diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSBuilder.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSBuilder.java
index 81a14e97be5..175df15a543 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSBuilder.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSBuilder.java
@@ -78,7 +78,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #opt(String, String)
    */
-  B opt(@Nonnull String key, boolean value);
+  default B opt(@Nonnull String key, boolean value) {
+    return opt(key, Boolean.toString(value));
+  }
 
   /**
    * Set optional int parameter for the Builder.
@@ -88,7 +90,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #opt(String, String)
    */
-  B opt(@Nonnull String key, int value);
+  default B opt(@Nonnull String key, int value) {
+    return optLong(key, value);
+  }
 
   /**
    * This parameter is converted to a long and passed
@@ -102,7 +106,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @deprecated use {@link #optDouble(String, double)}
    */
   @Deprecated
-  B opt(@Nonnull String key, float value);
+  default B opt(@Nonnull String key, float value) {
+    return optLong(key, (long) value);
+  }
 
   /**
    * Set optional long parameter for the Builder.
@@ -112,7 +118,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @deprecated use  {@link #optLong(String, long)} where possible.
    */
-  B opt(@Nonnull String key, long value);
+  default B opt(@Nonnull String key, long value) {
+    return optLong(key, value);
+  }
 
   /**
    * Pass an optional double parameter for the Builder.
@@ -126,7 +134,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @deprecated use {@link #optDouble(String, double)}
    */
   @Deprecated
-  B opt(@Nonnull String key, double value);
+  default B opt(@Nonnull String key, double value) {
+    return optLong(key, (long) value);
+  }
 
   /**
    * Set an array of string values as optional parameter for the Builder.
@@ -146,7 +156,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #opt(String, String)
    */
-  B optLong(@Nonnull String key, long value);
+  default B optLong(@Nonnull String key, long value) {
+    return opt(key, Long.toString(value));
+  }
 
   /**
    * Set optional double parameter for the Builder.
@@ -156,7 +168,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #opt(String, String)
    */
-  B optDouble(@Nonnull String key, double value);
+  default B optDouble(@Nonnull String key, double value) {
+    return opt(key, Double.toString(value));
+  }
 
   /**
    * Set mandatory option to the Builder.
@@ -178,7 +192,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #must(String, String)
    */
-  B must(@Nonnull String key, boolean value);
+  default B must(@Nonnull String key, boolean value) {
+    return must(key, Boolean.toString(value));
+  }
 
   /**
    * Set mandatory int option.
@@ -188,7 +204,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #must(String, String)
    */
-  B must(@Nonnull String key, int value);
+  default B must(@Nonnull String key, int value) {
+    return mustLong(key, value);
+  }
 
   /**
    * This parameter is converted to a long and passed
@@ -201,7 +219,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @deprecated use {@link #mustDouble(String, double)} to set floating point.
    */
   @Deprecated
-  B must(@Nonnull String key, float value);
+  default B must(@Nonnull String key, float value) {
+    return mustLong(key, (long) value);
+  }
 
   /**
    * Set mandatory long option.
@@ -212,7 +232,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @see #must(String, String)
    */
   @Deprecated
-  B must(@Nonnull String key, long value);
+  default B must(@Nonnull String key, long value) {
+    return mustLong(key, (long) value);
+  }
 
   /**
    * Set mandatory long option, despite passing in a floating
@@ -224,7 +246,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @see #must(String, String)
    */
   @Deprecated
-  B must(@Nonnull String key, double value);
+  default B must(@Nonnull String key, double value) {
+    return mustLong(key, (long) value);
+  }
 
   /**
    * Set a string array as mandatory option.
@@ -244,7 +268,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #opt(String, String)
    */
-  B mustLong(@Nonnull String key, long value);
+  default B mustLong(@Nonnull String key, long value) {
+    return must(key, Long.toString(value));
+  }
 
   /**
    * Set mandatory double parameter for the Builder.
@@ -254,7 +280,9 @@ public interface FSBuilder<S, B extends FSBuilder<S, B>> {
    * @return generic type B.
    * @see #opt(String, String)
    */
-  B mustDouble(@Nonnull String key, double value);
+  default B mustDouble(@Nonnull String key, double value) {
+    return must(key, Double.toString(value));
+  }
 
   /**
    * Instantiate the object which was being built.
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/AbstractFSBuilderImpl.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/AbstractFSBuilderImpl.java
index 47cf98f4746..108b60256ef 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/AbstractFSBuilderImpl.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/AbstractFSBuilderImpl.java
@@ -190,12 +190,12 @@ public abstract class
    * @see #opt(String, String)
    */
   @Override
-  public final B opt(@Nonnull final String key, int value) {
+  public B opt(@Nonnull final String key, int value) {
     return optLong(key, value);
   }
 
   @Override
-  public final B opt(@Nonnull final String key, final long value) {
+  public B opt(@Nonnull final String key, final long value) {
     return optLong(key, value);
   }
 
@@ -210,7 +210,7 @@ public abstract class
    * @see #opt(String, String)
    */
   @Override
-  public final B opt(@Nonnull final String key, float value) {
+  public B opt(@Nonnull final String key, float value) {
     return optLong(key, (long) value);
   }
 
@@ -220,7 +220,7 @@ public abstract class
    * @see #opt(String, String)
    */
   @Override
-  public final B opt(@Nonnull final String key, double value) {
+  public B opt(@Nonnull final String key, double value) {
     return optLong(key, (long) value);
   }
 
@@ -291,22 +291,22 @@ public abstract class
    * @see #must(String, String)
    */
   @Override
-  public final B must(@Nonnull final String key, int value) {
+  public B must(@Nonnull final String key, int value) {
     return mustLong(key, value);
   }
 
   @Override
-  public final B must(@Nonnull final String key, final long value) {
+  public B must(@Nonnull final String key, final long value) {
     return mustLong(key, value);
   }
 
   @Override
-  public final B must(@Nonnull final String key, final float value) {
+  public B must(@Nonnull final String key, final float value) {
     return mustLong(key, (long) value);
   }
 
   @Override
-  public final B must(@Nonnull final String key, double value) {
+  public B must(@Nonnull final String key, double value) {
     return mustLong(key, (long) value);
   }
 
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/store/TestFSBuilderSupport.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/store/TestFSBuilderSupport.java
index 20172ccfe16..c34cdbe0ae5 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/store/TestFSBuilderSupport.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/store/TestFSBuilderSupport.java
@@ -20,11 +20,12 @@ package org.apache.hadoop.fs.store;
 
 import java.io.IOException;
 
+import javax.annotation.Nonnull;
+
 import org.junit.Test;
 
+import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSBuilder;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.fs.impl.AbstractFSBuilderImpl;
 import org.apache.hadoop.fs.impl.FSBuilderSupport;
 import org.apache.hadoop.test.AbstractHadoopTestBase;
 
@@ -127,18 +128,45 @@ public class TestFSBuilderSupport extends AbstractHadoopTestBase {
       extends FSBuilder<FSBuilderSupport, SimpleBuilder> {
   }
 
+  /**
+   * This is a minimal builder which relies on default implementations of the interface.
+   * If it ever stops compiling, it means a new interface has been added which
+   * is not backwards compatible with external implementations, such as that
+   * in HBoss (see HBASE-26483).
+   *
+   */
   private static final class BuilderImpl
-      extends AbstractFSBuilderImpl<FSBuilderSupport, SimpleBuilder>
       implements SimpleBuilder {
+    private final Configuration options = new Configuration(false);
 
-    private BuilderImpl() {
-      super(new Path("/"));
+    @Override
+    public SimpleBuilder opt(@Nonnull final String key, @Nonnull final String value) {
+      options.set(key, value);
+      return this;
+    }
+
+    @Override
+    public SimpleBuilder opt(@Nonnull final String key, @Nonnull final String... values) {
+      options.setStrings(key, values);
+      return this;
+    }
+
+    @Override
+    public SimpleBuilder must(@Nonnull final String key, @Nonnull final String value) {
+      return opt(key, value);
+    }
+
+    @Override
+    public SimpleBuilder must(@Nonnull final String key, @Nonnull final String... values) {
+      return opt(key, values);
     }
 
     @Override
     public FSBuilderSupport build()
-        throws IOException {
-      return new FSBuilderSupport(getOptions());
+        throws IllegalArgumentException, UnsupportedOperationException, IOException {
+      return new FSBuilderSupport(options);
     }
   }
+
+
 }