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https://reviews.apache.org/r/33920/
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Review request for Aurora, Kevin Sweeney and Zameer Manji.


Repository: aurora


Description
-------

This flag has a long thread that lands in `TwitterKazooClient`.  The proposed 
change will mean that INFO-level ZooKeeper client logging is never shown.

Zameer notes that this regressed in https://reviews.apache.org/r/32905, where 
he decided that the verbose kwarg was effectively ineffective, and he defaulted 
to True for safety.


Diffs
-----

  src/main/python/apache/aurora/client/cli/context.py 
146960ec4a4a5e958075990085cb1bb58a51eff0 

Diff: https://reviews.apache.org/r/33920/diff/


Testing
-------

Before:
```
$ aurora update start devcluster/vagrant/test/http_example 
/vagrant/src/test/sh/org/apache/aurora/e2e/http/http_example.aurora --watch
 INFO] Starting update for: http_example
 INFO] Connecting to 192.168.33.7:2181
 INFO] Sending request(xid=None): Connect(protocol_version=0, last_zxid_seen=0, 
time_out=10000, session_id=0, 
passwd='\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00', 
read_only=None)
 INFO] Zookeeper connection established, state: CONNECTED
 INFO] Sending request(xid=1): GetChildren(path=u'/aurora/scheduler', 
watcher=<function get_watch at 0x7f06783a8938>)
 INFO] Received response(xid=1): [u'member_0000000011', 
u'singleton_candidate_0000000010']
 INFO] Sending request(xid=2): 
GetData(path=u'/aurora/scheduler/member_0000000011', watcher=None)
 INFO] Received response(xid=2): 
('{"serviceEndpoint":{"host":"192.168.33.7","port":8081},"additionalEndpoints":{"http":{"host":"192.168.33.7","port":8081}},"status":"ALIVE"}',
 ZnodeStat(czxid=351, mzxid=351, ctime=1430942244998, mtime=1430942244998, 
version=0, cversion=0, aversion=0, ephemeralOwner=93778139510669447, 
dataLength=139, numChildren=0, pzxid=351))
 INFO] Sending request(xid=3): GetChildren(path=u'/aurora/scheduler', 
watcher=None)
 INFO] Received response(xid=3): [u'member_0000000011', 
u'singleton_candidate_0000000010']
 INFO] Sending request(xid=4): Close()
 INFO] Closing connection to 192.168.33.7:2181
 INFO] Zookeeper session lost, state: CLOSED
Job update has started. View your update progress at 
http://192.168.33.7:8081/scheduler/vagrant/test/http_example/0cce84b1-36d8-4a44-95ec-8c2cee02b8ca
Entered state ROLLING_FORWARD
Entered state ROLLED_FORWARD
```

After:
```
$ aurora update start devcluster/vagrant/test/http_example 
/vagrant/src/test/sh/org/apache/aurora/e2e/http/http_example_updated.aurora 
--watch
 INFO] Starting update for: http_example
Job update has started. View your update progress at 
http://192.168.33.7:8081/scheduler/vagrant/test/http_example/f8d7bd24-b44c-41a0-aacb-f4a0568a7fff
Entered state ROLLING_FORWARD
Entered state ROLLED_FORWARD
```


Thanks,

Bill Farner

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