KITFORMA · EDITORIAL GUIDE
Why does Queue.join never return after a worker fails?
KitForma editorial guide. Queue completion counts depend on a matching `task_done()` for each successful `get()`. A worker that raises before acknowledging leaves unfinished work outstanding.
Step-by-step guidance
Queue completion counts depend on a matching
task_done() for each successful get(). A worker that raises before acknowledging leaves unfinished work outstanding.
Wrap processing in try/finally and call task_done exactly once for the retrieved item. Record failures separately so acknowledgement does not imply successful business processing. Test a worker exception, a stop marker and normal completion. Calling task_done before a get or twice is also incorrect. For durable jobs, an in-memory queue acknowledgement is insufficient: persist retry or failure state before considering the work safely handled.Sources and verification
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