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https://reviews.apache.org/r/32734/
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Review request for Ambari, Myroslav Papirkovskyy and Srimanth Gunturi.


Bugs: AMBARI-10316
    https://issues.apache.org/jira/browse/AMBARI-10316


Repository: ambari


Description
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When the POST call is made for recommending configuration-dependencies, we 
generate the services.json file with following extra content:
  "changed-configurations" : [ {
    "type" : "yarn-site",
    "name" : "yarn.scheduler.maximum-allocation-mb"
  } ],
  "depended-configurations" : [ {
    "type" : "mapred-site",
    "name" : "yarn.app.mapreduce.am.resource.mb"
  }, {
    "type" : "yarn-site",
    "name" : "yarn.scheduler.maximum-allocation-mb"
  }, {
    "type" : "mapred-site",
    "name" : "yarn.app.mapreduce.am.admin-command-opts"
  }, {
    "type" : "mapred-site",
    "name" : "mapreduce.map.memory.mb"
  }, {
    "type" : "mapred-site",
    "name" : "yarn.app.mapreduce.am.command-opts"
  }, {
    "type" : "mapred-site",
    "name" : "mapreduce.reduce.java.opts"
  }, {
    "type" : "mapred-site",
    "name" : "mapreduce.reduce.memory.mb"
  }, {
    "type" : "mapred-site",
    "name" : "mapreduce.task.io.sort.mb"
  }, {
    "type" : "mapred-site",
    "name" : "mapreduce.map.java.opts"
  } ]
The configuration depended-by should not be added on to the services.json like 
this. All the configuration dependencies should be got from manipulating the 
org.apache.ambari.server.api.services.stackadvisor.commands.StackAdvisorCommand.GET_SERVICES_INFO_URI
 value. Changing the value to include configuration depends_on and depended_by 
information. Then the python script should build the dependency-chain inside 
itself instead of doing it in Java and adding to services.json.
The reason this is important is that for future functionality, we need 
services.json and hosts.json to faithfully represent the cluster's services and 
hosts information. The custom stack-advisor scripts should have logic to 
interpret it for their own needs. If we do some processing in Java, then 
stack-providers will not have chance to make their own interpretations.


Diffs
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ambari-server/src/main/java/org/apache/ambari/server/api/services/AmbariMetaInfo.java
 3a7fb6a 
  
ambari-server/src/main/java/org/apache/ambari/server/api/services/stackadvisor/commands/StackAdvisorCommand.java
 a7646a0 
  
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/StackLevelConfigurationResourceProvider.java
 f010b37 
  ambari-server/src/main/resources/scripts/stack_advisor.py 1d67872 
  ambari-server/src/main/resources/stacks/stack_advisor.py c19a7ce 
  
ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java
 22bece8 
  ambari-server/src/test/python/stacks/2.2/common/test_stack_advisor.py 76ecc96 

Diff: https://reviews.apache.org/r/32734/diff/


Testing
-------

unt tests passed,


Thanks,

Dmytro Sen

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