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[ISSUE #3540]⚡️Shutdown safety and state management improvements for HA services#3541

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rocketmq-rust-bot merged 1 commit intomainfrom
enh-3540
Jun 26, 2025
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[ISSUE #3540]⚡️Shutdown safety and state management improvements for HA services#3541
rocketmq-rust-bot merged 1 commit intomainfrom
enh-3540

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@mxsm mxsm commented Jun 26, 2025

Which Issue(s) This PR Fixes(Closes)

Fixes #3540

Brief Description

How Did You Test This Change?

Summary by CodeRabbit

  • Bug Fixes
    • Improved the shutdown process for certain services to ensure their connection state is properly updated before termination.

Copilot AI review requested due to automatic review settings June 26, 2025 15:49
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coderabbitai bot commented Jun 26, 2025

Walkthrough

The shutdown methods of ReadSocketService and WriteSocketService in rocketmq-store/src/ha/default_ha_connection.rs were updated to explicitly acquire a write lock and set their internal state to HAConnectionState::Shutdown before aborting and awaiting their service tasks. No other logic or flow was changed.

Changes

File(s) Change Summary
rocketmq-store/src/ha/default_ha_connection.rs Modified shutdown methods of ReadSocketService and WriteSocketService to set state to Shutdown before aborting service tasks.

Sequence Diagram(s)

sequenceDiagram
    participant Caller
    participant Service (ReadSocketService/WriteSocketService)
    participant State (current_state)
    participant Task (service_handle)

    Caller->>Service: shutdown()
    Service->>State: acquire write lock
    Service->>State: set to HAConnectionState::Shutdown
    Service->>Task: abort()
    Service->>Task: await termination
    Note right of Service: Service shutdown complete
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Assessment against linked issues

Objective Addressed Explanation
Explicit state coordination and service-level state management in shutdown methods (#3540)
Race condition prevention via locking and graceful service termination patterns (#3540)
Consistent state model and explicit state transitions for service shutdown (#3540)
Defensive programming for connection count bounds checking and underflow protection (#3540) No changes related to connection count bounds checking or underflow protection are present.

Assessment against linked issues: Out-of-scope changes

Code Change Explanation
None All observed changes are within the scope of the stated objectives in the linked issue.

Poem

A rabbit hops in code so neat,
Ensuring shutdowns are complete.
With locks in paw, it sets the state,
So services can hibernate.
No race to run, no state askew—
A graceful end, as rabbits do! 🐇


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Reviewing files that changed from the base of the PR and between 69b0531 and b0fabb9.

📒 Files selected for processing (1)
  • rocketmq-store/src/ha/default_ha_connection.rs (2 hunks)
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🔇 Additional comments (2)
rocketmq-store/src/ha/default_ha_connection.rs (2)

401-404: LGTM! Excellent improvement to shutdown safety.

This change ensures the internal state is properly set to Shutdown before aborting the service task, preventing potential race conditions during shutdown. The explicit state management helps coordinate clean shutdown with the service's run loop that checks this state.


633-636: LGTM! Consistent shutdown pattern implementation.

This mirrors the same improvement made to ReadSocketService::shutdown(), ensuring both services follow identical shutdown safety patterns. The write lock acquisition and explicit state setting before task abortion provides proper shutdown coordination.

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Pull Request Overview

This PR enhances shutdown safety by explicitly marking HA connection state as Shutdown before aborting service tasks.

  • Introduces a write lock to current_state and sets it to HAConnectionState::Shutdown in both ReadSocketService::shutdown and WriteSocketService::shutdown.
  • Retains the abort-and-await sequence on the service_handle to ensure clean task termination.
Comments suppressed due to low confidence (1)

rocketmq-store/src/ha/default_ha_connection.rs:634

  • There should be unit or integration tests verifying that shutdown() correctly transitions current_state to HAConnectionState::Shutdown and that the service handle is properly aborted and awaited.
            let mut state = self.current_state.write().await;


pub async fn shutdown(&mut self) {
{
let mut state = self.current_state.write().await;
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[nitpick] The shutdown implementation is duplicated in both ReadSocketService and WriteSocketService. Consider extracting the common shutdown logic into a helper method or trait to reduce code duplication and improve maintainability.

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codecov bot commented Jun 26, 2025

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 26.17%. Comparing base (69b0531) to head (b0fabb9).
Report is 1 commits behind head on main.

Files with missing lines Patch % Lines
rocketmq-store/src/ha/default_ha_connection.rs 0.00% 4 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main    #3541      +/-   ##
==========================================
- Coverage   26.17%   26.17%   -0.01%     
==========================================
  Files         556      556              
  Lines       78685    78689       +4     
==========================================
  Hits        20593    20593              
- Misses      58092    58096       +4     

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LGTM

@rocketmq-rust-bot rocketmq-rust-bot merged commit 818bcc4 into main Jun 26, 2025
21 of 22 checks passed
@rocketmq-rust-bot rocketmq-rust-bot added approved PR has approved and removed ready to review waiting-review waiting review this PR labels Jun 26, 2025
@mxsm mxsm deleted the enh-3540 branch July 3, 2025 13:36
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[Enhancement⚡️] Shutdown safety and state management improvements for HA services

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