fix: cleanup pending acks on timeout to prevent memory leak#5442
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seungeonchoi wants to merge 1 commit intosocketio:mainfrom
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fix: cleanup pending acks on timeout to prevent memory leak#5442seungeonchoi wants to merge 1 commit intosocketio:mainfrom
seungeonchoi wants to merge 1 commit intosocketio:mainfrom
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When using `emitWithAck` with a timeout, if clients don't respond and the timeout triggers, the ack callbacks remain in `socket.acks` Map indefinitely, causing a memory leak. This fix: - Returns a cleanup function from `broadcastWithAck` that removes pending acks from all sockets that received the packet - Calls the cleanup function when timeout occurs in broadcast-operator - Adds test cases to verify acks are cleaned up after timeout Fixes socketio#4984
darrachequesne
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Mar 2, 2026
When using `emitWithAck` with a timeout, if clients didn't respond and the timeout triggers, the ack callbacks remained in `socket.acks` Map indefinitely, causing a memory leak. Related: #4984
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Merged as da04267. Thanks a lot 👍 |
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The kind of change this PR does introduce
Current behavior
When using
emitWithAckwith a timeout, if clients don't respond and the timeout triggers, the ack callbacks remain insocket.acksMap indefinitely, causing a memory leak.New behavior
The ack callbacks are cleaned up from
socket.acksMap when the timeout occurs, preventing memory leak.Other information (e.g. related issues)
Fixes #4984