@Override
  public String getNextDatacenter() {
    return nextDatacenter;
  }
@param throwable The {@link Throwable} thrown in execution of retrying.
@return {@code true} if the {@link Throwable} is {@link RestServiceException} and Get request return not found.
ambry-named-mysql/src/main/java/com/github/ambry/named/GetTransactionStateTracker.java