diff --git a/modules/lang-painless/src/main/java/org/elasticsearch/painless/Def.java b/modules/lang-painless/src/main/java/org/elasticsearch/painless/Def.java
index 7cc3d2f870e..e5967501664 100644
--- a/modules/lang-painless/src/main/java/org/elasticsearch/painless/Def.java
+++ b/modules/lang-painless/src/main/java/org/elasticsearch/painless/Def.java
@@ -72,14 +72,24 @@ public final class Def {
 
         private static final MethodHandle OBJECT_ARRAY_MH = ARRAY_TYPE_MH_MAPPING.get(Object[].class);
 
+        // NOTE: the following are actually used, javac just does not know :)
+        @SuppressWarnings("unused")
         static int getArrayLength(final boolean[] array) { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final byte[] array)    { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final short[] array)   { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final int[] array)     { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final long[] array)    { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final char[] array)    { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final float[] array)   { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final double[] array)  { return array.length; }
+        @SuppressWarnings("unused")
         static int getArrayLength(final Object[] array)  { return array.length; }
 
         static MethodHandle arrayLengthGetter(Class<?> arrayType) {
diff --git a/modules/lang-painless/src/main/java/org/elasticsearch/painless/PainlessScriptEngineService.java b/modules/lang-painless/src/main/java/org/elasticsearch/painless/PainlessScriptEngineService.java
index 4c627d08eca..72a657cd7f0 100644
--- a/modules/lang-painless/src/main/java/org/elasticsearch/painless/PainlessScriptEngineService.java
+++ b/modules/lang-painless/src/main/java/org/elasticsearch/painless/PainlessScriptEngineService.java
@@ -204,7 +204,7 @@ public final class PainlessScriptEngineService extends AbstractComponent impleme
      * Action taken when the engine is closed.
      */
     @Override
-    public void close() throws IOException {
+    public void close() {
         // Nothing to do.
     }
 }
diff --git a/modules/lang-painless/src/main/java/org/elasticsearch/painless/node/EUnary.java b/modules/lang-painless/src/main/java/org/elasticsearch/painless/node/EUnary.java
index 409d1081ae9..7e52790fa50 100644
--- a/modules/lang-painless/src/main/java/org/elasticsearch/painless/node/EUnary.java
+++ b/modules/lang-painless/src/main/java/org/elasticsearch/painless/node/EUnary.java
@@ -147,7 +147,6 @@ public final class EUnary extends AExpression {
         if (child.constant != null) {
             final Sort sort = promote.sort;
 
-
             if (sort == Sort.INT) {
                 constant = -(int)child.constant;
             } else if (sort == Sort.LONG) {
diff --git a/modules/lang-painless/src/test/java/org/elasticsearch/painless/NeedsScoreTests.java b/modules/lang-painless/src/test/java/org/elasticsearch/painless/NeedsScoreTests.java
index 4b56d9751b6..3fe071c5221 100644
--- a/modules/lang-painless/src/test/java/org/elasticsearch/painless/NeedsScoreTests.java
+++ b/modules/lang-painless/src/test/java/org/elasticsearch/painless/NeedsScoreTests.java
@@ -60,6 +60,7 @@ public class NeedsScoreTests extends ESSingleNodeTestCase {
         ss = service.search(new CompiledScript(ScriptType.INLINE, "randomName", "painless", compiled),
                             lookup, Collections.<String, Object>emptyMap());
         assertTrue(ss.needsScores());
+        service.close();
     }
 
 }