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It turns out that just rehydrating and not also re-running the on_load handlers can leave applications in a bad state; particularly when their background tasks exiting are predicated on the `sid`, that will change on reconnect, but without an on_load, no mechanism is there to restart the tasks.
CodSpeed Performance ReportMerging #5980 will not alter performanceComparing Summary
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Greptile OverviewGreptile SummaryThis PR reverts the reconnect optimization introduced in PR #5969 to fix issues with background tasks becoming stale after reconnection. Previously, reconnects only sent a hydrate event without running Key Changes:
Confidence Score: 5/5
Important Files ChangedFile Analysis
Sequence DiagramsequenceDiagram
participant Client as Frontend (state.js)
participant Socket as WebSocket
participant Server as Backend
participant Middleware as HydrateMiddleware
Note over Client,Server: Initial Connection
Client->>Socket: connect()
Socket->>Server: WebSocket connection established
Server->>Client: "connect" event
Client->>Client: queue initialEvents()
Client->>Server: hydrate event
Server->>Middleware: preprocess(hydrate)
Middleware->>Middleware: reset client storage
Middleware->>Middleware: set is_hydrated = false
Middleware->>Server: return state delta
Server->>Client: state update + on_load events
Note over Client,Server: Reconnection (After this PR)
Client->>Client: socket.rehydrate = true
Socket--xServer: Disconnected
Client->>Socket: reconnect()
Socket->>Server: WebSocket reconnected
Server->>Client: "connect" event
Client->>Client: Check rehydrate flag = true
Client->>Client: queue ALL initialEvents() (hydrate + on_load)
Client->>Server: hydrate event
Server->>Middleware: preprocess(hydrate)
Middleware->>Middleware: reset client storage
Middleware->>Middleware: set is_hydrated = false
Middleware->>Server: return state delta
Server->>Client: state update + on_load events
Note over Client,Server: Background tasks restart with new sid
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adhami3310
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Nov 17, 2025
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It turns out that just rehydrating and not also re-running the on_load handlers can leave applications in a bad state; particularly when their background tasks exiting are predicated on the
sid, that will change on reconnect, but without an on_load, no mechanism is there to restart the tasks.