UnresolvedAddressException being hit by Druid broker
<p>I'm new to <a href="http://druid.io/druid.html" rel="nofollow">Druid</a>. I've set up a cluster using the <a href="https://imply.io/technology" rel="nofollow">Imply IAP package</a>.
Events are being ingested into Druid from Kafka using <a href="https://github.com/druid-io/tranquility" rel="nofollow">Tranquility</a>. I can see that the events are being accepted by Tranquility - the following log statements are what I used to verify that:</p>

<pre><code>2016-10-03 19:19:22,715 [KafkaConsumer-CommitThread] INFO  c.m.tranquility.kafka.KafkaConsumer - Flushed {conn_recs={receivedCount=1, sentCount=1, droppedCount=0, unparseableCount=0}} pending messages in 32056ms and committed offsets in 15ms.
</code></pre>

<p>However, the broker seems to be hitting an exception when I try running a timeBoundary query on the datasource.</p>

<p>Following is the exception stack trace (copied from the broker's log):</p>

<pre><code>java.nio.channels.UnresolvedAddressException
  at sun.nio.ch.Net.checkAddress(Net.java:101) ~[?:1.8.0_66]
  at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:622) ~[?:1.8.0_66]
  at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:108) [netty-3.10.4.Final.jar:?]
  at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:70) [netty-3.10.4.Final.jar:?]
  at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:779) [netty-3.10.4.Final.jar:?]
  at org.jboss.netty.handler.codec.oneone.OneToOneEncoder.handleDownstream(OneToOneEncoder.java:54) [netty-3.10.4.Final.jar:?]
</code></pre>

<p>I've been stuck at this point for while since I'm not sure which logs/processes I need to look into to further debug this.</p>

<p><strong>Question:</strong> Could someone explain how I need to go about debugging such an issue - ie, any specific logs I need to look at, etc.?</p>

<p>Btw, I'm using a separate 3-node zookeeper cluster and a single node mysql instance as external dependencies for the druid cluster.</p>

<p>Please let me know if I need to provide more information.</p>

<p>Thanks,
Jithin</p>