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4839ca8491
This unregistration doesn't happen currently, but doesn't seem to
cause any problems in general, as on stop gossiper is stopped and
nothing from it hits the store_service.
However (!) if an exception pops up between the storage_service
is subscribed on gossiper and the drain_on_shutdown defer action
is set up then we _may_ get into the following situation:
- main's stuff gets unrolled back
- gossiper is not stopped (drain_on_shutdown defer is not set up)
- migration manager is stopped (with deferred action in main)
- a nitification comes from gossiper
-> storage_service::on_change might want to pull schema with
the help of local migration manager
-> assert(local_is_initialized) strikes
Fix this by registering storage_service to gossiper a bit earlier
(both are already initialized y that time) and setting up unregister
defer right afterwards.
Test: unit(dev), manual start-stop
Bug: #5628
Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
Message-Id: <20200130190343.25656-1-xemul@scylladb.com>