package me.prettyprint.cassandra.connection;

import java.io.Serializable;

public class NullOpTimer implements HOpTimer, Serializable {

  private static final long serialVersionUID = -4762728985083933452L;

  @Override
  public Object start() {
    return this;
  }

  @Override
  public void stop(Object token, String tagName, boolean success) {
  }

}

package me.prettyprint.cassandra.connection;

public class NullOpTimer implements HOpTimer {

  @Override
  public Object start() {
    return this;
  }

  @Override
  public void stop(Object token, String tagName, boolean success) {
  }

}

--- 
+++ 
@@ -1,6 +1,10 @@
 package me.prettyprint.cassandra.connection;
 
-public class NullOpTimer implements HOpTimer {
+import java.io.Serializable;
+
+public class NullOpTimer implements HOpTimer, Serializable {
+
+  private static final long serialVersionUID = -4762728985083933452L;
 
   @Override
   public Object start() {
Make default OpTimer serializable and fix build
