if (!thumbnailManager.offer(doc)) {
                        if (logger.isDebugEnabled()) {
                            logger.debug("Removing {}={} from doc[{}]", thumbnailField, doc.get(thumbnailField),
                                    doc.get(fessConfig.getIndexFieldUrl()));
                        }
                        doc.remove(thumbnailField);
                    }
                });
            }

    public FessCrawlerConfig() {
        super();
    }

    /**
     * Gets the name of the queue index for the crawler.
     *
     * @return the queue index name
     */
    @Override
    public String getQueueIndex() {
        return ComponentUtil.getFessConfig().getIndexDocumentCrawlerIndex() + ".queue";
    }

    /**
     * Gets the name of the data index for the crawler.
     *
     * @return the data index name

```

### Retrieving Container ID

To use Docker commands on a specific container, you need to know the `Container ID` for that container. To get the `Container ID`, run

```sh
docker ps -a
```

`-a` flag makes sure you get all the containers (Created, Running, Exited). Then identify the `Container ID` from the output.

### Starting and Stopping Containers

                logError("Error updating file", e);
            }
        }

        return true;
    }

    /**
     * Gets the fully qualified class name for a type element, including handling inner classes.
     *
     * @param typeElement the type element to get the class name for
     * @return the fully qualified class name
     */
    private String getFullClassName(TypeElement typeElement) {

    /**
     * Gets the group id of the constituent's artifact.
     *
     * @return The group id, never {@code null}.
     */
    String getGroupId();

    /**
     * Gets the artifact id of the constituent's artifact.
     *
     * @return The artifact id, never {@code null}.
     */
    String getArtifactId();

    /**
     * Gets the type of the constituent's artifact.
     *

            }
        }

        /*
         * MNG-4312: We neither have reserved all of the above magic expressions nor is their set fixed/well-known (it
         * gets occasionally extended by newer Maven versions). This imposes the risk for existing plugins to
         * unintentionally use such a magic expression for an ordinary property. So here we check whether we

                buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                log(buf);
            }
        });
    }

    /**
     * Gets the current system time in milliseconds.
     *
     * @return current time in milliseconds
     */
    protected long getCurrentTimeMillis() {
        return ComponentUtil.getSystemHelper().getCurrentTimeAsLong();

     */
    String getSource();

    /**
     * Gets the one-based index of the line containing the problem. The line number should refer to some text file that
     * is given by {@link #getSource()}.
     *
     * @return The one-based index of the line containing the problem or a non-positive value if unknown.
     */
    int getLineNumber();

    /**

    //                                                                        Assist Logic
    //                                                                        ============
    /**
     * Gets a group entity based on the form.
     *
     * @param form the create form
     * @return optional group entity
     */
    private static OptionalEntity<Group> getEntity(final CreateForm form) {

                    }
                });
            } catch (final Exception e) {
                logger.warn("Failed to access log files.", e);
            }
        }
    }

    /**
     * Gets host information including hostname and IP address.
     *
     * @return formatted string containing hostname and IP address
     */
    protected String getHostInfo() {