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https://reviews.apache.org/r/36697/
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(Updated July 22, 2015, 6:29 p.m.)


Review request for Aurora and Zameer Manji.


Bugs: AURORA-1405
    https://issues.apache.org/jira/browse/AURORA-1405


Repository: aurora


Description
-------

Added fix for Aurora client to connect to correct zookeeper-hosts address/port 
pairs.

When more than one zookeeper host was specified in the clusters.json file, only 
the last host was accessed through the specified zk_port. The client would 
attempt to connect to all other zookeeper hosts using the default port (2181).

For example, in clusters.json:
[{
  "name": "<my_cluster>",
  "zk": "host1.domain.com,host2.domain.com,host3.domain.com",
  "zk_port": 2626,
  "scheduler_zk_path": "/cluster/aurora/scheduler",
  "slave_run_directory": "latest"
}
...
]
I found that the client would attempt to access the zk hosts addresses 
host1.domain.com:2181, host1.domain.com:2181, and host3.domain.com:2626. Thus, 
the "zk_port" attribute would only update the last host in the host 
string-list. This change allows the client to properly connect to multiple 
zookeeper hosts using a port other than the specified port.

Note, that the KazooClient accepts a comma-separated string of hosts.


Diffs
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  src/main/python/apache/aurora/client/api/scheduler_client.py 
b8361b82476416d2d7370ab6b170423945d0b4a2 

Diff: https://reviews.apache.org/r/36697/diff/


Testing
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This is a simple change, but tested to make sure client can still connect to 
each zookeeper host. Then verified that all hosts are now accessed through the 
correct port, not just the default (port 2181). Also viewable by Aurora client 
INFO logs.


Thanks,

Zane Silver

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