taosdata/TDengine

It is not clear how many times each consumer poll operation needs to be performed

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#24,857 opened on Feb 23, 2024

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Description

subscription_problem 注释部分代码是原来直接判断如果poll返回数据是空，直接跳出循环。 发现总是得不到订阅数据。 改成200次poll，结果发现times在114的时候，获取到结果。当然，大部分时候是第一次就能获取到结果。 这个太难理解，如果200次完了都没有poll到呢。 有没有更好的方法呢。

Contributor guide

Research direction
Investigate the consumer poll logic in TDengine to understand why poll may return empty results intermittently. Verify if there is a race condition or timing issue, and test with proper handling of empty polls (e.g., retry with backoff).
Tech stack
c
Domain
backenddatabase
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Needs investigation
Prerequisites
CTDengine
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60