If you have a RabbitMQ cluster and a crashed node fails to start again with
{"init terminating in do_boot",{undef,[{rabbit_prelaunch,start,[]},{init,start_it,1},{init,start_em,1}]}}in /var/log/rabbitmq/startup_log and something like
Error description:
{could_not_start,rabbitmq_management,
{{shutdown,
{failed_to_start_child,rabbit_mgmt_sup,
{'EXIT',
{{shutdown,
[{{already_started,<9180.461.0>},
{child,undefined,rabbit_mgmt_db,
{rabbit_mgmt_db,start_link,[]},
permanent,4294967295,worker,
[rabbit_mgmt_db]}}]},
{gen_server2,call,
[<0.427.0>,{init,<0.425.0>},infinity]}}}}},
{rabbit_mgmt_app,start,[normal,[]]}}}
Log files (may contain more information):
/var/log/rabbitmq/[email protected]
/var/log/rabbitmq/[email protected]
in /var/log/rabbitmq/
[email protected] then you might want to try to drop the node from the cluster by running
rabbitmqctl forget_cluster_node rabbit@rabbit-01
one a working cluster node and rejoin the node by running
rabbitmqctl join_cluster rabbit@rabbit-02
on the disconnected node (given rabbit-02 is a working cluster member).
Note: Doing this might make you lose messages!