Injected EJB sometimes Null

Posted by carrier on Stack Overflow See other posts from Stack Overflow or by carrier
Published on 2010-02-17T18:21:52Z Indexed on 2010/03/22 15:31 UTC
Read the original article Hit count: 277

Filed under:

ejb

|

ejb3

I'm using a stateless EJB via the @EJB annotation... most of the time everything works as it should but it seems that from time to time what is supposed to be injected resolves to a NULL causing a null pointer exception.

What could cause this intermittent problem?

© Stack Overflow or respective owner

Related posts about ejb

Conceptually how does load-balancing on the EJB tier work in Glassfish/any ejb container

as seen on Stack Overflow - Search for 'Stack Overflow'
I am wondering conceptually how load-balancing works on the EJB-level (not web session replication) with Java EE containers like Glassfish. From what I have gleaned your remote interface is a proxy that delegates your call to one of many servers you may have in an environment. If things fail are… >>> More
create manifest without classpath entries in ejb-client jar, but have classpath entries in main ejb

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using maven-ejb-plugin to generate the ejb jar and the client jar. Also I am using archive to generate the manifest file. But the problem is I need the classpath entries in the ejb jar but not in the client jar. Is there any configuration available to addClasspath only in the main jar and… >>> More
War wont deploy "Unresolved <ejb-link>" Glassfish 3, Netbeans 7

as seen on Stack Overflow - Search for 'Stack Overflow'
I have enterprise aplication with ejb and war module, and since I created local interface web module wont deploy. It builds fine. EJB project is referenced inside web project. Also when I delete <ejb-local-ref> from web.xml it deploys, but then lookup method fails. Glassfish error: SEVERE:… >>> More
Eager / auto loading of EJB / load EJB on startup (on JBoss)

as seen on Stack Overflow - Search for 'Stack Overflow'
EJBs seem to be loaded lazily - whenever accessed. However, I want to initialize them eagerly - i.e. whenever the container starts-up. How is this achieved (in JBoss in particular) This topic gives some hints, but isn't quite satisfactory. >>> More
ClassCastException When Calling an EJB that Exists on Same Server

as seen on Stack Overflow - Search for 'Stack Overflow'
I have 2 ejbs. Ejb-A that calls Ejb-B. They are not in the same Ear. For portability Ejb-B may or may not exist on the same server. (There is an external property file that has the provider URLs of Ejb-B. I have no control over this.) Example Code: in Ejb-A EjbBDelegate delegateB = EjbBDelegateHelper… >>> More

Related posts about ejb3

Error in Jboss 5- DEPLOYMENTS MISSING DEPENDENCIES

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi! I'm new to ejb3. I tried deploying a simple war file.. But, I'm getting the following error. Plz, help me... DEPLOYMENTS MISSING DEPENDENCIES: Deployment "jboss.j2ee:jar=EJB3-war.war,name=Statelessbean,service=EJB3_endpoint" is missing the following dependencies: Dependency "jboss… >>> More
logback with EJB3.1

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using logback/slf4j to handle logging in my application. Everything was working perfectly until I started using EJBs. Once I added a stateless EJB to my app, the logger started ignoring my logback.xml and stopped using my appenders. I switched to a programmatic logger configuration to see what… >>> More
EJB3 Remote vs Webservices, performances?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello I'm planning to a webapp where every guy using it would have a client that would run computations on its computer (because these computations can't be done on the server, too much load...), and then send results to the server. I guess there will be lot of people interested in my application… >>> More
Best current framework for unit testing EJB3 / JPA

as seen on Stack Overflow - Search for 'Stack Overflow'
Starting new project using EJB 3 / JPA, mainly stateless session beans and batch jobs. I've used JUnit in the past on standard Java webapps and it seemed to work pretty well. In EJB2 unit testing was a pain and required a running container such as JBoss to make the calls into. Now that we're going… >>> More
Problem in creation MDB Queue connection at Jboss StartUp

as seen on Stack Overflow - Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details. I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well but in another env. [ env settings and… >>> More