AMBARI-16751: Refresh stale host entity reference when deleting a service

Project: http://git-wip-us.apache.org/repos/asf/ambari/repo
Commit: http://git-wip-us.apache.org/repos/asf/ambari/commit/db7f6cb4
Tree: http://git-wip-us.apache.org/repos/asf/ambari/tree/db7f6cb4
Diff: http://git-wip-us.apache.org/repos/asf/ambari/diff/db7f6cb4

Branch: refs/heads/branch-2.4
Commit: db7f6cb4527e3651545a8be1144465600f13868b
Parents: 4bd3951
Author: Nahappan Somasundaram <nsomasunda...@hortonworks.com>
Authored: Thu May 19 07:24:46 2016 -0700
Committer: Nahappan Somasundaram <nsomasunda...@hortonworks.com>
Committed: Tue May 24 11:36:41 2016 -0700

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 .../ambari/server/orm/dao/HostComponentDesiredStateDAO.java   | 7 ++++++-
 .../server/orm/dao/HostComponentDesiredStateDAOTest.java      | 4 +++-
 2 files changed, 9 insertions(+), 2 deletions(-)
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http://git-wip-us.apache.org/repos/asf/ambari/blob/db7f6cb4/ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAO.java
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diff --git 
a/ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAO.java
 
b/ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAO.java
index 46da9da..176e15b 100644
--- 
a/ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAO.java
+++ 
b/ambari-server/src/main/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAO.java
@@ -95,7 +95,12 @@ public class HostComponentDesiredStateDAO {
 
   @Transactional
   public void remove(HostComponentDesiredStateEntity 
hostComponentDesiredStateEntity) {
-    HostEntity hostEntity = hostComponentDesiredStateEntity.getHostEntity();
+    HostEntity hostEntity = 
hostDAO.findById(hostComponentDesiredStateEntity.getHostId());
+
+    if (hostEntity == null) {
+      throw new IllegalStateException(String.format("Missing hostEntity for 
host id %1d",
+              hostComponentDesiredStateEntity.getHostId()));
+    }
 
     entityManagerProvider.get().remove(merge(hostComponentDesiredStateEntity));
 

http://git-wip-us.apache.org/repos/asf/ambari/blob/db7f6cb4/ambari-server/src/test/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAOTest.java
----------------------------------------------------------------------
diff --git 
a/ambari-server/src/test/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAOTest.java
 
b/ambari-server/src/test/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAOTest.java
index b7a0677..28adb8c 100644
--- 
a/ambari-server/src/test/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAOTest.java
+++ 
b/ambari-server/src/test/java/org/apache/ambari/server/orm/dao/HostComponentDesiredStateDAOTest.java
@@ -48,7 +48,7 @@ public class HostComponentDesiredStateDAOTest {
     HostEntity hostEntity = createNiceMock(HostEntity.class);
     
     HostComponentDesiredStateEntity hostComponentDesiredStateEntity = 
createNiceMock(HostComponentDesiredStateEntity.class);
-    
expect(hostComponentDesiredStateEntity.getHostEntity()).andReturn(hostEntity);
+    
expect(hostComponentDesiredStateEntity.getHostId()).andReturn(1L).anyTimes();
     expect(entityManagerProvider.get()).andReturn(entityManager).anyTimes();
 
     
expect(entityManager.merge(hostComponentDesiredStateEntity)).andReturn(hostComponentDesiredStateEntity).anyTimes();
@@ -58,6 +58,8 @@ public class HostComponentDesiredStateDAOTest {
 
     expect(hostDAO.merge(hostEntity)).andReturn(hostEntity).anyTimes();
 
+    expect(hostDAO.findById(1L)).andReturn(hostEntity).anyTimes();
+
     replay(entityManagerProvider, entityManager, hostDAO, hostEntity, 
hostComponentDesiredStateEntity);
 
     HostComponentDesiredStateDAO dao = new HostComponentDesiredStateDAO();

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