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JDO Doc
51

Constants.TX_READ_UNCOMMITTED

Static Field javax.jdo.Constants String TX_READ_UNCOMMITTED Transaction isolation level representing the ability to read uncommitted data. Since: JDO 2.2 See Also: PersistenceManagerFactory.getTransactionIsolationLevel() Transaction.getIsolationLevel()
JDO Doc
51

Constants.TX_REPEATABLE_READ

Static Field javax.jdo.Constants String TX_REPEATABLE_READ Transaction isolation level representing the requirement to read the same data in the same transaction. Since: JDO 2.2 See Also: PersistenceManagerFactory.getTransactionIsolationLevel() Transaction.getIsolationLevel()
JPA Doc
51

LockModeType.PESSIMISTIC_READ

Enum Constant javax.persistence.LockModeType PESSIMISTIC_READ Pessimistic read lock. Since: JPA 2.0
JDO Doc
50

Constants.OPTION_NONTRANSACTIONAL_READ

Static Field javax.jdo.Constants String OPTION_NONTRANSACTIONAL_READ "javax.jdo.option.NontransactionalRead" Since: JDO 2.1 See Also: PersistenceManagerFactory.supportedOptions()
JDO Doc
50

Constants.PROPERTY_NONTRANSACTIONAL_READ

Static Field javax.jdo.Constants String PROPERTY_NONTRANSACTIONAL_READ "javax.jdo.option.NontransactionalRead" Since: JDO 2.1 See Also: PersistenceManagerFactory.getNontransactionalRead()
JPA Doc
50

LockModeType.READ

Enum Constant javax.persistence.LockModeType READ Synonymous with OPTIMISTIC. OPTIMISTIC is to be preferred for new applications. Since: JPA 1.0
Forum
23

Error in reading Enum in JPA - Failed to read using reflection

with valid values of Status. This is all done with JPA/EJBs. However, at the time of reading the Object (findById), the system throws an error  com.objectdb.o.UserException: Failed to read the value
Forum
19

Master database switching to read-only mode, possibly caused by slave failure

, slave became unresponsive and the master switched to read-only mode. By the look of it the slave database failed first and possibly caused the master to switch to read-only mode. The sequence ... .java:133) at java.lang.Thread.run(Unknown Source) The reading continued to work
Issue
18

Query fails with failed to read

2-3 times per day we have a query that fails with:   Failed to read from file 'F:\Hummingbird ... : Failed to read from file 'F:\Hummingbird\Objectdb\db\coresystemdb.odb' [2018.08.09 10:41:30](2)class ... store.file] LocalFile.read error: 0, 52076077056, 2048 [2018-08-17 19:14:41 #5 store.file
Forum
18

Failed to read DB file while online backup is running

Hi, it happened already few times (seemingly randomly), that some db operation (read and also write ... ._JdoUserException: Failed to read from file '/path_to_db/dbFile.odb' NestedThrowables: java.io ... to read from file '/path_to_db/dbFile.odb' NestedThrowables: java.lang.NullPointerException