diff --git a/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java b/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java
index 33cc1d7bba1..9e8d7f7ba8f 100644
--- a/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java
+++ b/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java
@@ -33,6 +33,7 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.HashMap;
 import java.util.IdentityHashMap;
 import java.util.LinkedHashMap;
@@ -728,7 +729,9 @@ private static Field[] getFields(Class<?> recordClass, boolean excludeJava) {
     do {
       if (excludeJava && c.getPackage() != null && c.getPackage().getName().startsWith("java."))
         break; // skip java built-in classes
-      for (Field field : c.getDeclaredFields())
+      Field[] declaredFields = c.getDeclaredFields();
+      Arrays.sort(declaredFields, Comparator.comparing(Field::getName));
+      for (Field field : declaredFields)
         if ((field.getModifiers() & (Modifier.TRANSIENT | Modifier.STATIC)) == 0)
           if (fields.put(field.getName(), field) != null)
             throw new AvroTypeException(c + " contains two fields named: " + field);
diff --git a/lang/java/avro/src/test/java/org/apache/avro/reflect/TestReflect.java b/lang/java/avro/src/test/java/org/apache/avro/reflect/TestReflect.java
index c15daea6578..2555e9bf43a 100644
--- a/lang/java/avro/src/test/java/org/apache/avro/reflect/TestReflect.java
+++ b/lang/java/avro/src/test/java/org/apache/avro/reflect/TestReflect.java
@@ -1318,12 +1318,12 @@ private static class DocTest {
   public void testAvroDoc() {
     check(DocTest.class,
         "{\"type\":\"record\",\"name\":\"DocTest\",\"namespace\":\"org.apache.avro.reflect.TestReflect\","
-            + "\"doc\":\"DocTest class docs\","
-            + "\"fields\":[{\"name\":\"foo\",\"type\":\"int\",\"doc\":\"Some Documentation\"},"
+            + "\"doc\":\"DocTest class docs\"," + "\"fields\":["
+            + "{\"name\":\"defaultTest\",\"type\":{\"type\":\"record\",\"name\":\"DefaultTest\","
+            + "\"fields\":[{\"name\":\"foo\",\"type\":\"int\",\"default\":1}]},\"doc\":\"And again\"},"
             + "{\"name\":\"enums\",\"type\":{\"type\":\"enum\",\"name\":\"DocTestEnum\","
             + "\"symbols\":[\"ENUM_1\",\"ENUM_2\"]},\"doc\":\"Some other Documentation\"},"
-            + "{\"name\":\"defaultTest\",\"type\":{\"type\":\"record\",\"name\":\"DefaultTest\","
-            + "\"fields\":[{\"name\":\"foo\",\"type\":\"int\",\"default\":1}]},\"doc\":\"And again\"}]}");
+            + "{\"name\":\"foo\",\"type\":\"int\",\"doc\":\"Some Documentation\"}" + "]}");
   }
 
 }