ATLAS-1053: Fix for issues flagged by Coverity scan - potential NPE

addons/hive-bridge/src/main/java/org/apache/atlas/hive/bridge/HiveMetaStoreBridge.java

@@ -123,7 +123,10 @@ public class HiveMetaStoreBridge {
         List<String> databases = hiveClient.getAllDatabases();
         for (String databaseName : databases) {
             Referenceable dbReference = registerDatabase(databaseName);
-            importTables(dbReference, databaseName, failOnError);
+
+            if (dbReference != null) {
+                importTables(dbReference, databaseName, failOnError);
+            }
         }
     }
 
@@ -146,13 +149,16 @@ public class HiveMetaStoreBridge {
     private Referenceable registerDatabase(String databaseName) throws Exception {
         Referenceable dbRef = getDatabaseReference(clusterName, databaseName);
         Database db = hiveClient.getDatabase(databaseName);
-        if (dbRef == null) {
-            dbRef = createDBInstance(db);
-            dbRef = registerInstance(dbRef);
-        } else {
-            LOG.info("Database {} is already registered with id {}. Updating it.", databaseName, dbRef.getId().id);
-            dbRef = createOrUpdateDBInstance(db, dbRef);
-            updateInstance(dbRef);
+
+        if (db != null) {
+            if (dbRef == null) {
+                dbRef = createDBInstance(db);
+                dbRef = registerInstance(dbRef);
+            } else {
+                LOG.info("Database {} is already registered with id {}. Updating it.", databaseName, dbRef.getId().id);
+                dbRef = createOrUpdateDBInstance(db, dbRef);
+                updateInstance(dbRef);
+            }
         }
         return dbRef;
     }

addons/hive-bridge/src/main/java/org/apache/atlas/hive/hook/HiveHook.java

@@ -499,6 +499,9 @@ public class HiveHook extends AtlasHook implements ExecuteWithHookContext {
 
         if (db != null) {
             db = dgiBridge.hiveClient.getDatabase(db.getName());
+        }
+
+        if (db != null) {
             Referenceable dbEntity = dgiBridge.createDBInstance(db);
 
             entities.add(dbEntity);

release-log.txt

@@ -6,6 +6,7 @@ INCOMPATIBLE CHANGES:
 
 
 ALL CHANGES:
+ATLAS-1053 Fix issues flagged by Coverity scan - potential NPE (mneethiraj via sumasai)
 ATLAS-1052 Fix NPE in HiveHook due to null Session State (sumasai)
 ATLAS-1051 Sqoop Hook does not package HDFS model jars which is required (sumasai)
 ATLAS-1049 List types by supertype (shwethags via sumasai)