About Application Server

forum_thread

Date field Index is corrupted due to time change

Hi, can you shed some light on why we cannot delete data from the attached DB file. A delete attempt with DB explorer results in the following exception: ... by Java HotSpot ( TM ) 64 - Bit Server VM 1.7.0_80 ( on Linux 2.6.32 - 279.9.1. el6 . x86_64 ... extremely rare) that the specific activity in your application is not supported well by ObjectDB and some hidden unknown bug may ...

 
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Java 9 support

Hi,  is ObjectDB supporting Java 9 already ? If not when can we expect the support for it ? ... created a 100% modular JAR Java 9 version of my application (no --class-path, no unnamed module, no automatic modules, no ... 9.  Here are the results. Using the slowest server provided by Amazon Web Services (a "t2.nano", which has only a single ...

 
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Left join fetch behaviour doesn't retrieve children?

Hello support, I'm a little bit confused about a left join fetch behaviour. In this test case, i try to fetch my 3 children using a left join fetch. But my collection is null after closing the em. It was expected to be fetched before closing the em, no ? In fact, that is the objective of the fetch purpose (i guess ?). ... i can't reproduce the issue, it only happen in my server. Can you confirm me that we MUST retrieve at least 1 MyEntity ... If ALL EAGER is faster in your application then you should use it anyway. We will take into account your ...

 
issue

Out of Memory - Slow leak?

This is a continutaion of Issue 61 - unfortunately it doesnt seem that the fix in 2.2.9_03 has fixed the problem. The scenario is still the same: I have two "producer" processes which insert messages into an objectdb "queue" database running with an objectdb server process. I have one "consumer" process which reads messages from the queue database and inserts these into an embedded "normal" objectdb database. This is the process which has generated the OOM exception. ... into an objectdb "queue" database running with an objectdb server process. I have one "consumer" process which reads messages from ... Maybe it would be better if you send a heap dump of your application after 2-3 days (before the OutOfMemoryError ) instead of after ...

 
forum_thread

Guestbook example from tutorial does not work.

Hi, I have Problems to initialize objectdb in a jee envoirment. I used the Guestbook from the tutorial and try to deploy on Tomcat but i get this error. Caused by: org.apache.tomee.catalina.TomEERuntimeException: org.apache.openejb.OpenEJBException: Creating application failed: /objectdb-2.6.2/tutorials/guestbook-jee6/target/Guestbook: org.apache.openejb.OpenEJBRuntimeException: java.lang.ClassNotFoundException: com.objectdb.jpa.Provider: java.lang.ClassNotFoundException: com.objectdb.jpa.Provider ... org.apache.openejb.OpenEJBException: Creating application failed: /objectdb-2.6.2/tutorials/guestbook-jee6/target/Guestbook: ... com.objectdb.jpa.Provider Server version: Apache Tomcat/7.0.55 Server built:   Jul 18 2014 05:34:04 Server number:  ...

 
forum_thread

Many connections possible? and will it makes problem in future?

Hello , we are currently making new instant messenger but we were planing to use some security addons and privileges on access some of the fields on java side.   My questions is about : 1-) Can objectdb server handle 200.000+ connections at the same time concurrently ? Does it have queue and cache ? 2-) Can we give privileges to users , for example some users can only read some fields and some just can write java fields. Some users only allowed insert ability. ... My questions is about : 1-) Can objectdb server handle 200.000+ connections at the same time concurrently ? Does it have ... probably a bad idea. Usually this should be handled by the application server or web server (GlassFish, JBoss, Tomcat) or by dedicated ...

 
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Externalising persistence.xml properties in Glassfish?

Hi, ... for the database. You see I'm trying to create a 'server' and be able to have the datasource ... one with the creadentials. If i recall correctly the application should be able to pick them up if you give the place holder. I know I have tried this in the application.xml  and I dont see why it wont work for the persitance   ...

 
forum_thread

WebService : Failed to get reference value of field using enhanced method

Hi, I try to use objectdb from Tomcat Webservice without webservice it's works fine:   error: Failed to commit transaction: Failed to get reference value of field field persistence.PolicyEntity.policyString using enhanced method ... if you archive java classes to .aar file and deploy on application server (Tomcat) - you become this error. With logging I know, that ...

 
forum_thread

Improvement in replication

Hi, I was thinking about some improvement in replication mechanism. Our application do only few writes (mostly reads), but those writes are important for us - objects rating, profile modifications. So in current implementation when master node dies, there is only a chance to read data from slave and all writes fails. ... about some improvement in replication mechanism. Our application do only few writes (mostly reads), but those writes are important ... dies, so the user knows that transaction failed. On slave server (and only on them) there can be some kind of timeout for replicated ...

 
forum_thread

What are the steps of creating small web app?

Hello guys, I have a question about creating small new web application, I am almost done with researching and studying and I have covered all the important concepts e.g. # Starting from web technologies: HTML, CSS, JS, JQuery. # Moving to Java Technologies:  Core Java, Servlet, Managed Beans, JSF, JSP, EJB, JMS, JPA, JDBC,Security, Ajax using Primefaces. # Backend technologies: MYSQL, SQLite, JavaDB, BIRT/ Jasper reporting. Tools: Eclipse, Netbeanse, SVN, Git repositories, SQLyog, Glassfish. ------------- ... Hello guys, I have a question about creating small new web application, I am almost done with researching and studying and I have covered ... Pay as You Go (PAYG) . - Which IDE and Application Server do you prefer to go with  for me as a beginner? * Note: ...