gitlabhq/config/initializers/passenger_fix.rb

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if defined?(PhusionPassenger)
# When you're using Passenger with smart-lv2 (default) or smart spawn method,
# Resque doesn't recognize that it has been forked and should re-establish
# Redis connection. You can see this error message in log:
# Redis::InheritedError, Tried to use a connection from a child process
# without reconnecting. You need to reconnect to Redis after forking.
#
# This solution is based on
# https://github.com/redis/redis-rb/wiki/redis-rb-on-Phusion-Passenger
#
PhusionPassenger.on_event(:starting_worker_process) do |forked|
# if we're in smart spawning mode, reconnect to Redis
Resque.redis.client.reconnect if forked
end
end