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https://reviews.apache.org/r/46332/
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Review request for Ambari, Nate Cole and Robert Levas.


Bugs: AMBARI-15942
    https://issues.apache.org/jira/browse/AMBARI-15942


Repository: ambari


Description
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Caused by newly added hosts not having an ID and an internal map not being 
updated correctly.

- Deploy 2.4.0.0 cluster with Ambari 222 (secure, non-HA cluster)
- Add a new host to the cluster. The newly added host has following components: 
DataNode, SmartSense HST Agent, Kerberos Client, Metrics Monitor
- Register 2.4.2.0-221 version and install the bits
- Start EU  or RU

```
18 Apr 2016 05:21:37,172 ERROR [qtp-ambari-client-613] CheckHelper:120 - Check 
SERVICES_UP failed
org.apache.ambari.server.HostNotFoundException: Host not found, hostname=Host 
Id = 51
        at 
org.apache.ambari.server.state.cluster.ClustersImpl.getHostById(ClustersImpl.java:404)
        at 
org.apache.ambari.server.checks.ServicesUpCheck.isConsideredDown(ServicesUpCheck.java:208)
```


Diffs
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  ambari-server/src/main/java/org/apache/ambari/server/state/Clusters.java 
59dcaf8 
  
ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClustersImpl.java
 dcbf5a5 
  ambari-server/src/main/java/org/apache/ambari/server/state/host/HostImpl.java 
186590e 
  
ambari-server/src/test/java/org/apache/ambari/server/state/cluster/ClustersTest.java
 b563268 

Diff: https://reviews.apache.org/r/46332/diff/


Testing
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mvn clean test


Thanks,

Jonathan Hurley

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