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https://reviews.apache.org/r/45785/
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Review request for Ambari, Jayush Luniya and Sumit Mohanty.


Bugs: AMBARI-15726
    https://issues.apache.org/jira/browse/AMBARI-15726


Repository: ambari


Description
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Removing unknown host from cluster throws NPE. API call:
curl -u admin:admin  -H 'X-Requested-By: ambari' -X DELETE  
http://c6401.ambari.apache.org:8080/api/v1/clusters/a/hosts/c6402.ambari.apache.org
{
  "status": 500,
  "message": "Server Error"
}


Diffs
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ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClustersImpl.java
 6c1e56e 

Diff: https://reviews.apache.org/r/45785/diff/


Testing
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curl -u admin:admin  -H 'X-Requested-By: ambari' -X DELETE  
http://c6401.ambari.apache.org:8080/api/v1/clusters/a/hosts/c6402.ambari.apache.org
{
  "status" : 404,
  "message" : "org.apache.ambari.server.controller.spi.NoSuchResourceException: 
The specified resource doesn't exist: Host not found, 
hostname=c6402.ambari.apache.org"
}


Thanks,

Ajit Kumar

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