alibaba/Sentinel

[BUG] 资源名称使用正则表达式时，当使用非快速失败的CONTROL_BEHAVIOR时，配置的流控规则不会加载

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#3544 opened on Aug 18, 2025

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 (1 comment) (0 reactions) (0 assignees)Java (23,109 stars) (8,150 forks)batch import
good first issue

Description

Issue Description

Type: bug report

Describe what happened

请问下流控规则，资源名称要使用正则表达式时，流控效果CONTROL_BEHAVIOR_DEFAULT要限制是快速失败才允许使用regex，当我使用其他CONTROL_BEHAVIOR时，配置的流控规则不会加载 com/alibaba/csp/sentinel/slots/block/flow/FlowRuleUtil.java:249 if (rule.isRegex()) { return !rule.isClusterMode() && rule.getControlBehavior() == RuleConstant.CONTROL_BEHAVIOR_DEFAULT; }

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Contributor guide

Tech stack
java
Domain
backend
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.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Java basicsSentinel flow control concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Investigate the validation logic in FlowRuleUtil.java around line 249. The method currently rejects regex rules when the control behavior is not the default. Confirm if the restriction is intentional or a bug. Check if there are existing tests for regex flow rules to understand expected behavior. Look at the repository's contributing guidelines and any related issues or PRs.