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ObjectDB version 2.5.1

deadlock on Schema Update during Multithreading activity (issue #1139). Fixed a bug in loading mapped
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ObjectDB version 2.5.3

Version 2.5.3 Added support for casting from boolean to int in queries. Changed default value of . Fixed a critical Explorer bug that interferes with queries on enum fields. Fixed a multithreading conflict (missing synchronization) in the JPA metamodel API. Fixed implementation of casting (as) in criteria queries.
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Explorer and multi-thread

When I use explorer.exe to browse the database in objectdb, eclipse tells me another app occupy it, then how can objectdb support multi-thread? Multithreading refers to the ability to use the same database in multiple threads of the same process (same JVM) simultaneously. This is supported by
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internal object DB locking in an embedded multi threaded application

Hi, we are using Embeded objectDB 2.4.4_06 in a highly multithreaded concurrent manner and we have noticed a performance problem in our application that seems to be attributed to ObjectDb's internal locking. When profiling our app in JVisualVm we notice a large number of threads are blocked
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InternalException: null

has its own connection to the DB.  When running the app without the multithreading, no errors are coming
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Issue with orphanRemoval and multiple EntityManagers

multithreaded application). When I create a child entity in one transaction and then remove it in
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Multi-thread access to single EM's entities

on the observable behavior of multithreaded code. When I run this example and examine the database, the entity
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Negative snapshot user count

in a multithreaded application. A transaction snapshot may be released more than once and the result
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Query and commit simultaneously

Is it possible to query and commit on the same persistence manager (i.e. same odb file) at the same time? Multithreading is fully supported by ObjectDB, so you can query and update the database at the same time using multiple threads. However, if all the threads share the same EntityManager
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Query vs Extent for retrieving data

.option.Multithreaded both set to true, but that's it. I should note that I tried moving the print loop