Description of configuration options for rpc

Configuration option = Default value	Description
[DEFAULT]
allowed_rpc_exception_modules = nova.exception, cinder.exception, exceptions	(ListOpt) Modules of exceptions that are permitted to be recreated upon receiving exception data from an rpc call.
engine_life_check_timeout = 2	(IntOpt) RPC timeout for the engine liveness check that is used for stack locking.
matchmaker_heartbeat_freq = 300	(IntOpt) Heartbeat frequency
matchmaker_heartbeat_ttl = 600	(IntOpt) Heartbeat time-to-live.
rpc_backend = heat.openstack.common.rpc.impl_kombu	(StrOpt) The messaging module to use, defaults to kombu.
rpc_cast_timeout = 30	(IntOpt) Seconds to wait before a cast expires (TTL). Only supported by impl_zmq.
rpc_conn_pool_size = 30	(IntOpt) Size of RPC connection pool
rpc_response_timeout = 60	(IntOpt) Seconds to wait for a response from call or multicall
rpc_thread_pool_size = 64	(IntOpt) Size of RPC thread pool
[matchmaker_ring]
ringfile = /etc/oslo/matchmaker_ring.json	(StrOpt) Matchmaker ring file (JSON)
[rpc_notifier2]
topics = notifications	(ListOpt) AMQP topic(s) used for OpenStack notifications