OtterMind/Chat2DB · warning · DataNotFoundException

common.dataNotFound

common.dataNotFound

Error message

common.dataNotFound

What it means

DataNotFoundException ('common.dataNotFound') from TaskRecordServiceImpl.resolveDownload when the task lookup returns null or the task's downloadUrl is blank — there is nothing to download.

Source

Thrown at chat2db-community-server/chat2db-community-domain/chat2db-community-domain-core/src/main/java/ai/chat2db/community/domain/core/impl/task/TaskRecordServiceImpl.java:72

        if (!taskSchedulerService.cancel(id)) {
            Task task = getTask(id);
            if (task == null || StringUtils.equalsAnyIgnoreCase(
                    task.getTaskStatus(), "FINISHED", STATUS_STOP, "ERROR")) {
                return;
            }
        }
        TaskRecordUpdateRequest request = new TaskRecordUpdateRequest();
        request.setId(id);
        request.setTaskStatus(STATUS_STOP);
        request.setDownloadUrl("");
        updateTask(request);
    }

    @Override
    public TaskDownload resolveDownload(Long id, Long userId) {
        Task task = getTask(id);
        if (task == null || StringUtils.isBlank(task.getDownloadUrl())) {
            throw new DataNotFoundException();
        }
        if (!Objects.equals(userId, task.getUserId())) {
            throw new PermissionDeniedBusinessException();
        }

        File file = new File(task.getDownloadUrl());
        if (!file.exists() || !file.canRead()) {
            throw new DataNotFoundException();
        }
        return TaskDownload.builder()
                .fileName(file.getName())
                .fileUri(file.toURI().toString())
                .build();
    }
}

View on GitHub (pinned to 5ee1e990e7)

Solutions

1. Confirm the task id exists and that the export has reached a completed status before resolving the download.
2. If the task was stopped, re-trigger the export to regenerate downloadUrl.
3. Validate id is non-null and present in task list before calling resolveDownload.

Task t = getTask(id);
if (t == null || StringUtils.isBlank(t.getDownloadUrl())) throw new DataNotFoundException();

boolean isDownloadReady(Task t) { return t != null && StringUtils.isNotBlank(t.getDownloadUrl()); }

When it happens

Trigger: GET/resolve a task download by an id whose task does not exist, was never assigned a downloadUrl (export not finished / failed), or whose URL field was cleared (e.g. after STATUS_STOP reset).

Common situations: Polling a download URL before the export task has finished; task id mistyped; task cancelled (stopTask blanks the URL); export failed without producing a file.

Related errors

• common.permissionDenied
• ai.model.config.notFound
• datasource_not_found
• largeCellValue.downloadFailed
• datasource.not.found

AI-assisted analysis of OtterMind/Chat2DB@5ee1e990e7 (2026-08-14). Data as JSON: /api/errors/f33d487f5495524b. Report an issue: GitHub.