Chef server throwing error while doing reconfigure

When I try to run chef server reconfigure I get the following error

Error executing action run on resource ‘execute[/opt/opscode/embedded/bin/chpst -u opscode -U opscode /opt/opscode/embedded/bin/rabbitmqctl wait /var/opt/opscode/rabbitmq/db/]’

I also see this at the end of the log :

Running handlers:
[2016-03-24T18:18:28-07:00] ERROR: Running exception handlers
Running handlers complete
[2016-03-24T18:18:28-07:00] ERROR: Exception handlers complete
Chef Client failed. 21 resources updated in 40 seconds
[2016-03-24T18:18:28-07:00] FATAL: Stacktrace dumped to /opt/opscode/embedded/cookbooks/cache/chef-stacktrace.out
[2016-03-24T18:18:28-07:00] FATAL: Please provide the contents of the stacktrace.out file if you file a bug report
[2016-03-24T18:18:30-07:00] FATAL: Mixlib::ShellOut::ShellCommandFailed: execute[/opt/opscode/embedded/bin/chpst -u opscode -U opscode /opt/opscode/embedded/bin/rabbitmqctl wait /var/opt/opscode/rabbitmq/db/] (private-chef::rabbitmq line 110) had an error: Mixlib::ShellOut::ShellCommandFailed: Expected process to exit with [0], but received ‘2’
---- Begin output of /opt/opscode/embedded/bin/chpst -u opscode -U opscode /opt/opscode/embedded/bin/rabbitmqctl wait /var/opt/opscode/rabbitmq/db/ ----
STDOUT: Waiting for rabbit@localhost …
pid is 26083 …
STDERR: Error: process_not_running
---- End output of /opt/opscode/embedded/bin/chpst -u opscode -U opscode /opt/opscode/embedded/bin/rabbitmqctl wait /var/opt/opscode/rabbitmq/db/ ----
Ran /opt/opscode/embedded/bin/chpst -u opscode -U opscode /opt/opscode/embedded/bin/rabbitmqctl wait /var/opt/opscode/rabbitmq/db/ returned 2

How can I resolve this ?

What’s the size of the machine? RAM CPU etc?