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From "Robert Nettleton" <>
Subject Re: Review Request 29914: Support Kafka clusters via Blueprints without Ganglia
Date Thu, 15 Jan 2015 14:06:16 GMT

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(Updated Jan. 15, 2015, 2:06 p.m.)

Review request for Ambari, John Speidel and Robert Levas.

Bugs: AMBARI-9139

Repository: ambari

Description (updated)

This patch addresses AMBARI-9139.

Blueprints that included Kafka, but not Ganglia, were failing
  due to an issue in the BlueprintConfigurationProcessor.

The BlueprintConfigurationProcessor was failing during an
  attempt to perform hostname substitution on a kafka-broker
  property, which is mapped to the
  GANGLIA_SERVER's hostname.  If GANGLIA_SERVER is not
  included in the cluster, the Blueprint deployment
  will fail.

This patch addresses this issue by:

 - Modifying the property updater registration for the kafka
   property that is mapped to the GANGLIA_SERVER component, such
   that the property will use hostname substitution when
   Ganglia is present, and will return the original stack-defined
   value when Ganglia is not present in the cluster.

 - Adds assertions to some existing unit tests to verify that
   this Kafka configuration property is handled correctly in
   the cases of when Ganglia is or is not present in the





1. Ran the ambari-server unit tests (all passing).
2. Manually verified that a Blueprint deployment of a cluster that includes Kafka, but not
Ganglia, will succeed. 


Robert Nettleton

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