tkuhlman/ansible-kafka — pull request #1 by tphummel (2014-10-16 22:45:00+00:00)
Title: server.properties: do existence check on ‘kafka_listen_address’

was getting this error prior to fix:

```
TASK: [kafka | create server.properties] **************************************
<192.168.33.19> ESTABLISH CONNECTION FOR USER: vagrant
<192.168.33.19> EXEC ssh -C -tt -vvv -o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s -o ControlPath=/Users/tom/.ansible/cp/ansible-ssh-%h-%p-%r -o StrictHostKeyChecking=no -o IdentityFile="/Users/tom/.vagrant.d/insecure_private_key" -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=vagrant -o ConnectTimeout=10 192.168.33.19 /bin/sh -c 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1413498244.14-110580405837030 && chmod a+rx $HOME/.ansible/tmp/ansible-tmp-1413498244.14-110580405837030 && echo $HOME/.ansible/tmp/ansible-tmp-1413498244.14-110580405837030'
fatal: [kafka1] => {'msg': "AnsibleUndefinedVariable: One or more undefined variables: 'kafka_listen_address' is undefined", 'failed': True}
fatal: [kafka1] => {'msg': "AnsibleUndefinedVariable: One or more undefined variables: 'kafka_listen_address' is undefined", 'failed': True}

FATAL: all hosts have already failed -- aborting

PLAY RECAP ********************************************************************
to retry, use: --limit @/Users/tom/servers.retry

kafka1 : ok=47 changed=37 unreachable=1 failed=0

Ansible failed to complete successfully. Any error output should be
visible above. Please fix these errors and try again.
```