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https://reviews.apache.org/r/52876/
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Review request for Ambari and Tim Thorpe.


Bugs: AMBARI-18588
    https://issues.apache.org/jira/browse/AMBARI-18588


Repository: ambari


Description
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When YARN RM HTTP response is a 404, the response body is empty and this 
results in an empty responseMap, that later caused Ambari server to crash with 
NPE when it tries to read properties from the responseMap.

This JIRA proposes to set property values as null when the responseMap is null 
(due to empty body passed back from the YARN web server side).


Diffs
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ambari-server/src/main/java/org/apache/ambari/server/controller/internal/JsonHttpPropertyRequest.java
 6a93b4b 
  
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/URLStreamProvider.java
 c176ceb 

Diff: https://reviews.apache.org/r/52876/diff/


Testing
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1. existing unit testing
2. patch a cluster with the change


Thanks,

Di Li

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