ObjectDB Database Search

, or if ObjectDB is doing some sort of queue/ locking  whose depth is determined by this setting

folder, however I've got a few questions I couldn't find answers for: How will locking take place

MBs). support Support Thanks. It solved the dead lock . edy_at_ssn Edy Oey

based databases (in server mode the database is locked so drop can't be used). The only method I've

? 

Could you please clarify how we could avoid it? This has really locked our work for a couple of days

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

I'm sometimes getting this exception.  Is there a simple answer to why it's occurring?  (It could take some time to produce code that results in this exception reliably). Caused by: java.io.FileNotFoundException: /tmp/objectdb/tmp/objectdb_1252962966569709153/ lock .lck (No such file or

I have facing a problem when i am executing the query first time, Please find the stack trace below java.lang.InterruptedException at java.util.concurrent. locks .AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1301) at java.util.concurrent.Semaphore.acquire

because JPA was more popular and thus receiving more support, and JPA object locking was more capable

:745) Xmx is 4GB. This is how the tmp directory looks like after the error occoured: 0 lock .lck 4,0K

cannot access the file because another process has locked a portion of the file at java.io.RandomAccessFile

. But if you don't need transactions, lock management, durability and recovery, advanced queries, etc.  - maybe

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

In order to speed-up everything I would like to add log entities related to a device without touching ( locking ) the device entity. How can I do this with ObjectDB using @JoinColumn(name = "device") because I don't have a back reference from log to device! ----- @Entity public class Device

Benjamin Lorenz The exception indicates a file locking conflict. In embedded mode the database

to get transaction " + ov.getId());         // edit all locked objects  

is not locked - I do this anyway in the tests ...   Thanks.     JFK John Francis Build 2

again as shown below:   [ObjectDB 2.4.2] java.lang.IllegalArgumentException Attempt to lock a new (non

; Name: ODB-WeakRefPurger State: WAITING on java.lang.ref.ReferenceQueue$ Lock @6069d1ca Total blocked

objects in different entity managers and threads. Locks are used to avoid conflict in updating the same object as the same time. support Support

/ Lock ?" "How Should I Configure objectdb.conf to Obtain 256KB Disk IO Requests and Maximize Shared

them automatically (in some specific cases, it is possible that some locks will not be released

is locked for a single process. Use client-server mode or embedded-server mode to enable concurrent

O'Hare It seems as a separate issue. Maybe related to pessimistic locking . Can you provide a test

instead of Long ) and then updated. Fixed retrieval with pessimistic lock to bypass cache and to force refresh.

UnsupportedOperationException  error message. Fixed a pessimistic lock timeout bug ( issue #520 ). Fixed

that is somehow locked . Closing the entitiy manager should free the memory - but freeing no longer objects

lock exception of the removed entity.   If this operations on the entity are executed in

Added support for using ObjectDB with JBoss AS 6.0 / 6.1 . Fixed several bugs in handling eager fetch. Fixed a pessimistic locking bug . Fixed a bug in using primary key fields in queries. Fixed a bug in queries on deleted objects before commit / flush.

. 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

on (a java.lang.ref.ReferenceQueue$ Lock )         at java.lang

engine (not using one server process), thus bypassing ObjectDB internal file lock protection

#2 reflects a locked database file (due to a failure during close) and not a corrupted database

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

. locks .AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1301

Fixed a bug in using AS in SELECT NEW (breaks some Spring Data JPA queries). Fixed a bug in tracking changes to new collections after flush ( issue #2640 ). Fixed a StackOverflowError on no access permission to objectdb.conf ( issue #2643 ). Fixed a bug in managing pessimistic locks after using

OPTIMISTIC_FORCE_INCREMENT . Fixed a bug in optimistic locking on find by using LockModeType.WRITE . Fixed

a online backup file lock problem . Fixed a bug in managing a new entity after an attempt to find it in