[JBoss Messaging] - question with rollback/redelivery semantics
by rlucente
I have an application with multiple consumers and multiple queues in a many to many mapping. The queues are polled by scheduling the consumers at a fixed delay. Each consumer reads a message and attempts to send an http request to a remote endpoint. If the remote endpoint is unavailable or some other error occurs, the consumer calls rollback and then it or another consumer tries again later. Each consumer has its own session.
What I'm observing is that the rollback/redelivery semantics associate the undelivered messages with a particular consumer/session. If that consumer is destroyed, so are its rollbacked messages. Once rollback occurs, the consumer/session that rolled back is the only consumer that can see the messages.
I really want the ability to:
| read messages from the queue
| attempt to contact an external system
| if that fails, put the messages back on the queue
| another consumer can see and process the messages
|
| I'm using JBoss Messaging 1.2.0 SP1. My company recently obtained JBoss EAP 4.3, which I believe bundles JBoss Messaging 1.4.0, but I won't be able to use that as part of my current delivery.
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16 years, 8 months
[Beginners Corner] - Re: Cannot instantiate class: org.jnp.interfaces.NamingCont
by JuliaF
Many thanks, jaikiran, for your reply. Indeed the issue comes down to a missing librairy.
I checked the link you gave, which was very helpful, but unfortunately I still failed to resolve the problem
I tried several variants of the client's MANIFEST.MF
a)
Manifest-Version: 1.0
Class-Path: beans.jar jndi.properties %JBOSS_HOME%/jbossall-client.jar
Main-Class: lemonpress.client.SimpleSessionClient
b)
Manifest-Version: 1.0
Class-Path: beans.jar jndi.properties C:/jboss/jbossall-client.jar
Main-Class: lemonpress.client.SimpleSessionClient
c)
Manifest-Version: 1.0
Class-Path: beans.jar jndi.properties lib/jbossall-client.jar
Main-Class: lemonpress.client.SimpleSessionClient
(all fererenced files are physically at those locations and the new line added at the end of MANIFEST.MF)
Yet, in all cases I am getting the deployment error:
*** DEPLOYMENTS IN ERROR: Name -> Error
vfsfile:/C:/jboss/server/default/deploy/simple_session.ear -> java.io.IOException: invalid manifest format
--------------------------------------
more specifically:
22:14:17,015 WARN [VFSStructureBuilder] Error populating deployment vfsfile:/C:/jboss/server/default/deploy/simple_session.ear
org.jboss.deployers.spi.DeploymentException: Error populating context vfsfile:/C:/jboss/server/default/deploy/simple_session.ear
at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49)
at org.jboss.deployers.structure.spi.helpers.AbstractStructureBuilder.populateContext(AbstractStructureBuilder.java:144)
at org.jboss.deployers.structure.spi.helpers.AbstractStructureBuilder.populateContext(AbstractStructureBuilder.java:83)
at org.jboss.deployers.structure.spi.helpers.AbstractStructuralDeployers.determineStructure(AbstractStructuralDeployers.java:89)
at org.jboss.deployers.plugins.main.MainDeployerImpl.determineStructure(MainDeployerImpl.java:743)
at org.jboss.deployers.plugins.main.MainDeployerImpl.addDeployment(MainDeployerImpl.java:280)
at org.jboss.deployers.plugins.main.MainDeployerImpl.addDeployment(MainDeployerImpl.java:237)
at org.jboss.system.server.profileservice.ProfileServiceBootstrap.loadProfile(ProfileServiceBootstrap.java:244)
at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:131)
.....
Caused by: java.io.IOException: invalid manifest format
at java.util.jar.Manifest.read(Manifest.java:193)
Would you be so kind to let me know what is wrong with my classpaths?
-------------------------------------
Also when I add all 11 libraries to the classpath in the manifest
I get a different kind of deployment error
*** DEPLOYMENTS IN ERROR: Name -> Error
vfsfile:/C:/jboss/server/default/deploy/simple_session.ear -> java.io.IOException: line too long
This is worrying because assuming that my application grows I will probably need more libraries on the classpath
Is there the way of circumventing this limitation?
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16 years, 8 months