HIVE-25446: Wrong exception thrown if capacity<=0 (Ashish Sharma, rev…

…iewed by Nikhil Gupta, Adesh Rao)

Signed-off-by: Sankar Hariappan <sankarh@apache.org>
Closes (#3092)

ql/src/java/org/apache/hadoop/hive/ql/exec/vector/mapjoin/fast/VectorMapJoinFastHashTable.java

@@ -63,12 +63,12 @@ public void throwExpandError(int limit, String dataTypeName) {
   }
 
   private static void validateCapacity(long capacity) {
-    if (Long.bitCount(capacity) != 1) {
-      throw new AssertionError("Capacity must be a power of two " + capacity);
-    }
     if (capacity <= 0) {
       throw new AssertionError("Invalid capacity " + capacity);
     }
+    if (Long.bitCount(capacity) != 1) {
+      throw new AssertionError("Capacity must be a power of two " + capacity);
+    }
   }
 
   private static int nextHighestPowerOfTwo(int v) {