Session replication not work with Jboss eap 6.2 and mod_cluster 1.2.6

[namtn]

Hi everyone,

I plan to deploy my application in jboss clustering environment. I used Jboss eap 6.2 and mod_cluster 1.2.6.

My model as below:

Server 1 (10.1.1.10): installed httpd and mod_cluster. (I downloaded version combine mod_cluster and httpd).

Server 2 (10.1.1.11): installed jboss with node name: node1  (i was added proxy-list="10.1.1.10:6666")

Server 3 (10.1.1.12): installed jboss with node name: node2  (i was added  changed proxy-list="10.1.1.10:6666")

I start two node with standalone-ha configuration, deployed my app onto node1 and node 2 and take a tested:

1. when both node are running => OK

2. when i shutdown node 1 and access app => it redirect to node 2. App still working but session id has changed.

I think  the session replication is not work. I also added <distributable/> in web.xml.

Anyone can help me?

[rhusar]

Make sure you are using the HA profile (start standalone with standalone-ha.xml profile or ha profile in domain mode).

[namtn]

Of course Husar ,

my command to start jboss:

standalone.sh -server-config=standalone-ha.xml -b 0.0.0.0 -Djboss.mod_cluster.advertise.enabled=true -Djboss.jvmRoute="node2"

Addition, even if i start jboss with standalone-full-ha profile, result still the same.

[rhusar]

Are you using multicast to discover the nodes?

You should see similar logs when starting the AS:

13:37:45,299 INFO  [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (ServerService Thread Pool -- 60) ISPN000078: Starting JGroups Channel

13:37:45,309 INFO  [stdout] (ServerService Thread Pool -- 60)

13:37:45,309 INFO  [stdout] (ServerService Thread Pool -- 60) -------------------------------------------------------------------

13:37:45,309 INFO  [stdout] (ServerService Thread Pool -- 60) GMS: address=x220-2/web, cluster=web, physical address=127.0.0.1:55300

13:37:45,310 INFO  [stdout] (ServerService Thread Pool -- 60) -------------------------------------------------------------------

13:37:45,476 INFO  [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (ServerService Thread Pool -- 60) ISPN000094: Received new cluster view: [x220/web|1] (2) [x220/web, x220-2/web]

13:37:45,480 INFO  [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (ServerService Thread Pool -- 60) ISPN000079: Cache local address is x220-2/web, physical addresses are [127.0.0.1:55300]

13:37:45,485 INFO  [org.infinispan.factories.GlobalComponentRegistry] (ServerService Thread Pool -- 60) ISPN000128: Infinispan version: Infinispan 'Infinium' 6.0.1.Final

[namtn]

Hi Husar , I got a problem when starting Jgroups:

the receive buffer of socket DatagramSocket was set to 20MB, but the OS only allocated 5MB. This might lead to performance problems. Please set your max receive buffer in the OS correctly (e.g. net.core.rmem_max on Linux)

I've already added: -Djava.net.preferIPv4Stack=true in script start jboss.

--------------------------------------------------------------------------------------------------------------------------------------------

After i updated:

     net.core.rmem_max = 25480000

     net.core.wmem_max = 25480000

The warning log out, Jgroups start ok however the session replication still not work:

[songty]

Hi Nam,

You offer me three cups of beer in this weekend, you will have solution for this.

Song Ty,

[namtn]

Oke Song, show me?

[namtn]

Everything work well after I Disable SELinux,

Thanks all

[rhusar]

Tran Nam wrote:

Everything work well after I Disable SELinux,

Thanks all

Can you look at the selinux log to see what was denied and post it here? I haven't heard about this problem before.

After i updated:

     net.core.rmem_max = 25480000

     net.core.wmem_max = 25480000

The warning log out, Jgroups start ok however the session replication still not work:

That's right, but it was just a warning, not an error. It would only impact ideal performance, but won't stop the clustering from functioning.

[namtn]

Hi Husar,

I found some things in SELinux logging:

type=AVC msg=audit(1397035766.394:678): avc:  denied { name_bind } for  pid=11326 comm="httpd.worker" src=23364 scontext=unconfined_u:system_r:httpd_t:s0 tcontext=system_u:object_r:port_t:s0 tclass=udp_socket

[rhusar]

Oh yes, to run such a low level software with selinux, you need to have the policy in place.

Check this entry in the FAQ:

http://docs.jboss.org/mod_cluster/1.2.0/html/faq.html#d0e5711

[kowshikns]

Hi Tram,

I am trying to configure session replication from past 3 days. but with no success.

Is it possible to share the configuration files please? THis would be helpful

Thanks in advance.

Kowshik