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Meteor 3.5-rc.1: Change Streams did not appear to activate until MONGO_OPLOG_URL was removed

Status: Open.

#14454 In meteor/meteor;

· filipenevola opened on Jun 11, 2026

Meteor 3.5-rc.1 Change Streams caused production method/pub latency regression; pinning to oplog/polling restored normal performance

Status: Open.

#14453 In meteor/meteor;

· filipenevola opened on Jun 11, 2026

Meteor 3.5-rc.1 change-stream observer can leave DDP write fence waiting after observer stops

Status: Open.

#14452 In meteor/meteor;

· hexsprite opened on Jun 10, 2026

Clarify the status of RawWebSocketConnection while no shipped transport uses it

Status: Open.

#14449 In meteor/meteor;

· dupontbertrand opened on Jun 9, 2026

Meteor 3.4.1 building with rspack in Docker hangs

confirmedWe want to fix or implement itWe want to fix or implement it

modern-build-stack

Status: Open.

#14445 In meteor/meteor;

· evolross opened on Jun 7, 2026

Meteor 3.4 dev: build tool leaks rspack server bundle + source-map SourceNodes on every rebuild → OOM

modern-build-stack

Status: Open.

#14443 In meteor/meteor;

· a4xrbj1 opened on Jun 4, 2026

Server startup crash: transitive uuid dependency from @langchain/langgraph-checkpoint is not resolvable in generated server bundle

Status: Open.

#14439 In meteor/meteor;

· mchampton opened on Jun 2, 2026

[Security vulnerability] Update sockjs and rspack to fix uuid dependency

Status: Open.

#14435 In meteor/meteor;

· evolross opened on May 28, 2026

[Security vulnerability] Upgrade qs dependency to 6.15.2 in meteor-node-stubs

Status: Open.

#14428 In meteor/meteor;

· AGVGerardo opened on May 23, 2026

Symbol.iterator polyfill in ecmascript-runtime-client breaks native iterator protocol on the client

Status: Open.

#14420 In meteor/meteor;

· drone1 opened on May 18, 2026

@meteorjs/rspack: auto-install of missing peer deps wipes the package's own rspack.config.js mid-build

modern-build-stack

Next 3.x.xThis label holds issues and PRs that almost made it into a release that have higher priority.This label holds issues and PRs that almost made it into a release that have higher priority.

Status: Open.

#14416 In meteor/meteor;

· selaias opened on May 14, 2026

Package-level npm-shrinkwrap.json silently fails to pin transitive deps — Meteor packages cannot have reproducible npm installs

Status: Open.

#14415 In meteor/meteor;

· perbergland opened on May 13, 2026