Hi All,
I'm having some problems configuring jgroups failure detection. I'm using jBoss
JBoss [Zion] 4.0.5.GA (build: CVSTag=Branch_4_0 date=200610162339) and jgroups
2.2.9 beta2.
My setup consists of 2 nodes, each with 8 interfaces, paired into 4 redundant
groups per node.
| |
| | App 1 | App 1
| | |
| ----------------- -----------------
| App 3 | | Mgmt | | App3
| ------| NODE 1 |---------------| NODE 2 |-------
| | | | |
| ----------------- -----------------
| | |
| | |
| | Database |
| ---------------------------------
I've used the -b option to bind all traffic to the management lan, and tweaked
my application to bind only to the App 1 LAN. What I'm now trying to do is have
the healthcheck/failure detection run explicitly over the Database LAN.
I've editted my cluster-service.xml file, which looks like this (editted for
brevity):
<Config>
| <UDP mcast_addr="${jboss.partition.udpGroup:228.1.2.3}"
mcast_port="45566"
| ip_ttl="${jgroups.mcast.ip_ttl:8}" ip_mcast="true"
| mcast_recv_buf_size="2000000" mcast_send_buf_size="640000"
| ucast_recv_buf_size="2000000" ucast_send_buf_size="640000"
| loopback="false"/>
| <PING timeout="2000" num_initial_members="3"
| up_thread="true" down_thread="true"/>
| <MERGE2 min_interval="10000" max_interval="20000"/>
| <FD_SOCK srv_sock_bind_addr="192.168.104.56"
down_thread="false" up_thread="false"/>
| <VERIFY_SUSPECT timeout="3000" num_msgs="3"
| up_thread="true" down_thread="true"/>
| <pbcast.NAKACK gc_lag="50"
retransmit_timeout="300,600,1200,2400,4800"
| max_xmit_size="8192"
| up_thread="true" down_thread="true"/>
| <UNICAST timeout="300,600,1200,2400,4800" down_thread="true"/>
| <pbcast.STABLE desired_avg_gossip="20000" max_bytes="400000"
| up_thread="true" down_thread="true"/>
| <FRAG frag_size="8192"
| down_thread="true" up_thread="true"/>
| <pbcast.GMS join_timeout="5000" join_retry_timeout="2000"
| shun="true" print_local_addr="true"/>
| <pbcast.STATE_TRANSFER up_thread="true" down_thread="true"/>
| </Config>
This is the config on Node 2 - 192.168.104.56 is this nodes VIP for the
database interface.
I have removed the standard FD algorithm, as it was failing to detect a failure
when the database connection was broken (Based on what I read here
http://www.redhat.com/docs/manuals/jboss/jboss-eap-4.2/doc/Server_Configuration_Guide/Failure_Detection_Protocols-FD.html
- "Regular traffic from a node counts as if it is a live. So, the
are-you-alive messages are only sent when there is no regular traffic to the
node for sometime." - I assumed it must have seen other jGroups traffic across
the management LAN and so counted it as alive).
The problem is that now the second node detects a failure correctly and sets
itself to the master node, but getCurrentView() is still returning two nodes:
Fri Jul 20 14:34:17 BST 2007 MasterNode=true 192.168.105.158:1099
192.168.105.155:1099
(192.168.105.158 & 192.168.105.155 are the Management interfaces for Nodes 1 &
2 respecively)
What's interesting is when I plugged Node 1 back in, Node 2 breifly removed it
from the partition before merging it back in:
Fri Jul 20 14:35:05 BST 2007 MasterNode=true 192.168.105.158:1099
192.168.105.155:1099
| Fri Jul 20 14:35:11 BST 2007 MasterNode=true 192.168.105.158:1099
192.168.105.155:1099
| Fri Jul 20 14:35:16 BST 2007 MasterNode=true 192.168.105.155:1099
| Fri Jul 20 14:35:22 BST 2007 MasterNode=true 192.168.105.155:1099
192.168.105.158:1099
| Fri Jul 20 14:35:29 BST 2007 MasterNode=true 192.168.105.155:1099
192.168.105.158:1099
Any advice or assistance would be greatly appreciated!
Kind Regards,
Neil Saunders.
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