ObjectDB Database Search

WORM (Write once read many) support

Internal ObjectDB error by read the primary key

Have read read the documentation on optimistic locks, still not sure how to deal ... . But you can disable optimistic locking in the server configuration .   support Support read the documentation ... - since someone can change the object just after the refresh . In that case - use pessimistic locks. support

create the readings in one call and I try to read them in another call. I checked the database and all the entities are created (document and readings ) but when I try to get the collection of readings null is returned. I have tried to clear the entity manager in the second call to make sure the reading

the persistence provider when a pessimistic locking conflict occurs that does not result in

no longer exists in the database. Thrown when EntityManager.lock is used with pessimistic locking is used

pessimistic locking only? I've tried various xml configurations, and also various transaction ... , that setting is for optimistic locking. My question was about pessimistic locking (specifically, pessimistic write locking). Your documentation seems unclear about that.   dmoshal David Moshal

Probably a simple answer for someone who's been using ObjectDB for awhile: I'm reading objects ... .getSelectedValue(),       LockModeType. PESSIMISTIC _WRITE); . . } //doEdit ... , LockModeType. PESSIMISTIC _WRITE);         System.out.println

guess I should read doco more. I ran into the same error from a pessimistically locked entity (global ... . Also have the Explorer open Questions: a) what is it about? b) is there a setting for pessimistic mode? In my app ... on pessimistically tracked entity.   Modified conf file, and got the test case working perfectly.  

and roll back. T1 T2 ---------------------------------------------------------- READ (A) version=1 value=0 | READ (B) version=1 value=0 | | READ (A) version=1 value=0 | READ (B) version=1 value=0 | B ... Thread[Thread-2,5,main] READ   A1 version=1 value=0 Thread[Thread-2,5,main] READ   B2 version=1

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.PessimisticLockScope NORMAL This value defines the default behavior for pessimistic locking. The persistence provider must lock the database row(s) that correspond to the non-collection-valued persistent state of that instance

; support Support A possible solution (which is currently not implemented) is to use pessimistic locking ... want to use Pessimistic Lock as a way of enforcing a cluster wide singleton of services, a pessimistic ... adds automatic release of pessimistic locks on client-server disconnection. The locks

.InternalException: Error reading UTF string at com.objectdb.o.BYR.U(BYR.java:1217) at com.objectdb.o.BYR.U(BYR.java ... ) WARNING: javax.ejb.EJBException: Error reading UTF string at com.sun.ejb.containers ... .run(Thread.java:829) Caused by: com.objectdb.o.InternalException: Error reading UTF string at com

.URIReader. read (URIReader.java:84)         at image.URIReader.main ... 613) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:277) at image.URIReader. read (URIReader.java:82 ... Your code contains file reading operations that are not related to ObjectDB and may cause the problem

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.CacheStoreMode USE Insert entity data into cache when read from database and insert/update entity data when written to the database: this is the default behavior. Does not force refresh of already cached items when reading from database. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.CacheStoreMode REFRESH Insert/update entity data held in the cache when read from the database and when written to the database. Force refresh of cache for items read from database. Since: Jakarta Persistence (JPA) 1.0

in the database changes between reading the state of an entity instance and attempting to update or

Currently the slave servers are limited to read only (it is indicated at the beginning of the page ... and read to any node (and maybe such a solution will be included in a future version of ObjectDB ... that when master goes down application can only reads data? And the second question: on which level

option, which I missed on java client side? I read https://www.objectdb.com/java/jpa/setting/ssl ... /sun.nio.ch.SocketDispatcher.read0(Native Method) at java.base/sun.nio.ch.SocketDispatcher. read ... .implRead(NioSocketImpl.java:309) at java.base/sun.nio.ch.NioSocketImpl. read (NioSocketImpl.java:350

Would this be correct?     public List read () { EntityManagerFactory emf ... . support Support The only way to do this one:   public List read () {} Is by using a Query? i.e ... you lines of code. support Support Would this be correct?     public List read

. com.objectdb.o.UserException: Failed to read from file 'C:\Users\CMOORE~1\AppDat a\Local\Temp ... to read from file 'C:\Users\CMOORE~1\AppData\Local\Temp\ objectdb_3126483439234298180\DoctorSection ... is locked for reading Try it a again also when the file is locked for reading /writing. These checks

to commit transaction: Attempt to commit a transaction in read only mode[ObjectDB 2.8.2] javax.persistence.RollbackException Failed to commit transaction: Attempt to commit a transaction in read ... ! objdbuser In ObjectDB clusters slave databases are read only (see this documentation page

.class.getClassLoader()); I read in the ObjectDB website that we can change the temp directory using ... ;system property or ..... I m using fileName.odb file to store the objects and reading objects from ... am using objectDb 1.x. i am able to set the temp folder path. When i try to read the odb.file

pessimistic exceptions, but it is more efficient to remain with optimistic locking (which is the default

? Yes, if it has not been locked with pessimistic WRITE. , and will it see the old attribute? Yes

/objectdb.jar Some of projects can read the DB, but others can not read or write the DB. Exception in ... EntityManager em = SingleManager.getEntityManager(); public void read (){   int iCnt = 10;   ... ");   SingleManager.clearDB("URI");   new PageTest(). read (); } } the version 2.2.8_6 can not

availability and fault tolerance? Unless the application is read only and no write, as long as ... ; So basically both read and write will always be going to the master and the load ... , not even read load) - Not for Read +Write failover?   Thank you. Trianglehead Json Error Not

I came across a very weird behaviour i cant explain. When trying to read from a local DB (file on pc) the query results are only fully read back when debug printing the result contents before ... part commented out, the result doesnt contain all the data. The field requirementList is read back as null

to do it: [ObjectDB 2.6.5_04] javax.persistence.PersistenceException Failed to read from file '/tmp/objectdb ... .EventDispatchThread.run(EventDispatchThread.java:82) Caused by: com.objectdb.o.UserException: Failed to read from ... (JpaQuery.java:779) ... 39 more [ObjectDB 2.6.5_04] javax.persistence.PersistenceException Failed to read

is reading /writing the files. The tests are showing that the HW RAID5/6 of HDDs deliver comparable ... files, so in fact it means sequential reads /writes. If it is tested on small files the speed is getting ... ObjectDB read /write the DB files by large chunks and then it parses it within the RAM (so it would mean

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.CacheRetrieveMode USE Read entity data from the cache: this is the default behavior. Since: Jakarta Persistence (JPA) 1.0

it? Another possibility is that your configuration file is not read - you can check it by putting invalid ... is that your configuration file is not read - you can check it by putting invalid content in the configuration ... not being read -  I mangled the tag and get the same behavior, with no exceptions

4 requests 1. save entity 2. read an existing entity, add onetomany relation 3. read an existing entity, add another onetomany relation 4. read entity, get relations. i have the feeling this is not ... me to call entityManager.getTransaction().begin()/commit() and i also can not set the isolation to READ

for more than one request, failure to read a full request by the server can cause next requests to fail ... multiple times during the day: com.objectdb.o.InternalException: Error reading UTF string    ... issues about getting this exception in other cases. The "Error reading UTF string" exception

disk storage consists of a RAID5 of 4x 2TB SAS-SSDs and brings a write and read performance of 4 ... JVM heap size is 8GB the process should be able to use 16GB. If you see I/O READ operations ... read activity when the system is warm - you shouldn't if the entire database is cached

.handleOrphans(Entity.java:170) This happens when I try to read a @OneToMany list collection ... Ritter doppelrittberger Markus Ritter The stack trace indicates an unexpected object type on reading ... to read could be read before without any issues so it seems that the database file gets corrupted

and have a number of applications connecting to it. I realize that I'm able to stand up read only replications and add them to my persistence unit but being able to read and not write is a condition that can't last ... layer). If after reading the other thread you have a clear picture of how you think ObjectDB

. One is to stupidly commit the transaction after a certain number of read accesses (every 10000 read access ... updates to the database or it is read only. If it is a read only operation, do you really need commit ... for posting questionable code snippets. I have repaired it. In this scenario the data is only read

however, married to JDO, although I think it's good. Its lack of true (before commit) pessimistic locking ... (above). I've also since starting with JDO, a couple of weeks ago, read most of the ObjectDB JPA

Added support of JPA UPDATE and DELETE queries ( issue #12 ). Added support of pessimistic lock timeout ( javax.persistence.lock.timeout ). Added implementation of the getParameters method. Added exception on pessimistic locking retrieval with no active transaction. Improved support of entity

.socketRead0(Native Method) at java.net.SocketInputStream. read (SocketInputStream.java:129) at java ... (BufferedInputStream.java:256) at java.io.BufferedInputStream. read (BufferedInputStream.java:313) at com ... . The message size going into the queue is not large - around 4k at most. Each read /write operation

Added JPA XML validation schema files to Maven/JEE objectdb.jar. Added automatic release of pessimistic locks on client-server connection failure. Fixed an OptimisticLockException bug on commit after flushing a removed modified entity object. Fixed a  NullPointerExeption on new index building

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

and LockMode set to PESSIMISTIC _WRITE. This results in the exceptions below. Could you advise on the errors

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.

  The Exception: Failed to read from file 'C:\Users\DEVELO~1\AppData\Local\Temp\objectdb ... .PersistenceException Failed to read from file 'C:\Users\DEVELO~1\AppData\Local\Temp\objectdb ... : com.objectdb.o.UserException: Failed to read from file 'C:\Users\DEVELO~1\AppData\Local\Temp\objectdb

. Read .doGet (115 ): Failed to commit transaction: Unexpected database state: BTree -152 is not found ... ) at cl.intelidata.servlet. Read .actualizaLectura( Read .java:143) at cl.intelidata.servlet. Read .doGet( Read

for a query (just read , no update) but it fails with the error below. The code I'm using is (user & password ... is: [ObjectDB 2.2.8] javax.persistence.PersistenceException Attempt to update types in read ... to update types in read only mode at com.objectdb.o.MSG.d(MSG.java:61) at com.objectdb.o.SHN.ab(SHN