BullMQ instantiates a fresh ioredis client per Queue/Worker when handed a
plain {host, port} config object, and under sustained ZIM ingestion the
embed pipeline leaked ~1 client/sec until Redis maxclients was exhausted.
Pass a single shared ioredis instance (maxRetriesPerRequest: null, as
required by BullMQ) so all queues and workers reuse one client pool.
Workers still duplicate the connection once for their blocking client,
which is expected and bounded.
Closes#885
Allow operators to select a Redis logical database index via the
REDIS_DB environment variable. Without this, the BullMQ queue and the
@adonisjs/transmit Redis transport both implicitly used db 0, causing
key collisions when sharing a Redis instance across multiple services
or environments.
REDIS_DB is added to the env schema as an optional number; both
config/queue.ts and config/transmit.ts fall back to db 0 when unset,
preserving existing behavior.
jakeaturner
Lorenzo Galassi
John Onysko