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From Jeff Gong <j.gon...@gmail.com>
Subject Re: Launch Kafka/Zookeeper servers without using command line
Date Fri, 10 Jul 2015 17:09:39 GMT
To follow up and provide a little more context on my second bullet point,
when I run any command for the first time on command line that requires
connecting to this code instantiated ZK server I get the specific error:

> bin/kafka-topics.sh --list --zookeeper localhost:2181

java.net.ConnectException: Connection refused

at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)


at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)

But after that it looks like a reconnect is attempted, which succeeds and
I'll get a list of my topics or my console consumer will succeed, etc. If I
were to run any of those commands a second time, this error then
disappears. Anyone have any ideas?

On Thu, Jul 9, 2015 at 4:20 PM, Jeff Gong <j.gong16@gmail.com> wrote:

> Hey Gwen,
> Thanks for your response. The example was very helpful and exactly what I
> was looking for! I went ahead and used that as an example and while most
> things are working as I wanted, there are a few issues I'd like to follow
> up on:
> 1. If I launch a Zookeeper/Kafka server from code instead of command line,
> most of the helpful debugging/status messages will not be displayed -- is
> there any way I can retain this functionality?
> 2. I created a scenario where I successfully launched a Zookeeper instance
> from code, then connected to that Zookeeper server using a Kafka Server via
> command line. I then instantiated both a Kafka-Console-Consumer and
> Kafka-Console-Producer with the topic 'test'. I was able to send messages
> to the consumer as expected, but I noticed that when I try to connect the
> console consumer to the server I always get a 'Connection Refused' error to
> my Kafka Broker. Any ideas why this might be occuring?
> Best,
> Jeff
> On Tue, Jul 7, 2015 at 10:43 AM, Jeff Gong <j.gong16@gmail.com> wrote:
>> Hi all,
>> Is it possible to launch Kafka/Zookeeper servers via some part of the
>> API? I noticed in this:
>> http://stackoverflow.com/questions/16946778/how-can-we-create-a-topic-in-kafka-from-the-ide-using-api/
>> that it seems to be possible to create a ZK instance and add a topic to it,
>> but is this the same as launching the ZK server as we would in the command
>> line?
>> Similarly, would it be possible to do this for a Kafka server and have it
>> connect to an existing ZK connection?
>> Thanks!

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