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fix(mcp): harden notification system against race conditions #3168

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Merged
waleedlatif1 merged 8 commits into from
Feb 10, 2026
Merged

fix(mcp): harden notification system against race conditions #3168

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cf25fb0
fix(mcp): harden notification system against race conditions
waleedlatif1 Feb 8, 2026
7c6927d
updated tests
waleedlatif1 Feb 9, 2026
f844e25
plugged in new mcp event based system and create sse route to publish…
waleedlatif1 Feb 9, 2026
ec69103
ack commetns
waleedlatif1 Feb 9, 2026
3de6e3b
fix reconnect timer
waleedlatif1 Feb 9, 2026
4d53e35
cleanup when running onClose
waleedlatif1 Feb 9, 2026
0ba38ce
fixed spacing on mcp settings tab
waleedlatif1 Feb 9, 2026
44ebc51
keep error listeners before quiet in redis
waleedlatif1 Feb 10, 2026
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fix reconnect timer
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@waleedlatif1
waleedlatif1 committed Feb 9, 2026
commit 3de6e3b40c4e99aa7f12aeeac4eecd6822e87f69
10 changes: 10 additions & 0 deletions apps/sim/lib/mcp/connection-manager.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -125,6 +125,8 @@ class McpConnectionManager {
return { supportsListChanged: false }
}

this.clearReconnectTimer(serverId)

this.connections.set(serverId, client)
this.states.set(serverId, {
serverId,
Expand Down Expand Up @@ -305,6 +307,14 @@ class McpConnectionManager {

if (this.disposed) return

const currentState = this.states.get(serverId)
if (currentState?.connected) {
logger.info(
`[${config.name}] Connection already re-established externally, skipping reconnect`
)
return
}

const attempts = state.reconnectAttempts
this.connections.delete(serverId)
this.states.delete(serverId)
Expand Down