Redis: Stream Error Message Fix
A bug fix was merged to resolve duplicate error prefixes in Redis stream XNACK command responses. The change affects error handling for stream consumer group acknowledgment operations.
Duration: PT1M16S
Episode overview
This episode is a short developer briefing from Redis.
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- Show: Redis
- Published: 2026-04-22T00:00:00Z
- Audio duration: PT1M16S
Transcript excerpt
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Good morning, this is your Redis development briefing for Tuesday, April 22nd, 2026.
Developer sggeorgiev merged a fix for duplicate error prefixes in XNACK error replies. The issue caused clients to receive "ERR ERR" instead of the intended single "ERR" prefix when XNACK commands encountered errors. This happened because the xnackCommand function was manually adding "ERR" prefixes to error messages…
The fix removes redundant prefixes from five affected error calls in the stream handling code and updates the corresponding test patterns to catch future regressions. The changes span the main stream implementation file and the consumer group test suite, with 30 lines modified across both files.
This correction ensures proper error message formatting for applications using Redis streams and consumer groups, particularly those parsing error responses programmatically.
What's next: Watch for any follow-up reports from users testing stream error handling, and monitor for similar prefix issues in other Redis commands.
That's your Redis update for today. Back tomorrow with more development activity.
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