How to make remote call of EJB in mod_cluster?

[juliocspires]

Hi,

I'm doing a basic test of remote call of EJB in a cluster with the following scenario:

Environment:

• Two JBoss 7.2.0.Alpha1 (jboss-as-7.2.0.Alpha1-SNAPSHOT - Build #3363 (Jan 28, 2013 7:31:47 AM))
• mod_cluster 1.2.0
• JDK 1.7.0_11

Computer 1:
- Node A and B: 192.168.20.128 (same machine with offset of ports);

Configurations:

• Node A (IP: 192.168.20.128, Port: 4447)
• Node B (IP: 192.168.20.128, Port: 4647)

Computer 2:
- httpd + Modcluster: 192.168.20.243

Configurations:

• http.conf

ServerName 192.168.20.243

LoadModule slotmem_module modules/mod_slotmem.so

LoadModule manager_module modules/mod_manager.so

LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy.so

LoadModule proxy_cluster_module modules/mod_proxy_cluster.so

LoadModule advertise_module modules/mod_advertise.so

LoadModule proxy_ajp_module /usr/lib/apache2/modules/mod_proxy_ajp.so

CustomLog "/var/log/httpd-access.log" combined

MemManagerFile /var/cache/httpd

<VirtualHost 192.168.20.243:80>

  <Directory />

   Order deny,allow

   Deny from all

   Allow from all

</Directory>

# This directive allows you to view mod_cluster status at URL http://192.168.20.243:80/mod_cluster-manager

<Location /mod_cluster-manager>

  SetHandler mod_cluster-manager

  Order deny,allow

  Deny from all

  Allow from all

</Location>

KeepAliveTimeout 60

MaxKeepAliveRequests 0

ManagerBalancerName other-server-group

AdvertiseFrequency 5

ServerAdvertise On

EnableMCPMReceive

</VirtualHost>

Question:
- How do remote call of EJB in mod_cluster?
I configured the properties, but returns the following error:

PM org.jboss.ejb.client.remoting.ConfigBasedEJBClientContextSelector setupEJBReceivers

WARN: Could not register the EJB receiver for connection to 192.168.20.243:4447

java.lang.RuntimeException: Operation failed with status WAITING

[wdfink]

With that little information it would not be possible to help.

What version(s) of JBoss do you use?

How the remote call look like?

Maybe you run into the same issue https://community.jboss.org/message/793927#793927

[rhusar]

You can also try the remote EJB quickstart: https://github.com/jboss-jdf/jboss-as-quickstart/tree/master/ejb-remote

And try with latest release (7.1.3.Final).

[juliocspires]

I have written more details in the description of the problem.

I performed a simple example, but neither worked.

If I put all computers in the file of properties seems to work. However, I would make via the mod_cluster because I need high availability in the EJB.

How to call remote EJBs via mod_cluster?  Is there any specific configuration?

[rhusar]

I see you renamed the question -- a bit confusing now!

How to call remote EJBs via mod_cluster?  Is there any specific configuration?

No, this is not possible. Mod_cluster is only used for HTTP requests. You could expose your EJB via some HTTP and then you can use mod_cluster.

In general, you want to use EJB clustering. You need a JBoss remote EJB client and make your beans clustered, e.g. by adding @Clustered annotation to the EJBs. Once everything is configured and started in cluster, your beans are clustered and highly-available. Loook at the quickstart I linked earlier, also look at some clustering flavours of the quickstarts.