} catch (final Exception e) {
                logger.warn("Failed to upgrade data.", e);
                saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_14_12, e.getLocalizedMessage()));
            }
        } else {
            saveError(messages -> messages.addErrorsUnknownVersionForUpgrade(GLOBAL));
        }
        return redirect(getClass());
    }

        if (loginCredential == null) {
            if (logger.isDebugEnabled()) {
                logger.debug("No user in SSO request.");
            }
            if (ssoManager.available()) {
                saveError(messages -> messages.addErrorsSsoLoginError(GLOBAL));
            }
            return redirect(LoginAction.class);
        }
        if (loginCredential instanceof ActionResponseCredential) {

        }
        if (doc == null) {
            saveError(messages -> messages.addErrorsDocidNotFound(GLOBAL, form.docId));
            return redirect(ErrorAction.class);
        }
        final String url = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
        if (url == null) {
            saveError(messages -> messages.addErrorsDocumentNotFound(GLOBAL, form.docId));

        }
        if (doc == null) {
            saveError(messages -> messages.addErrorsDocidNotFound(GLOBAL, form.docId));
            return redirect(ErrorAction.class);
        }

        final String content = viewHelper.createCacheContent(doc, form.hq);
        if (content == null) {
            saveError(messages -> messages.addErrorsDocidNotFound(GLOBAL, form.docId));

                logger.debug(e.getMessage(), e);
            }
            saveError(e.getMessageCode());
            return redirectToRoot();
        } catch (final ResultOffsetExceededException e) {
            if (logger.isDebugEnabled()) {
                logger.debug(e.getMessage(), e);
            }
            saveError(messages -> {
                messages.addErrorsResultSizeExceeded(GLOBAL);
            });

        final FessMessages messages = createMessages();
        validationMessagesLambda.message(messages);
        sessionManager.info().saveMessages(messages);
    }

    protected void saveError(final VaMessenger<FessMessages> validationMessagesLambda) {
        final FessMessages messages = createMessages();
        validationMessagesLambda.message(messages);
        sessionManager.errors().saveMessages(messages);

            systemProperties.store();
        } catch (final Exception e) {
            logger.warn("Failed to send a test mail.", e);
            saveError(messages -> messages.addErrorsFailedToSendTestmail(GLOBAL));
        }

        return redirectByParam(AdminGeneralAction.class, "notificationTo", form.notificationTo);
    }

    @Execute

                    job.launchNow();
                });
            }
            saveInfo(messages -> messages.addSuccessStartCrawlProcess(GLOBAL));
        } else {
            saveError(messages -> messages.addErrorsFailedToStartCrawlProcess(GLOBAL));
        }
        return redirect(AdminWizardAction.class);
    }

            map.put("version", "");
            result.add(map);
            try {
                result.addAll(getAllAvailableArtifacts());
            } catch (final Exception e) {
                saveError(messages -> messages.addErrorsFailedToFindPlugins(GLOBAL));
                logger.warn("Failed to access a plugin repository.", e);
            }
            RenderDataUtil.register(data, "availableArtifactItems", result);

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