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if @zk is not connected redis-failover will sit there in an infinite loo... #48

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if @zk is not connected redis-failover will sit there in an infinite loo... #48

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85e12e8
if @zk is not connected redis-failover will sit there in an infinite …
tobowers Jan 17, 2013
11ee865
add shutdown hooks in the client that make retrying to fetch nodes moot
tobowers Jan 17, 2013
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23 changes: 18 additions & 5 deletions lib/redis_failover/client.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,7 @@ def initialize(options = {})
@slaves = []
@node_addresses = {}
@lock = Monitor.new
@shutdown = false
@current_client_key = "current-client-#{self.object_id}"
yield self if block_given?

Expand Down Expand Up @@ -145,15 +146,17 @@ def manual_failover(options = {})
# and then create a new instance of the client. The underlying
# ZooKeeper client and redis clients will be closed.
def shutdown
@zk.close! if @zk
@zk.close! if @zk and @zk.connected?
@zk = nil
@shutdown = true
purge_clients
end

# Reconnect will first perform a shutdown of the underlying redis clients.
# Next, it attempts to reopen the ZooKeeper client and re-create the redis
# clients after it fetches the most up-to-date list from ZooKeeper.
def reconnect
@shutdown = false
purge_clients
@zk ? @zk.reopen : setup_zk
build_clients
Expand Down Expand Up @@ -319,12 +322,22 @@ def fetch_nodes
nodes
rescue Zookeeper::Exceptions::InheritedConnectionError => ex
logger.debug { "Caught #{ex.class} '#{ex.message}' - reopening ZK client" }
@zk.reopen
retry
unless @shutdown
@zk.reopen
retry
end
rescue Zookeeper::Exceptions::NotConnected => ex
logger.warn { "Caught #{ex.class} '#{ex.message}' - reopening ZK client" }
unless @shutdown
@zk.reopen
retry
end
rescue *ZK_ERRORS => ex
logger.warn { "Caught #{ex.class} '#{ex.message}' - retrying" }
sleep(RETRY_WAIT_TIME)
retry
unless @shutdown
sleep(RETRY_WAIT_TIME)
retry
end
end

# Builds new Redis clients for the specified nodes.
Expand Down