About failure

manual

Database Management Settings

Explains settings and performance tuning of the ObjectDB Java object database for JPA/JDO.... file can be used to fix the database. Recovery from failure is automatically applied by ObjectDB when a database is opened and a ... the database) have to be recorded. For debugging of query failure it might be necessary to record "all" operations in order to ...

 
forum_thread

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: ... We had a database failure causing a production outage. Both master and slave databases have ... also unexpected. Is it possible that actually the failure started on the master? In that case, if you use a combined master/slave ...

 
forum_thread

Failure after ObjectDB 2.4.5_07 upgrade from 2.4.4_06

After upgrading we see the following exception: #1 2013-01-16 17:11 After upgrading we see the following exception: at java.lang.Thread.run(Thread.java:662) Caused by: com.obj ...

 
forum_thread

ObjectDB stability after power failure

I'm considering using ObjectDB in a system that is going to be running continuously without support instantly available for many years.  How stable is ObjectDB when it comes to power failures and unattended restarts?  Is database integrity maintained during such events?  I have seen database vendors perform 'kick the plug out' demonstrations of how their product will survive power failures.  Is ObjectDB suitably robust that it won't fail in such situations?    ... that should enable fully automatic recovery on power failure:  Recovery File and  Recording . If you try a 'kick ...

 
forum_thread

Optimistic locking failure

Optimistic locking failure: I am using a Semaphore to force this execution of concurrents transactions T1 and T2 that cause parallel updates to A/B but it does not throw an OptimisticLockException and roll back. ... Optimistic locking failure: I am using a Semaphore to force this execution of concurrents ...

 
forum_thread

Enhancer failure: Failed to process class file of type

Stack trace below:   ... ... 34 more FAILURE: Build failed with an exception. ...

 
forum_thread

JDOHelper.isDetached failure ?

Running this example code: #1 2014-06-04 21:37 Running this example code: public static void main ( String [ ] args ...

 
forum_thread

Merge failure with composite primary key

It was working well with previous releases and now is failing: Exception in thread "main" [ObjectDB 2.3.7_20] javax.persistence.EntityNotFoundException Entity is not found: MergeTest#('Hello',0) (error 631) at com.objectdb.jpa.EMImpl.merge(EMImpl.java:451) at MergeTest.main(MergeTest.java:19)   Thanks. #1 2012-04-27 16:55 It was working well with previous releases and now is failling: Exception in thread "main" [ObjectDB 2.3. ...

 
forum_thread

failure to enforce NOT NULL for java.lang.String

my test cases are indicating that @Basic(optional=false) and @Persistent(nullValue=NullValue.EXCEPTION) are not enforced in 2.3.7_08 or that i have failed to understand how to annotate. example: @Entity public class Request {   public Request() { }   @Id @GeneratedValue(strategy=GenerationType.IDENTITY)   private Long id; #1 2012-04-06 12:53 my test cases are indicating that @Basic(optional=false) and @Persistent(nullValue=NullValue.EXCEPTION) are not e ...

 
api-jpa

javax.persistence.EntityManager

Interface used to interact with the persistence context.(Interface of JPA)