AMBARI-7144. On Enable HA on a 3 node cluster - popup on warning for NN and SNN on same node appears.

ambari-server/src/main/resources/stacks/HDP/2.0.6/services/stack_advisor.py

@@ -37,14 +37,6 @@ class HDP206StackAdvisor(DefaultStackAdvisor):
     nameNodeHosts = [component["StackServiceComponents"]["hostnames"] for component in componentsList if component["StackServiceComponents"]["component_name"] == "NAMENODE"]
     secondaryNameNodeHosts = [component["StackServiceComponents"]["hostnames"] for component in componentsList if component["StackServiceComponents"]["component_name"] == "SECONDARY_NAMENODE"]
 
-    if hostsCount > 1 and len(nameNodeHosts) > 0 and len(secondaryNameNodeHosts) > 0:
-      nameNodeHosts = nameNodeHosts[0]
-      secondaryNameNodeHosts = secondaryNameNodeHosts[0]
-      commonHosts = list(set(nameNodeHosts).intersection(secondaryNameNodeHosts))
-      for host in commonHosts:
-        items.append( { "type": 'host-component', "level": 'WARN', "message": 'NameNode and Secondary NameNode should not be hosted on same machine', "component-name": 'NAMENODE', "host": str(host) } )
-        items.append( { "type": 'host-component', "level": 'WARN', "message": 'NameNode and Secondary NameNode should not be hosted on same machine', "component-name": 'SECONDARY_NAMENODE', "host": str(host) } )
-
     # Validating cardinality
     for component in componentsList:
       if component["StackServiceComponents"]["cardinality"] is not None:

ambari-server/src/test/python/stacks/2.0.6/common/test_stack_advisor.py

@@ -85,7 +85,7 @@ class TestHDP206StackAdvisor(TestCase):
     }
     self.assertHostLayout(expectedComponentsHostsMap, result)
 
-  def test_validationNamenodeAndSecondaryNamenode2Hosts(self):
+  def test_validationNamenodeAndSecondaryNamenode2Hosts_noMessagesForSameHost(self):
     servicesInfo = [
       {
         "name": "HDFS",
@@ -99,8 +99,6 @@ class TestHDP206StackAdvisor(TestCase):
     result = self.stackAdvisor.validateComponentLayout(services, hosts)
 
     expectedItems = [
-      {"message": "NameNode and Secondary NameNode should not be hosted on same machine", "level": "WARN", "host": "host1"},
-      {"message": "NameNode and Secondary NameNode should not be hosted on same machine", "level": "WARN", "host": "host1"},
       {"message": "Host is not used", "level": "ERROR", "host": "host2"}
     ]
     self.assertValidationResult(expectedItems, result)