String INDEX_REINDEX_REFRESH = "index.reindex.refresh";

    /** The key of the configuration. e.g. 1m */
    String INDEX_REINDEX_TIMEOUT = "index.reindex.timeout";

    /** The key of the configuration. e.g. 5m */
    String INDEX_REINDEX_SCROLL = "index.reindex.scroll";

    /** The key of the configuration. e.g.  */
    String INDEX_REINDEX_max_docs = "index.reindex.max_docs";

    /** The key of the message: Failed to start reindexing from {0} to {1} */
    public static final String ERRORS_failed_to_reindex = "{errors.failed_to_reindex}";

    /** The key of the message: Failed to read request file: {0} */
    public static final String ERRORS_failed_to_read_request_file = "{errors.failed_to_read_request_file}";

        Object k = e.getKey();
        Object v = e.getValue();
        int kHash = Hashing.smearedHash(k);
        int eIndex = findEntryByKey(k, kHash);
        if (eIndex != ABSENT && Objects.equal(v, values[eIndex])) {
          removeEntryKeyHashKnown(eIndex, kHash);
          return true;
        }
      }
      return false;
    }

    @Override
    Entry<K, V> forEntry(int entry) {

                    logger.warn("Failed to update aliases for {} and {}", fromIndex, toIndex);
                }
            }, e -> logger.warn("Failed to reindex from {} to {}", fromIndex, toIndex, e)));
            return true;
        }
        saveError(messages -> messages.addErrorsFailedToReindex(GLOBAL, fromIndex, toIndex));
        return false;
    }

                .collect(Collectors.joining(";"));
        if (logger.isDebugEnabled()) {
            logger.debug("reindex script: {}", code);
        }
        return "if(ctx._source." + langField + "!=null){" + code + "}";
    }

            final String oldIndex = "." + index;
            if (client.existsIndex(oldIndex) && client.existsIndex(index)) {
                logger.info("Copying from {} to {}", oldIndex, index);
                if (!client.reindex(oldIndex, index, false)) {
                    logger.warn("Failed to copy from {} to {}", oldIndex, index);
                }
            } else if (logger.isDebugEnabled()) {

    /** The key of the message: Data Migration */
    public static final String LABELS_upgrade_data_migration = "{labels.upgrade_data_migration}";

    /** The key of the message: Reindex */
    public static final String LABELS_upgrade_reindex = "{labels.upgrade_reindex}";

    /** The key of the message: Start */
    public static final String LABELS_upgrade_start_button = "{labels.upgrade_start_button}";

                .replace("__DEST_INDEX__", toIndex)//
                .replace("__SCRIPT_SOURCE__", ComponentUtil.getLanguageHelper().getReindexScriptSource());
        return reindex(fromIndex, toIndex, source, waitForCompletion);
    }

    public boolean reindex(final String fromIndex, final String toIndex, final boolean waitForCompletion) {
        final String template = """