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https://reviews.apache.org/r/48972/
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Review request for Ambari, Florian Barca, Jonathan Hurley, and Nate Cole.


Bugs: AMBARI-17253
    https://issues.apache.org/jira/browse/AMBARI-17253


Repository: ambari


Description
-------

There are too many WARNING in ZooKeeper log.
```
2016-06-15 21:02:15,405 - WARN  
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of 
stream exception
EndOfStreamException: Unable to read additional data from client sessionid 0x0, 
likely client has closed socket
        at 
org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
        at java.lang.Thread.run(Thread.java:745)
```

It may be because of Ambari Alert. Ambari Alert pings to the zookeeper port to 
do monitoring.
We should use 'ruok' to monitor zookeepers.


Diffs
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  ambari-agent/src/main/python/ambari_agent/alerts/port_alert.py 1918327 
  ambari-agent/src/test/python/ambari_agent/TestPortAlert.py dffa56c 

Diff: https://reviews.apache.org/r/48972/diff/


Testing
-------

mvn clean test

```
+1 overall. Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12811835/AMBARI-17253.2.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 1 new or modified test files.
+1 javac. The applied patch does not increase the total number of javac 
compiler warnings.
+1 release audit. The applied patch does not increase the total number of 
release audit warnings.
+1 core tests. The patch passed unit tests in .
Test results: 
https://builds.apache.org/job/Ambari-trunk-test-patch/7427//testReport/
Console output: 
https://builds.apache.org/job/Ambari-trunk-test-patch/7427//console
This message is automatically generated.
```


Thanks,

Masahiro Tanaka

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