[HUDI-484] Fix NPE when reading IncrementalPull.sqltemplate in HiveIncrementalPuller (#1167)

hudi-utilities/src/main/java/org/apache/hudi/utilities/HiveIncrementalPuller.java

@@ -112,7 +112,7 @@ public class HiveIncrementalPuller {
     this.config = config;
     validateConfig(config);
     String templateContent =
-        FileIOUtils.readAsUTFString(this.getClass().getResourceAsStream("IncrementalPull.sqltemplate"));
+        FileIOUtils.readAsUTFString(this.getClass().getResourceAsStream("/IncrementalPull.sqltemplate"));
     incrementalPullSQLtemplate = new ST(templateContent);
   }
 

hudi-utilities/src/test/java/org/apache/hudi/utilities/TestHiveIncrementalPuller.java

@@ -0,0 +1,27 @@
+package org.apache.hudi.utilities;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class TestHiveIncrementalPuller {
+
+  private HiveIncrementalPuller.Config config;
+
+  @Before
+  public void setup() {
+    config = new HiveIncrementalPuller.Config();
+  }
+
+  @Test
+  public void testInitHiveIncrementalPuller() {
+
+    try {
+      new HiveIncrementalPuller(config);
+    } catch (Exception e) {
+      Assert.fail("Unexpected exception while initing HiveIncrementalPuller, msg: " + e.getMessage());
+    }
+
+  }
+
+}