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issue

JPA Composite Key make Object Db throws "Unexpected exception (Error 990)"

Hello Object Db community :) I am using this wonderful library and I caught a strange exception while testing the "composite key" feature in JPA. Let's see what I am doing : @Entity public class Book {     @EmbeddedId BookId id; } @Embeddable Class BookId {     Integer bookIdCountry;     ECountry country; } My BookId contains 2 attributes: One Integer and one enum. Bug Version: 2.4.0 Priority: Normal Status: Fixed Replies: 3 Type:  Bug ...

 
issue

[ObjectDB 2.6.7_04] Unexpected exception (Error 990)

Since Version 2.6.7_04 we get the following NullPointerException at Query execution: ... fix is not working, but build 2.6.7_05 includes some addition that maybe can help. ObjectDB Support ...

 
forum_thread

best practice for DB recovery

Hi, I'm trying to come up with the best approach for supporting some kind of hot standby for my master DB. ... or is there a more standard way for doing this? In addition, what is objectdb approach/roadmap regarding the support of hot ...

 
issue

Query execution causes an unexpected internal exception (Error 990)

We have the following exception, why our query fails? ... log file. Could you please post these lines? In addition, please check your database with the ObjectDB Doctor, and post the ...

 
issue

Weird issue with variable naming

hi, ... is involved in selection and order by. Removing the addition of order stuff solves the issue of double naming though doesn't ...

 
forum_thread

Java 6/7 Performance Comparison

Hey, I've been using ObjectDB for a small scale home project to gain some familiarity before proposing it in a commercial project at work. What I've noticed though is that when using objectdb in embedded mode based on the console tutorial, there seems to be a bit of a performance gap running the same code between Java 6 & 7 Tracing it through I can see the bottle neck seems to be at the creation of the entity manager and I was wondering if there are any additional configuration options I may have missed while running under java 7. #1 2014-03-06 14:31 Hey, I've been using ObjectDB for a small scale home project to gain some familiarity before proposin ...

 
forum_thread

Eager Fetch is not stable for collection or map types?

Hi, thanks very much for your helpful software. The problem is the storage of collection or map types is not stable, we lost them sometimes after JVM restarted. Eager fetch is properly set.And we still found that the storage is stable when we not use generic, such as "private List users = new ArrayList();" instead of "private List<User> users = new ArrayList<User>();".   The code about entity and fetch is: #1 2011-11-22 12:19 Hi, thanks very much for your helpful software. The problem is the storage of collection or map types is not ...

 
manual

[ODB1] Chapter 8 - ObjectDB Server

An ObjectDB server can manage one or more databases. Databases that are managed by a server can be accessed by multiple processes simultaneously. In addition, the server supports accessing these databases from remote machines by TCP/IP. More details about client server mode vs. embedded database mode are discussed in Section 1.2.... can be accessed by multiple processes simultaneously. In addition, the server supports accessing these databases from remote machines by ...

 
forum_thread

ODB should auto-restart if it detects it's necessary

Hi! I find very tricky the need to restart ObjectDB server after schema modifications in a distributed environment. Moreover, not doing it does sometimes trigger ugly errors, which mean application downtime. It might be very useful to have an additional feature (that could be enabled/disabled in objectdb.config) that each time ObjectDB detects a schema change that requires restart, it should automatically restart itself. This way we save a lot of headaches from our dev. ops. Currently we have to manually do: #1 2014-03-29 08:33 Hi! I find very tricky the need to restart ObjectDB server after schema modifications in a distributed en ...

 
forum_thread

Unexpected NoSuchFieldError exception

Hi, suddenly running into a number of issues:   1) no-arg constructor (error 352) 2) java.lang.NoSuchFieldError: __odbTracker 3) Attempt to start a transaction while another transaction is running. In each case, I've found it difficult to figure out where to find the right documentation. Below is an example that has #1 and #2 together. #1 2017-02-24 02:45 Hi, suddenly running into a number of issues:   1) no-arg constructor (error 352) 2 ...