[org.jboss.rem oting.CannotConnectException: Can not connect

[juddmaltin]

Hi Folks:

I've setup jopr server in my test env. It works fine with jopr agents installed in that network.

I have another network where I'd like to put agents and have them talk to the server in the test env. Firewalls in between.

So, I read the FAQ

http://mc4j.org/confluence/display/JOPR2/FAQ#FAQ-WhatportsdoIhavetobeconcernedaboutwhensettingupafirewallbetweenserversandagents%3F

and opened TCP as indicated:

server -> agent : port 16163
agent -> server : port 7080 (unsecure) OR 7443 (secure)

I installed the agent on the other network, and it is able to authenticate to the server just fine, and I see it in the GUI when I look at the "High Availability" settings.

But when it tries to download plugins, I get the following:

2009-12-02 12:27:01,216 WARN [ClientCommandSenderTask Timer Thread #0] (org.rhq.enterprise.agent.FailoverFailureCallback)- {AgentMain.too-many-failover-attempts}Too many failover attempts have been made [1]. Exception that triggered the failover: [org.jboss.remoting.CannotConnectException: Can not connect http client invoker. Connection refused.]
2009-12-02 12:27:01,216 ERROR [ClientCommandSenderTask Timer Thread #0] (enterprise.communications.command.client.JBossRemotingRemoteCommunicator)- {JBossRemotingRemoteCommunicator.init-callback-failed}The initialize callback has failed. It will be tried again. Cause: org.jboss.remoting.CannotConnectException:Can not connect http client invoker. Connection refused. -> java.net.ConnectException:Connection refused. Cause: org.jboss.remoting.CannotConnectException: Can not connect http client invoker. Connection refused.
2009-12-02 12:27:01,216 WARN [main] (org.rhq.enterprise.agent.AgentMain)- {AgentMain.plugin-update-failure}Failed to update the plugins.. Cause: org.jboss.remoting.CannotConnectException: Can not connect http client invoker. Connection refused.

What might be keeping the http client invoker from listening? I can connect from the test network to the other network just fine:

$ nc -zvw 1 172.29.75.132 16163
Connection to 172.29.75.132 16163 port [tcp/*] succeeded!

it also connects via fqdn just fine.

Can you guys help?

Thanks!
-judd

[mazz]

Read this:

http://rhq-project.org/display/JOPR2/High+Availability#HighAvailability-ServerandAgentEndpoints

and this

http://rhq-project.org/display/JOPR2/RHQ+Agent+Installation#RHQAgentInstallation-ConfiguretheRHQAgent

(for that second page, see the table, specifically "RHQ Server Hostname or IP Address").

In short, make sure the server's public endpoint address as defined in the GUI is resolvable by the agent.

When the agent starts, it talks to the "RHQ Server Hostname or IP Address" you gave it at startup/setup time. But the agent will only use that hostname/IP to register that one time. Once registered, the server will tell the agent what server(s) it should talk to from here on out. And those hostnames/IPs come from the server - as listed in the Administration>High Availability>Servers page.

[juddmaltin]

Hey Mazz!

THANKS! Look, it's in the faq, even. Silly me. Kinda confusing, tho.

http://mc4j.org/confluence/display/JOPR2/FAQ#FAQ-MyAgentsetupiscorrectbutmyAgentisgetting%22Cause%3Aorg.jboss.remoting.CannotConnectException%3ACannotconnecthttpclientinvoker.%22

-judd