Dear Roth,
please, find my answers inline below....
Regards,
Simone Giannecchini
GeoServer Professional Services from the experts!
Visit http://goo.gl/it488V for more information.
Ing. Simone Giannecchini
@simogeo
Founder/Director
GeoSolutions S.A.S.
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Italy
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On Tue, Aug 25, 2015 at 9:01 AM, Rot Ulet <rotulet@anonymised.com> wrote:
Up !
Sorry to re-send the message but as I received no answer from my previous
questions, I wish to try again ...
Thx
Hi,
I am running into problems configuring the jms clustering of Geoserver.
Here is the background:
I have 4 virtualboxes, each running a Geoserver 2.7.1 with the jms-cluster
extension. I would like to keep the embedded broker in a matter of simpler
installation. Also I would like to preserve this kind of peer to peer
network because it supports easily the add or removal of node and because
clients, do not have to know the broker network config.
I was about to say that this should be supported out-of-the-box with
the multicast approach but it looks like you can't use it.
However, my network admin announced me multicast will not be allowed in
production environment.
There you go 
So as I know a priori the ip addresses of all the
geoserver instances, I would like to change the multicast to a set of static
ip setting the java property
'activemq.transportConnectors.server.discoveryURI' to
'static:(host1,host2,etc.)'.
But I got a NullPointerException from activemq. I even tried to upgrade to
latest version of activemq jars (as suggested by the fix -
issues.apache.org/jira/browse/AMQ-5442) but it does the same: geoserver do
not bootstrap. Here the top of the stacktrace:
21 Jul 10:26:04 ERROR [cluster.impl] - java.lang.NullPointerException at
org.apache.activemq.transport.discovery.simple.SimpleDiscoveryAgent.start(Simple
DiscoveryAgent.java:92) at
org.apache.activemq.broker.TransportConnector.start(TransportConnector.java:253)
at
org.apache.activemq.broker.BrokerService.startTransportConnector(BrokerService.j
ava:2593) at
org.apache.activemq.broker.BrokerService.startAllConnectors(BrokerService.java:2
506) at
org.apache.activemq.broker.BrokerService.doStartBroker(BrokerService.java:710)
Then I have disabled the embedded broker and install an external one (latest
version) for each Geoserver VMs. Brokers can see each other and exchange
messages. If I create a style from one Geoserver, the jms messages are sent
to the other broker in the good topic. But the other geoserver does not
retrieve the messages from its local broker... so the style is not
imported...
Here is my configuration:
* /etc/default/activemq pastebin.com/XARMtzQF
* activemq.xml pastebin.com/PTkpUhjP
* cluster.properties pastebin.com/CDKPKG2J.
The activemq version was 5.11.1 and I got the same results the 5.9.0.
Can I have some hints to configure my geoservers with the embedded broker
without multicast? Or, at least, hints for an external broker without
mutilcast?
I believe I tried to help a bit with this kind of questions on Stackexchange.
The first config is something we never tried, It would need some of
our devs time to make sure it is supported and work properly.
About the second, this should work as well as it is one of the two
configurations that we usually uses (1 being the p2p embedded broker
with multicast).
You can find some additional information in this documents:
http://geoserver.geo-solutions.it/edu/en/clustering/geoserver/active/index.html#advanced-stand-alone-mom-configuration-and-usage
I would suggest to make sure that the various instances are acting as
slaves and that the connection with the broker is enabled (see the
cluster configuration page that is available once you deploy the jms
clustering extension in geoServer).
Let me know how it goes, it might also be wort to sayin with OS you
are using for the deploy.
Regards,
Rot.
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