@Override
  public boolean release() {

    if (response != null) {
      ReferenceCountUtil.safeRelease(response);
      response = null;
    }

    if (content != null) {
      ReferenceCountUtil.safeRelease(content);
      content = null;
    }
    return false;
  }
Override the release method since we also need to release {@link ResponseInfo#response} in case it is not null.
@return
ambry-api/src/main/java/com/github/ambry/network/ResponseInfo.java