db4o Developer Community

Hello. I have some problem with db file.I'm using db4o in my application written in Java.User which uses it broke db file. I know that he updated application (replaced .jar file).New version of app has the same version db4o and the same settings.What was the immediate cause of this problem I don't know. But I have assumption, that he replaced .jar ...

 Hi, I tried using the db4o defrag functionality on my database file, but sadly it failed. I can't make any sense from the exception. My log file looks like this: 06-Oct-2008 18:07:18 tvadb.database.Db4oFileDefrag openDatabaseINFO: Getting default db4o Configuration...06-Oct-2008 18:07:18 tvadb.database.Db4oFileDefrag openDatabaseINFO: ...

Hi, I have another issue with the client-server environment. It seems that the connection between my client and the db4o server are never actually closed. This soon causes a ''Too many open files'' Exception on my system. I'm using the db4o 6.4 version 6.4.54.11278, both the client and the server run on the same machine (all using Java 1.6 / ...

Hi, I've been evaluating db4o for a client-server environment for the last few weeks. I've been running into a few problems, but could solve most of them using the tutorial, the db4o reference or by looking up in the forum. But I now have an issue that may or may not be a bug, so I thought I'd ask directly for some advice. Of course it could very ...

Dear Forum, Having: ObjectContainer containerA= Db4o.openClient(REMOTE_CREDENTIALS_REMOVED); ObjectContainer containerB=objectserver.openClient();   Doing now: ReplicationSession replication = Replication.begin(containerA,containerB);    Brings: Stack Trace: java.lang.ClassCastException: ...

Hi, I am a newbie on both db4o and relational-db. My project require a database to store about 1000 users info and runs on Java ME CDC1.01.My first solution is using Hsql-cdc-port version. It takes about 162 seconds to insert 1000 records.Then, I tried to use db4o-6.4, with the same data, it takes about 247 seconds! It is too bad to ...

Thanx Brett, As it usually happens, I found the solution ( ExtObjectContainer#isClosed()) 5min after I posted the initial message, but I wanted to try to solve the whole problem and post the overall solution or hint. However, I still haven't been that lucky to find the solution.Here is the code: ==============================  final class ...