void onDeleteBlobError(Exception e) {
    onError(e);
    if (RouterUtils.isSystemHealthError(e)) {
      deleteBlobErrorCount.inc();
      operationErrorRate.mark();
    }
  }
Update appropriate metrics on a deleteBlob operation related error.
@param e the {@link Exception} associated with the error.
ambry-router/src/main/java/com/github/ambry/router/NonBlockingRouterMetrics.java