SocketIO: Change isAlive to atomic update to solve the high concurrency problem #1165
Conversation
liaohongxing
requested review from
gaby,
sixcolors,
ReneWerner87 and
efectn
and removed request for
a team
WalkthroughThe changes involve modifying the Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant Websocket
participant Mutex
Client->>Websocket: Call disconnected(err)
Websocket->>Mutex: Lock
Mutex-->>Websocket: Lock acquired
Websocket->>Websocket: Set alive status to false
Websocket->>Websocket: Check if connection is alive
alt Not alive
Websocket->>Websocket: Close done channel
Websocket->>Websocket: Fire disconnect event
end
Websocket->>Mutex: Unlock
Mutex-->>Websocket: Lock released
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Actionable comments posted: 1
Review details
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Review profile: CHILL
Files selected for processing (1)
- socketio/socketio.go (1 hunks)
Additional comments not posted (2)
socketio/socketio.go (2)
569-569: Ensure atomicity of theisAliveupdate.The
isAlivestatus is set to false before checking it again. This ensures that the state is updated atomically and prevents race conditions.The code changes are approved.
573-573: LGTM!The disconnect event is fired correctly after ensuring the connection is inactive.
The code changes are approved.
socketio/socketio.go
Outdated
| if !kws.IsAlive() { | ||
| close(kws.done) | ||
| } |
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Improve readability and efficiency.
The check if !kws.IsAlive() is redundant after setting kws.setAlive(false). The close(kws.done) should be moved outside the if block for clarity.
Apply this diff to improve readability and efficiency:
- if !kws.IsAlive() {
- close(kws.done)
- }
+ close(kws.done)Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| if !kws.IsAlive() { | |
| close(kws.done) | |
| } | |
| close(kws.done) |
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setAlive then needs to check the status again, and isAlive may enter in parallel
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@liaohongxing, you're absolutely right. Rechecking the status after calling setAlive(false) is crucial to avoid race conditions, especially in a highly concurrent environment where isAlive might be accessed by other goroutines in parallel. The current implementation ensures that the done channel is only closed when the connection is confirmed to be inactive, which is the correct approach. Thanks for the clarification!
|
Can you merge this patch? I have tested this patch in the production environment, and there is no problem |
SocketIO: Change isAlive to atomic update to solve the high concurrency problem, It is found that in the disconnected method, the channel is closed repeatedly, which may be caused by concurrent execution of multiple coroutines
@ReneWerner87 @antoniodipinto
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Summary by CodeRabbit