Long initialization time

[rocketraman]

The adapter takes a really long time to initialize the Kafka producers. Here is a log with DEBUG=1:

logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:17:45 Starting Kafka producer for address: [kafka-1:9092], topic: logs.
logspout.1.wgwrytv5dnt8@swarm-manager000001    | # logspout v3.2-dev-custom by gliderlabs
logspout.1.wgwrytv5dnt8@swarm-manager000001    | # adapters: kafka
logspout.1.wgwrytv5dnt8@swarm-manager000001    | # options : debug:1 persist:/mnt/routes
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:18:16 Starting Kafka producer for address: [kafka-2:9092], topic: logs.
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:18:47 Starting Kafka producer for address: [kafka-3:9092], topic: logs.
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.Run(): using inactivity timeout:  1m0s
logspout.1.wgwrytv5dnt8@swarm-manager000001    | # jobs    : http[logs,routes]:80 pump routes
logspout.1.wgwrytv5dnt8@swarm-manager000001    | # routes  :
logspout.1.wgwrytv5dnt8@swarm-manager000001    | #   ADAPTER    ADDRESS         CONTAINERS      SOURCES OPTIONS
logspout.1.wgwrytv5dnt8@swarm-manager000001    | #   kafka      kafka-2:9092                            map[topic:logs]
logspout.1.wgwrytv5dnt8@swarm-manager000001    | #   kafka      kafka-3:9092                            map[topic:logs]
logspout.1.wgwrytv5dnt8@swarm-manager000001    | #   kafka      kafka-1:9092                            map[topic:logs]
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.pumpLogs(): 6b53ae08c445 ignored: environ ignore
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.pumpLogs(): c05d779d98b6 ignored: log driver not supported
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.pumpLogs(): 61a00f27b1aa started
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.pumpLogs(): ca60c09c16b2 started
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.pumpLogs(): 802b3872793f started
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.pumpLogs(): 75b670376771 started
logspout.1.wgwrytv5dnt8@swarm-manager000001    | 2017/01/29 01:19:18 pump.pumpLogs(): cf81c5b84109 started

You can see it from the times it takes about 30s to start each producer, so for three producers, it takes over 1.5 minutes to start up.