diff --git a/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/Program.java b/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/Program.java
index 844105c11..852e3d905 100644
--- a/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/Program.java
+++ b/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/Program.java
@@ -30,7 +30,9 @@ public static void main(final String[] args) {
       );
       printSummary(results, options.outputPath());
     } catch (final Exception ex) {
-      System.out.println("Benchmark failed: " + ex.getMessage());
+      System.err.println("Benchmark failed: " + ex.getMessage());
+      ex.printStackTrace();
+      System.exit(1);
     }
   }
 
diff --git a/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/model/Config.java b/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/model/Config.java
index d35a006ef..c83e68e5d 100644
--- a/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/model/Config.java
+++ b/esdk-performance-testing/benchmarks/java/src/main/java/com/amazon/esdk/benchmark/model/Config.java
@@ -3,6 +3,7 @@
 
 package com.amazon.esdk.benchmark.model;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
@@ -13,6 +14,8 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+// Other languages share this config file and add keys Java doesn't model.
+@JsonIgnoreProperties(ignoreUnknown = true)
 public final class Config {
 
   private static final Logger logger = LoggerFactory.getLogger(Config.class);