searchEngineClient.addMapping(docIndex, "doc", toIndex);
                if (searchEngineClient.copyDocIndex(fromIndex, toIndex, replaceAliases) && replaceAliases
                        && !searchEngineClient.updateAlias(toIndex)) {
                    logger.warn("Failed to update aliases for {} and {}", fromIndex, toIndex);

     * @param waitForCompletion whether to wait for the operation to complete
     * @return true if the copy operation was successful, false otherwise
     */
    public boolean copyDocIndex(final String fromIndex, final String toIndex, final boolean waitForCompletion) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String source = fessConfig.getIndexReindexBody()//