[op5-users] troubleshooting merlin

[Andreas Ericsson]

On 10/05/2009 02:36 PM, Russell Jennings wrote:
> So,
>
> I created a new VM (centos) and installed nagios then merlin in it.
> the problem i'm having is the NOC isn't getting data from the poller.
> or at least it's not ending up in nagios.
>
> i have watch tail'd both logs on the NOC and poller.
>
> sometimes this guy pops up and i gotta restart the one complaining:
>
> in read_event: incomplete header read(). expected 64, got 0.
> read() from NOC node noc1 failed: success     (also, this line is
> confusing with the failed : success)
>

"success" here means read(2) didn't return with an error code, but
that it did get a zero read from the socket, which we consider an
error since it usually means that the other end has silently gone
away.

> other lines...
> new connection inbound when one already exists. dropping old.
>
> and in the poller:
> recv(7, (buf + total), 391, MSG_DONTWAIT | MSG_NOSIGNAL) returned -1
> (resource temporarily unavailable)
> Bogus read in proto_read_event() got -1 expected 524
> read() from NOC noc1 failed: Resource temporarily unavailable
>
> now, the frustrating thing, is i have another VM running debian (as
> the node) with the same config, and it works fine. both have the same
> IP, and same config, so when i bring one down and the other up, it
> works.
>
> So at this point i have no idea how to proceed. Would like to sort out
> WHY this doesn't work because the new VM i created is going to (or was
> going to be) the deploy node. However i am out of ideas as to what to
> do or try.
>

Well, if you run the two nodes simultaneously you will ofcourse get an
IP conflict in your network, so the behaviour of any network transport
protocol can only be described as "undefined" when that happens.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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