
api-jpa

javax.persistence.GenerationType

Defines the types of primary key generation strategies.(Enum of JPA)

 
api-jpa

valueOf(name)

Returns the enum constant of this type with the specified name.(Static Method of javax.persistence.CascadeType)

 
api-jpa

getGroupRestriction()

Return the predicate that corresponds to the restriction(s) over the grouping items, or null if no restrictions have been specified.(Method of javax.persistence.criteria.AbstractQuery)

 
issue

[ObjectDB 2.6.7_04] Unexpected exception (Error 990)

Since Version 2.6.7_04 we get the following NullPointerException at Query execution: ... java.lang.NullPointerException: null java.lang.NullPointerException at com.objectdb.o.MMM.aj(MMM.java:1147) at ...

 
api-jdo

jdoNewObjectIdInstance(o)

Create a new instance of the class used for JDO identity, using the key constructor of the object id class.(Method of javax.jdo.spi.PersistenceCapable)

 
api-jdo

getRegisteredErrorHandler()

Return the registered instance of ErrorHandler.(Static Method of javax.jdo.spi.JDOImplHelper)

 
forum_thread

UserException: Invalid configuration in 'internal' - Check permissions

Hi all,   I have a master/slave code so that each slave reads a subset of points of the same database. ObjectDB entities do not allow serialization and so I have sent, to each slave, the file path. With such information I have tried to create an entityManager, in each slave, as follows: EntityManagerFatory entityManagerFactory = Persistence.createEntityManagerFactory(filePath); EntityManager = entityManagerFactory.createEntityManager(); However I get the following error ... is given as follows     <span> task null exception occurred: org.jppf.JPPFException: java ...