Kina kake maido da kurakurai da sake ƙoƙari a RabbitMQ?

Question

Accepted Answer

Maido **kurakurai da sake ƙoƙari** yana da mahimmanci don ingantaccen masu karɓa RabbitMQ — yanke shawarar abin da za a yi lokacin da jigon sarrafa abin da ba ya yi nasara (sake ƙoƙari, zubar da wasiƙa, ko watsi). Maido na daidai yakan tilasta zuwa rashin hasara na abubuwa da masu karɓa da suka makale.

## Matsala

```text
When a consumer fails to process a message (bad data, downstream failure, bug):
  → requeue forever → a "poison" message blocks the queue (retried endlessly)
  → discard → message LOST
  → crash → reprocess, possibly stuck again
→ need a deliberate strategy.
```

## Dabarun sake ƙoƙari

```text
✓ NACK + REQUEUE → reject and requeue for retry (but limit retries — don't requeue forever)
✓ RETRY WITH BACKOFF → retry transient failures with increasing delays (e.g. via a delayed
  retry queue with TTL → requeue after a delay)
✓ RETRY LIMIT → track attempts; after N failures → DEAD LETTER (don't retry forever)
✓ Distinguish TRANSIENT (retry) vs PERMANENT (dead-letter immediately) failures
```

## Wasiƙodin da ba a tuna su ba da alamu

```text
✓ DEAD LETTER QUEUE → after retries fail → route to a DLQ (inspect/handle later) → consumer
  moves on (not stuck), message not lost
✓ DELAYED RETRY → a retry queue with message TTL → message expires → dead-lettered back to
  the work queue (retry after a delay) — a common retry-with-backoff pattern
✓ IDEMPOTENT processing → redelivery causes duplicates → handle them safely
✓ LOG/ALERT on errors and DLQ; monitor the DLQ
```

## Me ya sa hakan yawa

Sanin kina maido da kurakurai da sake ƙoƙari yana da daraja domin **maido na daidai yana da mahimmanci ga ingantaccen masu karɓa RabbitMQ**, saboda haka yana da mahimmanci ilimin aiki.

Lokacin da jigon sarrafa abin ba ya yi nasara, maido mara fahimta yana haifar da matsaloli: sake buƙatar da waje gida dabam-dabam sanaka jiya ciki akan titin tare da wasiƙar gida da ta samu ƙwance, watsi yana watsi wasiƙa, da kuguwa yana haifar da sake sarrafa — saboda haka dabarun da ba ta buƙatar ashirin ake buƙata.

Sanin **dabarun sake ƙoƙari** — nack da sake buƙata (tare da iyakokin sake ƙoƙari, ba dabam-dabam ba), **sake ƙoƙari tare da ƙarfafawa** (sake ƙoƙari kurakurai na jiya tare da ƙara jiya jiya, sau da yawa ta hanyar jigon sake ƙoƙari tare da TTL), **iyakokin sake ƙoƙari** (raka ƙoƙorin ƙiyi sanake zuwa suna buƙata zubar da abubuwa bayan N aiki da ta kammala), da bambance transient (sake ƙoƙari) da jiya da dade (zubar da darejeriya nan da nan) — shine ilimin mahimmanci na maido abubuwan aiki na karfi.

Sanin **wasiƙodin da ba a tuna su ba da alamu da alamu** — **jigon wasiƙar wasiƙar da ba a tuna su ba** (buƙata zuwa DLQ bayan sake ƙoƙari ba su yi nasara, saboda masu karɓa suka motsa da wasiƙa ba ta asaita), **daidaitaccen sake ƙoƙari alamu** (jigon sake ƙoƙari tare da wasiƙar TTL inda wasiƙodin suka dade su koda wasiƙodin suka ƙaita zuwa jigon aiki, aiwatar da sake ƙoƙari-tare-da-ƙarfafawa — daidaitaccen alamu RabbitMQ, kyakkyar), **sarrafawa mara ƙarya** (maido zuwa jigon sarrafa masu buƙatan karya da karya), da rubuce-rubuce/umarnin alarma/kula da DLQ — nuna maido da karfi.

Hada tare da sake ƙoƙari (tare da iyakokin da ƙarfafawa) da zubar da wasiƙodin yana da tsari na gida don maido wasiƙodin da suka kammala a RabbitMQ, tiyata gida wasiƙar da ba ta buƙatar da masu karɓa wacce suka makale.

Mailo na daidai yana da mahimmanci ga masu karɓa ingantaccen da ba su asaita wasiƙodin ko makale.

Domin maido da karfi (sake ƙoƙari tare da iyakokin da ƙarfafawa, zubar da wasiƙodin, rashin karfi) yana da mahimmanci ga ingantaccen masu karɓa RabbitMQ — tiyata makale masu karɓa da zubar da wasiƙodin — da hanyar sake ƙoƙari-tare-da-DLQ (hada da daidaitaccen sake ƙoƙari alamu) yana da tsari, da domin sanin dabarun nan yana da mahimmanci ilimin aiki, sanin kina maido da kurakurai da sake ƙoƙari a RabbitMQ yana da daraja, ilimin mahimmanci da karfi — mahimmanci ga ingantaccen masu karɓa, rubutu dabarun sake ƙoƙari (iyakokin, ƙarfafawa) da zubar da wasiƙodin don maido wasiƙodin da suka kammala da karfi, da mahimmanci don gina ingantaccen masu karɓa RabbitMQ da maido abubuwan aiki da suke ba su yi nasara.