Read repair is not blocking repair to finish in foreground repair

public void close()
        {
            try
            {
                FBUtilities.waitOnFutures(repairResults, DatabaseDescriptor.getWriteRpcTimeout());
            }
            catch (TimeoutException ex)
            {
                // We got all responses, but timed out while repairing
                int blockFor = consistency.blockFor(keyspace);
                if (Tracing.isTracing())
                    Tracing.trace("Timed out while read-repairing after receiving all {} data and digest responses", blockFor);
                else
                    logger.debug("Timeout while read-repairing after receiving all {} data and digest responses", blockFor);

                throw new ReadTimeoutException(consistency, blockFor-1, blockFor, true);
            }
        }