diff --git a/hadoop/src/main/java/water/hadoop/h2odriver.java b/hadoop/src/main/java/water/hadoop/h2odriver.java
index <HASH>..<HASH> 100644
--- a/hadoop/src/main/java/water/hadoop/h2odriver.java
+++ b/hadoop/src/main/java/water/hadoop/h2odriver.java
@@ -138,7 +138,7 @@ public class h2odriver extends Configured implements Tool {
           Thread.sleep(1000);
         }
       }
-      catch (Exception _) {
+      catch (Exception e) {
       }
       finally {
         if (! killed) {
diff --git a/hadoop/src/main/java/water/hadoop/h2omapper.java b/hadoop/src/main/java/water/hadoop/h2omapper.java
index <HASH>..<HASH> 100644
--- a/hadoop/src/main/java/water/hadoop/h2omapper.java
+++ b/hadoop/src/main/java/water/hadoop/h2omapper.java
@@ -78,9 +78,9 @@ public class h2omapper extends Mapper<Text, Text, Text, Text> {
         try {
           e.printStackTrace();
         }
-        catch (Exception _) {
+        catch (Exception e2) {
           System.err.println("_context.write excepted in UserMain");
-          _.printStackTrace();
+          e2.printStackTrace();
         }
       }
       finally {
Rename swallowed exceptions to not be named _.  Java 8 change.
No semantic change.