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forum_thread

Performance in large transactions

Hello, we have a performance problem when we use a large transaction. Let's do exactly the same in several transactions the ObjectDB works much faster. In our use case, we create many new entities and between the creations we call a select query. The execution of the query becomes slower at each iteration. (In the query, we search for an item of type Entity2. However, there is only one entity.)   Pseudocode for the fast and the slow solution FAST: #1 2015-03-03 15:07 Hello, we have a performance problem when we use a large transaction. Let's do exactly the same i ...

 
issue

ObjectDB BIRT Driver Update

The ObjectDB BIRT/ODA driver is an extension of the open source Business Intelligence and Reporting Tools (BIRT) that adds support of ObjectDB as a data source and JPQL as a data set query language. Feature Request Version: 2.6.6 Priority: Normal Status: Active Replies: 2 Type:  Feature Request ...

 
issue

InternalException

I'm getting a new InternalException (see below). No repeatable example as yet but will work on that and let you know as soon as we have one. If there's anything in the exception which could help us narrow down the problem please let me know. Bug Version: 1.04 Priority: High Status: Closed Replies: 9 Type:  Bug ...

 
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Master database switching to read-only mode, possibly caused by slave failure

We had a database failure causing a production outage. Both master and slave databases have failed, slave became unresponsive and the master switched to read-only mode. By the look of it the slave database failed first and possibly caused the master to switch to read-only mode. The sequence of events was: #1 2012-04-05 04:38 We had a database failure causing a production outage. Both master and slave databases have failed, slave became ...

 
issue

Server crash - Mismatch client-server protocol prefix

We've been having a problem where our ObjectDB server goes unresponsive every 2 days or so.  I've reviewed the server-side logs, and there are no events logged shortly before the crash.  Once the server gets in this state, it is unresponsive to bin/server.sh restart; I have had to reboot the entire server on which it's running.  The only recorded symptom is a client-side error (which fortunately gets auto-mailed to me): Bug Version: 2.5.2 Priority: High Status: Closed Replies: 4 Type:  Bug ...

 
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Attempt to execute a query using a closed EntityManager

Hi again! Suddenly, my app started to throw this exception. I would really appreciate some advices. #1 2013-06-02 16:40 Hi again! Suddenly, my app started to throw this exception. I would really appreciate some advices. ...

 
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Failover from Master to Slave

Good morning! I am interested in ObjectDB for a client project I am currently working on. In order to evaluate your tool I would like to know if your product has the ability to failover from a Master Database to a Slave Database and then recover back to the master when the master comes back online. I don't see any documentation about automatic failover.   Thanks Rich   #1 2014-02-19 18:44 Good morning! I am interested in ObjectDB for a client project I am currently working on. In order to eva ...

 
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zip file or JAR manifest missing

I found the message: Error opening zip file or JAR manifest missing: /E:/projects/ObjectDB/bin/objectdb.jar Some of projects can read the DB, but others can not read or write the DB. #1 2011-06-28 15:38 I found the message: Error opening zip file or JAR manifest missing : / E :/ projects / Obje ...

 
issue

InternalException - error reading field from "queue" database

I trying to use an objectdb database as a persitent queue but have started getting the following error on the receiver side: Bug Version: 2.2.8 Priority: Normal Status: Closed Replies: 6 Type:  Bug ...

 
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query on calendar class

Hello!   I'm looking for help to build query on calendar class. I need to get objects where Calendar.DAY_OF_WEEK is FRIDAY or any other. My class: @Entity public class Cdr {     private static final long serialVersionUID = 1L;        @Id @GeneratedValue     private long serialID;     private String A;     @Temporal(TemporalType.TIMESTAMP) private Calendar start; I tested: #1 2014-07-27 21:24 Hello!   I'm looking for help to build query on calendar class. I need to get objects wh ...