[vladislav805]

After navigation, concurrent DOM snapshot collectors can each detect missing rrweb and upload the entire library to the same browser session.

Share one in-flight upload per session while keeping event collection independent for each caller. Already-installed rrweb collections remain concurrent.

Invalidate pending collectors when cleanup starts. Discard late events to prevent mixing snapshots between retries, and preserve newer installation state when older operations finish.

Repeated navigation is handled with a bounded retry loop. Add debug logs for uploads, waits and discarded events.

{"pid":59141,"timeMs":15935.628006,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:8","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":14502.471859,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":false,"rrwebCodeBytes":0,"event":"result","matchedByBodyIdentity":true,"error":false,"isRrwebInstalled":false,"isRrwebSupported":null,"rrwebEventCount":0,"elapsedSinceCommandMs":1433.1541969999998,"pendingTotal":9,"pendingRrweb":8}
{"pid":59141,"timeMs":15936.674345,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:18","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":15936.622415,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":8,"pendingRrweb":7,"pendingRequestIds":["59141:9","59141:10","59141:11","59141:12","59141:14","59141:15","59141:16","59141:17"]}
...
{"pid":59141,"timeMs":15969.511889,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:19","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":15969.456635,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":8,"pendingRrweb":7,"pendingRequestIds":["59141:9","59141:11","59141:12","59141:14","59141:15","59141:16","59141:17","59141:18"]}
...
{"pid":59141,"timeMs":15974.884561,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:20","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":15974.832516,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":8,"pendingRrweb":7,"pendingRequestIds":["59141:9","59141:12","59141:14","59141:15","59141:16","59141:17","59141:18","59141:19"]}
...
{"pid":59141,"timeMs":15990.724561,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:21","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":15990.673399,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":8,"pendingRrweb":7,"pendingRequestIds":["59141:9","59141:12","59141:15","59141:16","59141:17","59141:18","59141:19","59141:20"]}
...
{"pid":59141,"timeMs":15996.223394,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:22","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":15996.150454,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":8,"pendingRrweb":7,"pendingRequestIds":["59141:9","59141:15","59141:16","59141:17","59141:18","59141:19","59141:20","59141:21"]}
...
{"pid":59141,"timeMs":16004.584468,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:23","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":16004.532853,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":8,"pendingRrweb":7,"pendingRequestIds":["59141:15","59141:16","59141:17","59141:18","59141:19","59141:20","59141:21","59141:22"]}
...
{"pid":59141,"timeMs":16011.505688,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:24","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":16011.459448,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":8,"pendingRrweb":7,"pendingRequestIds":["59141:16","59141:17","59141:18","59141:19","59141:20","59141:21","59141:22","59141:23"]}
...
{"pid":59141,"timeMs":16027.025136,"browserId":"searchapp-emulator","transport":"custom","requestId":"59141:27","command":"executeScript","method":"POST","endpointKind":"execute/sync","startedMs":16026.976661,"scriptHash":"51176f21e8c6b6f4032bf8170d086ab5fb23ca0cfd205087751d25174b0b2f8f","payloadBytes":4936,"scriptFamily":"rrweb","rrwebCodeProvided":true,"rrwebCodeBytes":182637,"event":"command","pendingTotal":9,"pendingRrweb":8,"pendingRequestIds":["59141:18","59141:19","59141:20","59141:21","59141:22","59141:23","59141:24","59141:25","59141:26"]}
...
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[sipayRT]

One remaining deduplication edge case involving delayed probe responses:

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/gemini-testing/testplane@1347

commit: 2580464

[vladislav805]

@sipayRT, fixed in 4b68b12. We now track completed uploads as well as in-flight ones. If a missing response predates a completed upload, the caller probes again without sending the library. If that fresh probe still reports missing, a new upload is allowed.

Added regression tests for delayed responses, navigation, unsupported installation, and cleanup.