if (entry != null) {
            entry.updateState(grantedState);
            log.debug("Updated lease {} to state: 0x{}", key, Integer.toHexString(grantedState));
        } else {
            log.warn("Attempted to update non-existent lease: {}", key);
        }
    }

    /**
     * Get lease entry by key
     *
     * @param key lease key
     * @return lease entry or null if not found
     */

        
        for (int i = currentChannels; i < targetChannels; i++) {
            try {
                establishChannel(i);
            } catch (Exception e) {
                log.warn("Failed to establish channel {}", i, e);
            }
        }
    }
    
    private void establishChannel(int index) throws IOException {
        // Select interfaces for this channel

{* ../../docs_src/header_params/tutorial003_an_py310.py hl[9] *}

Wenn Sie mit dieser *Pfadoperation* kommunizieren und zwei HTTP-Header senden, wie:

```
X-Token: foo
X-Token: bar
```

Dann wäre die <abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Response</abbr>:

```JSON
{
    "X-Token values": [
        "bar",
        "foo"
    ]
}
```

     */
    @PreDestroy
    public void destroy() {
        shutdownHookList.forEach(action -> {
            try {
                action.run();
            } catch (final Exception e) {
                logger.warn("Failed to process shutdown task.", e);
            }
        });
    }

    /**
     * Gets the username of the current user.
     *
     * @return The username, or "guest" if not logged in.
     */

                String[] inputs;
                String output;

                final Matcher m = parsePattern.matcher(replacedLine);

                if (!m.find()) {
                    logger.warn("Failed to parse mapping: line={}, path={}", line, path);
                    if (updater != null) {
                        updater.write("# " + line);
                    }
                    continue;

        try {
            doc = searchHelper.getDocumentByDocId(form.docId, queryFieldConfig.getCacheResponseFields(), getUserBean()).orElse(null);
        } catch (final Exception e) {
            logger.warn("Failed to request: {}", form.docId, e);
        }
        if (doc == null) {
            saveError(messages -> messages.addErrorsDocidNotFound(GLOBAL, form.docId));
            return redirect(ErrorAction.class);
        }

        }

        final TimeoutTask timeoutTask = createTimeoutTask();
        try {
            executeThumbnailGenerator();
        } catch (final Exception e) {
            logger.warn("Failed to generate thumbnails.", e);
            resultBuf.append(e.getMessage()).append("\n");
        } finally {
            if (timeoutTask != null && !timeoutTask.isCanceled()) {
                timeoutTask.cancel();

        if (context == null) {
            if (enforceIntegrity) {
                throw new CIFSException("No preauth integrity context found for session: " + sessionId);
            }
            log.warn("No preauth integrity context for session {}, skipping update", sessionId);
            return;
        }

        if (!context.isValid()) {

                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to interpolate missing file location for profile activator: " + fileString, e);
                } else {
                    logger.warn("Failed to interpolate missing file location for profile activator: " + fileString
                            + ", enable verbose output (-X) for more details");
                }
            }
        }

                }
                try {
                    jobHelper.register(scheduledJob);
                } catch (final Exception e) {
                    logger.warn("Failed to update schedule: job={}", scheduledJob, e);
                }
            });
            schedulerTime = now;
        }, fessConfig.getSchedulerMonitorIntervalAsInteger(), true);
    }

    @Override