Hi Abe,
But since switching to the
new machine, I haven't been able to get rabbitmq-server to start up.
The database RabbitMQ uses is bound to the machine's hostname, so if you
copied the database dir to another machine, it won't work. If this is
the case, you have to set up a machine with the same hostname as before
and transfer any outstanding messages to the new machine. If there's
nothing important in rabbit, you could just clear everything by removing
the RabbitMQ files in /var/lib/rabbitmq.
/usr/lib/rabbitmq/lib/rabbitmq_server-1.7.2/sbin/../ebin/rabbit.app
1.7.2 is a *very* old version of the broker. You should really upgrade,
as a lot of new features and a lot of bugfixes have gone in since then.
{"init terminating in do_boot", {{nocatch, {error,{cannot_start_application,
rabbit, {bad_return, {{rabbit,start,[normal,[]]},{'EXIT',
{{case_clause,{error,{timeout_waiting_for_tables, [rabbit_user,
rabbit_user_permission, rabbit_vhost, rabbit_config, rabbit_listener,
rabbit_durable_route, rabbit_route, rabbit_reverse_route,
rabbit_durable_exchange, rabbit_exchange, rabbit_durable_queue,
rabbit_queue]}}}, [{rabbit,'-run_boot_step/1-lc$^1/1-1-',1},
{rabbit,run_boot_step,1}, {rabbit,'-start/2-lc$^0/1-0-',1}, {rabbit,start,2},
{application_master, start_it_old,4}]}}}}}}}, [{init,start_it,1},
{init,start_em,1}]}}
So, it's timing out waiting for the distributed tables. I suspect this
is because of the hostname change. If you had a cluster set up before,
that may also cause this to happen.
There's also an erlang daemon process running in the background. I'm not sure
if this is important or not.

$ ps aux | grep rabbit
rabbitmq 714 0.0 0.0 1980 412 ? S Dec04 0:01
/usr/lib/erlang/erts-5.7.4/bin/epmd -daemon
That's perfectly normal. It starts up with RabbitMQ (and a few other
Erlang apps) and remains running even after they stop. You can kill it
if you really want to and RabbitMQ isn't running.

Hope this helps.

Cheers,
Alex
On Tue, Dec 06, 2011 at 03:34:32PM +0000, Abe wrote:
I'm running a django/celery app on EC2, with rabbitmq as the broker. The machine
I was using failed, so I fired up another instance. But since switching to the
new machine, I haven't been able to get rabbitmq-server to start up.

Here's the output:


$ sudo rabbitmq-server start
[Rabbit logo and info...]

AMQP 8-0
Copyright (C) 2007-2010 LShift Ltd., Cohesive Financial Technologies LLC., and
Rabbit Technologies Ltd.
Licensed under the MPL. See http://www.rabbitmq.com/

node : rabbit at ip-10-212-66-181
app descriptor:
/usr/lib/rabbitmq/lib/rabbitmq_server-1.7.2/sbin/../ebin/rabbit.app
home dir : /var/lib/rabbitmq
cookie hash : 5+uQ077En5bpvle3HJCQMg==
log : /var/log/rabbitmq/rabbit.log
sasl log : /var/log/rabbitmq/rabbit-sasl.log
database dir : /var/lib/rabbitmq/mnesia/rabbit

starting internal event notification system ...done
starting logging server ...done
starting database ...Erlang
has closed
{"init terminating in do_boot", {{nocatch, {error,{cannot_start_application,
rabbit, {bad_return, {{rabbit,start,[normal,[]]},{'EXIT',
{{case_clause,{error,{timeout_waiting_for_tables, [rabbit_user,
rabbit_user_permission, rabbit_vhost, rabbit_config, rabbit_listener,
rabbit_durable_route, rabbit_route, rabbit_reverse_route,
rabbit_durable_exchange, rabbit_exchange, rabbit_durable_queue,
rabbit_queue]}}}, [{rabbit,'-run_boot_step/1-lc$^1/1-1-',1},
{rabbit,run_boot_step,1}, {rabbit,'-start/2-lc$^0/1-0-',1}, {rabbit,start,2},
{application_master, start_it_old,4}]}}}}}}}, [{init,start_it,1},
{init,start_em,1}]}}

Crash dump was written to: erl_crash.dump
init terminating in do_boot ()





There's also an erlang daemon process running in the background. I'm not sure
if this is important or not.

$ ps aux | grep rabbit
rabbitmq 714 0.0 0.0 1980 412 ? S Dec04 0:01
/usr/lib/erlang/erts-5.7.4/bin/epmd -daemon

Any ideas on how to further diagnose/solve this problem?


Thanks in advance!
- Abe


PS: I posted this question to serverfault before realizing that this might be a
better place to ask it:http://serverfault.com/questions/337982/


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