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OptimisticLockException

(it is also attached). This new reference will contain the updated version field. This is what I'd look ... that the exceptions do not indicate a problem in your application (i.e. that you update an object based on an old retrieval, overriding another recent update). Additional information on optimistic locking
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Query becomes slower on moving from ObjectDB 1.x to ObjectDB 2.x

" Does it mean that, before conversion, i need to do the following steps 1. Update the package.jdo ... the second defination and tried the following steps 1. Update the package.jdo with an index defined 2 ... above. You may need to run the Doctor to build the index. hmmm.. i did the following steps 1. Update
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Recommendation - concurrent access multiple class v

servers are taken offline, updated, then put online. The remaining 2 servers are also updated.  --- I can't update all 5 of them in the same time, because it must be no downtime for the current
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Should I be able to persist a JFrame (or gui components in general)?

possible, would be appreciated.   Update...I got a bit eager trying this without paying attention ... at this point. I have some more experimenting to do. Last update...promise. I discovered that (as I ... would be appreciated. > Last update...promise. I discovered that (as I should have understood from
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Show Sql/Jpql

also want to see insert, update and delete It may be a good idea to log queries as strings in TRACE ... , Update and Delete operations (except delete/update queries). You may log these operations by setting
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Some details about db behavior

. When that A instance is removed you should also update the reference from B accordingly ... will be updated to reference a null value automatically on the next time it is loaded or refreshed from the database. But in both cases, portable JPA applications are expected to update both sides
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1

Spring Transactions (@Transactional) within ObjectDB

to get the reference. Thanks for your help.   Updates to objects are always available in the same ... and by Spring Data. If queries are involved, then it is possible to miss recent updates ... . It is less efficient but it should guarantee that queries in a transaction will reflect also uncommitted updates
Issue
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stress test -> com.objectdb.o.InternalException: null

, excepting that persistence.xml was set to use ObjectDB in embedded mode. Thank you for the updates ... .getTransaction().commit();         em2.close();                 em1.createQuery("UPDATE TestEntity ... ;     } } It is caused as a result of running an UPDATE query on uncommitted flushed changes in some circumstances
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TimeSeries and ObjectDB

, then add the new points, and then commit the whole timeserie again. I looked at Update queries ... it terms of space and retrieval speed but may be more expansive in updates. See a recent forum thread ... above, it depends on your specific application (e.g. frequency of retrieval / updates), what is the best
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1

use of Singleton into tomcat

userToUpdater){ //code for update into db }   but i ask if the metods for update, write . read , create Users ... thread-safe. but  how it work the methods into singleton for read, update, write at db if 2 client