<label for="autoExpandReplicasForDoc"
                                           class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.auto_expand_replicas_for_doc"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="autoExpandReplicasForDoc"/>

        assertNull(form.replaceAliases);
        assertNull(form.resetDictionaries);
        // numberOfShardsForDoc and autoExpandReplicasForDoc have defaults from FessConfig
        assertNotNull(form.numberOfShardsForDoc);
        assertNotNull(form.autoExpandReplicasForDoc);
        assertNull(form.loadBulkData);
        // rebuildConfigIndex defaults to Constants.ON
        assertEquals("on", form.rebuildConfigIndex);

    public String numberOfShardsForDoc = ComponentUtil.getFessConfig().getIndexNumberOfShards();

    /**
     * The auto expand replicas for doc.
     */
    @Size(max = 10)
    public String autoExpandReplicasForDoc = ComponentUtil.getFessConfig().getIndexAutoExpandReplicas();

    /**
     * The flag to load bulk data during config index rebuild.
     */
    @Size(max = 10)
    public String loadBulkData;

    /**

        verifyToken(this::asIndexHtml);
        if (startReindex(isCheckboxEnabled(form.replaceAliases), isCheckboxEnabled(form.resetDictionaries), form.numberOfShardsForDoc,
                form.autoExpandReplicasForDoc)) {
            saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
        }
        return redirect(getClass());
    }

    /**