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Have read read the documentation on optimistic locks, still not sure how to deal ... : Optimistic lock failed for object   dmoshal David Moshal perhaps I should explain the problem, which is that the optimistic lock exception fails repeatedly once the object is modified from

.currentTransaction()? 3) Does it lock at transaction.begin() if optimistic =false?  4) Does it lock at transaction.commit() if optimistic =true? 5) ObjectDB 1.0 Manual (Support Knowledge Base ObjectDB 1.0 ... optimistic =true, perhaps implying optimistic =true now has less overhead either way.  Maybe a shared

the entity from the database. After commit the transaction an exception is caused with optimistic ... flushing changes to the database. You may also  disable optimistic locking checks   ... plugins. This leads to the optimistic lock exception. But the ObjectDB throws the changes of the entity

._OptimisticLockException: Optimistic lock failed for object model.UserSession#28 (object has version ... be wrong here. EDIT: Merge will attach Willks William Optimistic locking is enabled by ObjectDB automatically even if no version field is defined. You can disable optimistic locking checks  

: javax.jdo.option. Optimistic =false javax.jdo.option.NontransactionalRead=true javax.jdo.option ... we use the following options in DB2: javax.jdo.option. Optimistic =true javax.jdo.option ... .jdo.option.RestoreValues=false The DB2 returns the message " Optimistic lock failed for object" or

:                 dmoshal David Moshal note: optimistic locking is off dmoshal David Moshal update 1: problem persists if optimistic locking set to true in

directly to database update operations, bypassing any optimistic locking checks. Portable applications

.PersistenceManagerFactoryClass", "com.objectdb.jdo.PMF"); properties.setProperty("javax.jdo.option. Optimistic ", "true

). Thanks again for the prompt answers. In the meantime, I'll use an optimistic lock and fail

.CheckCacheThenDatabase); /* q.setLockMode(LockModeType. OPTIMISTIC ); */ try { java.lang.Object r = q.getSingleResult

(included in the download). Added support of disabling optimistic locking exceptions . Added support

a different update of that specific object using the first EntityManager , due the default optimistic

._OptimisticLockException: Optimistic lock failed for object application.model.Paygrade#184 (object

this on slave after step 3: com.objectdb.o.UserException: Optimistic lock failed (see multiple nested

) @GeneratedValue private Long id; /** * Version of object, supporting optimistic lock */ @Column (name = "opt

that this happens when an optimistic lock exception is thrown during commit, and failed (locked ... hgzwicker Hans-Georg Zwicker Which trace? The log just shows locations of optimistic lock exceptions ... when there is an optimistic lock exception on a large object (= ~2KB). Assuming you have ObjectDB 2.7.2

(entity version = 1) and committed, during the commit an optimistic lock exception is thrown. The version ... : Failed to commit transaction: Optimistic lock failed for object com.btc.ep.base.bl.internal.entities ... : com.objectdb.o._OptimisticLockException: Optimistic lock failed for object com.btc.ep.base.bl

also 2.7.1_03 and with this one we get an optimistic lock exception without enhancement. If we enhance ... ;an optimistic lock exception. More information and possibly a test case that demonstrates the exception ... of the optimistic lock exception and we fixed it in our code. From my sight of view this issue is fixed. btc_es BTC EmbeddedSystems

of entity classes ( issue #672 ). Fixed LockModeType. OPTIMISTIC ( READ ) by handling it as OPTIMISTIC _FORCE_INCREMENT . Fixed a bug in optimistic locking on find by using LockModeType.WRITE . Fixed

of connections specified in configuration. Fixed optimistic lock exception on removing of a flushed modified

We use an OSGi environment and we have three OSGi plugins.   In plugin A an entity is loaded and the entity is passed to plugin B. Plugin B changes an attribute on the entity. Plugin C removes the entity from the database. After commit the transaction an exception is caused with optimistic

lock free Synchronization ( issue #2327 ). Fixed a regression optimistic lock exception bug

. It solves another issue (unexpected optimistic lock exception) but you may want to check if it also solves this issue. support Support

Added Online Backup utility ( issue #16 ). Added Master-Slave  Replication / Clustering (issue #17 ). Added a PDF version of the ObjectDB manual (included in the download). Added sample (tutorials) Maven projects (included in the download). Added support of disabling optimistic locking

ObjectDB manages automatic entity versioning (for optimistic lock purposes). Every entity object modification is reflected by a new version number. Naturally, previous values in the entity object that are overridden by new values are discarded. Some applications may benefit from the ability

will be persistent-clean. If there is an optimistic transaction in progress, the returned instance

instances read in data store transactions; and persistent instances modified in optimistic transactions

JDO Method in javax.jdo.PersistenceManager void refresh (   Object pc ) Refresh the state of the instance from the data store. In an optimistic transaction, the state of instances in the cache might not match the state in the data store. This method is used to reload the state