@Override
  public boolean isRetriable() {
    return true;
  }
Trivial ctor to support Writable reflections instantiation
do not expect to use this object as-is, unless you call
readFields after using this ctor
hcatalog/webhcat/java-client/src/main/java/org/apache/hive/hcatalog/api/repl/commands/NoopCommand.java