How to configure HornetQ client with standalone server cluster (configured using JGroups TCP)
I have configured 2 hornetq standalone servers in clustered mode using groups (tcp) as i cant use default UDP. Below is the configuration.
hornetq-configuration.xml:
<broadcast-groups> <broadcast-group name="bg-group1"> <jgroups-file>jgroups-tcp.xml</jgroups-file> <jgroups-channel>hornetq_broadcast_channel</jgroups-channel> <connector-ref>netty</connector-ref> </broadcast-group> </broadcast-groups> <discovery-groups> <discovery-group name="dg-group1"> <jgroups-file>jgroups-tcp.xml</jgroups-file> <jgroups-channel>hornetq_broadcast_channel</jgroups-channel> <refresh-timeout>10000</refresh-timeout> </discovery-group> </discovery-groups>
Jgroups.xml:
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="urn:org:jgroups"
xsi:schemaLocation="urn:org:jgroups http://www.jgroups.org/schema/jgroups.xsd">
<TCP bind_port="7800"
recv_buf_size="${tcp.recv_buf_size:5M}"
send_buf_size="${tcp.send_buf_size:5M}"
max_bundle_size="64K"
max_bundle_timeout="30"
use_send_queues="true"
sock_conn_timeout="300"
timer_type="new3"
timer.min_threads="4"
timer.max_threads="10"
timer.keep_alive_time="3000"
timer.queue_max_size="500"
thread_pool.enabled="true"
thread_pool.min_threads="2"
thread_pool.max_threads="8"
thread_pool.keep_alive_time="5000"
thread_pool.queue_enabled="true"
thread_pool.queue_max_size="10000"
thread_pool.rejection_policy="discard"
oob_thread_pool.enabled="true"
oob_thread_pool.min_threads="1"
oob_thread_pool.max_threads="8"
oob_thread_pool.keep_alive_time="5000"
oob_thread_pool.queue_enabled="false"
oob_thread_pool.queue_max_size="100"
oob_thread_pool.rejection_policy="discard"/>
<TCPPING
initial_hosts="${jgroups.tcpping.initial_hosts:hornetq-server1-ip[7800], hornetq-server1-ip[7900], hornetq-server2-ip[7800], hornetq-server2-ip[7900]}"
port_range="1"/>
<MERGE3 min_interval="10000"
max_interval="30000"/>
<FD_SOCK/>
<FD timeout="3000" max_tries="3" />
<VERIFY_SUSPECT timeout="1500" />
<BARRIER />
<pbcast.NAKACK2 use_mcast_xmit="false"
discard_delivered_msgs="true"/>
<UNICAST3 />
<pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000"
max_bytes="4M"/>
<pbcast.GMS print_local_addr="true" join_timeout="2000"
view_bundling="true"/>
<MFC max_credits="2M"
min_threshold="0.4"/>
<FRAG2 frag_size="60K" />
<!--RSVP resend_interval="2000" timeout="10000"/-->
<pbcast.STATE_TRANSFER/>
</config>
Servers work fine i.e., if the live goes down, backup takes its place.
Client producer:
TransportConfiguration[] servers = new TransportConfiguration[2];
List<Configuration> configurations = ... // user defined class
for (int i = 0; i < configurations.size(); i++) {
Map<String, Object> map = new HashMap<>();
map.put("host", configurations.get(i).getHost());
map.put("port", configurations.get(i).getPort());
servers[i] = new TransportConfiguration(NettyConnectorFactory.class.getName(), map);
}
ServerLocator locator = HornetQClient.createServerLocatorWithHA(servers);
locator.setReconnectAttempts(5);
factory = locator.createSessionFactory();
session = factory.createSession();
producer = session.createProducer(queueName);
Client Consumer:
ClientSessionFactory factory = locator.createSessionFactory();
for (int i = 1; i <= nReceivers; i++) {
ClientSession session = factory.createSession(true, true, 1);
sessions.add(session);
if (i == 1) {
Thread.sleep(10000); // waiting to download cluster information
}
session.start();
ClientConsumer consumer = session.createConsumer(queueName);
consumer.setMessageHandler(handler);
}
Issue:
- Client (producer) doesnt automatically fall back if the server connected to, goes down, while sending messages.
- The sessions created using same client factory is always connecting to one server (as opposed to documentation http://docs.jboss.org/hornetq/2.3.0.beta1/docs/user-manual/html/clusters.html#clusters.client.loadbalancing)
So it seems the client never gets the cluster information. I also dont find any documentation for configuring a client to use jgroups (needed?) to connect to a hornetq cluster.
Any help is appreciated.
