Robert Nettleton created AMBARI-7242:
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Summary: Unnecessary conditional dependencies added to Blueprint
when NAGIOS_SERVER included
Key: AMBARI-7242
URL: https://issues.apache.org/jira/browse/AMBARI-7242
Project: Ambari
Issue Type: Bug
Components: ambari-server
Affects Versions: 1.6.1
Reporter: Robert Nettleton
Assignee: Robert Nettleton
Fix For: 1.7.0
If an Ambari Blueprint is posted that includes the "NAGIOS_SERVER" component in
a host group definition, some YARN-related dependencies are automatically added
to the blueprint, even if YARN is not referenced in the blueprint.
This means that a blueprint may have slightly different content after a POST,
so that the GET will return a blueprint with more components than originally
desired.
This problem is caused by the fact that some dependencies in Ambari are
conditional, and this type of dependency is not yet modeled in the Ambari Stack
Definitions. Whenever the NAGIOS_SERVER component is included, the
dependencies associated with that component (including YARN_CLIENT, TEZ_CLIENT,
etc) are also added to the blueprint during the creation process.
The Blueprint handling code needs to be modified in order to handle this
conditional type of dependency in the short term. As a longer-term fix,
eventually these dependencies should be included in the stack definitions.
I'll be posting a patch shortly that addresses this problem.
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