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as stated in https://docs.celeryq.dev/en/v5.6.1/userguide/workers.html#remote-control: 'The solo pool supports remote control commands, but any task executing will block any waiting control command, so it is of limited use if the worker is very busy.' This prevents inspecting a worker when it is running a task, so better switch to another pool type.
/tasks/inspect.json dumps worker active queues as json
will inspect the worker queues for a running task with the same name and args, and return its task id directly instead of queuing a new identical task. this way if the user reloads a page triggering a task (such as /csw/srv or /admin/geoserver/datadir) we wont queue another task, and just wait for the completion of the already running task.
landryb
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Mar 19, 2026
this can happen if no celery worker is running, and in this case active_tasks.items() blows.
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When a user goes to a page that triggers a task (such as
/csw/srvwhen the geonetwork contents werent found in the cache, or/admin/geoserver/datadirwhen the datadir view wasnt found in memory), avoid queuing another task if there's already one running with the same name and args.