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1.4.0 memory leak. Bun occupies more than 3g memory at most. #21430

Closed as not planned
Closed as not planned
1.4.0 memory leak. Bun occupies more than 3g memory at most.#21430
Assignees
iamdavidhill

Description

@nUser0
nUser0
opened on Apr 8, 2026

Description

opencode-cli.exe web --hostname 192.168.1.25 --port 4095

After running for a period of time, cmd displays the following error message:

MaxListenersExceededWarning: Possible EventTarget memory leak detected. 11 event listeners added to [EventEmitter]. MaxListeners is undefined. Use events.setMaxListeners() to increase limit
emitter: EventEmitter {
_events: [Object ...],
_eventsCount: 1,
_maxListeners: undefined,
[Symbol(kCapture)]: false,
setMaxListeners: [Function: setMaxListeners],
getMaxListeners: [Function: getMaxListeners],
emit: [Function: emit],
addListener: [Function: addListener],
on: [Function: addListener],
prependListener: [Function: prependListener],
once: [Function: once],
prependOnceListener: [Function: prependOnceListener],
removeListener: [Function: removeListener],
off: [Function: removeListener],
removeAllListeners: [Function: removeAllListeners],
listeners: [Function: listeners],
rawListeners: [Function: rawListeners],
listenerCount: [Function: listenerCount],
eventNames: [Function: eventNames],
},
type: "event",
count: 11,

  at overflowWarning (node:events:185:19)
  at addListener (node:events:158:22)
  at <anonymous> (B:/~BUN/root/src/index.js:400384:19)
  at <anonymous> (B:/~BUN/root/src/index.js:400308:29)
  at <anonymous> (B:/~BUN/root/src/index.js:397188:13)
  at streamSSE (B:/~BUN/root/src/index.js:397217:7)
  at streamEvents (B:/~BUN/root/src/index.js:400282:19)
  at <anonymous> (B:/~BUN/root/src/index.js:400380:24)
  at dispatch (B:/~BUN/root/src/index.js:392956:30)
  at <anonymous> (B:/~BUN/root/src/index.js:392874:16)
  at dispatch (B:/~BUN/root/src/index.js:392956:30)
  at dispatch (B:/~BUN/root/src/index.js:392956:30)
  at cors2 (B:/~BUN/root/src/index.js:394447:16)
  at async dispatch (B:/~BUN/root/src/index.js:392956:30)
  at async <anonymous> (B:/~BUN/root/src/index.js:404053:20)
  at async dispatch (B:/~BUN/root/src/index.js:392956:30)
  at async basicAuth22 (B:/~BUN/root/src/index.js:394521:24)
  at async dispatch (B:/~BUN/root/src/index.js:392956:30)
  at async <anonymous> (B:/~BUN/root/src/index.js:393581:40)

Plugins

none

OpenCode version

1.4.0

Steps to reproduce

opencode-cli.exe web --hostname 192.168.1.25 --port 4095
After a period of normal use.
cmd displays the error message.

Screenshot and/or share link

No response

Operating System

win11

Terminal

cmd

Activity

  1. nUser0
    added
    bugSomething isn't working
    on Apr 8, 2026
  2. github-actions
    assigned
    iamdavidhill
    on Apr 8, 2026
  3. github-actions
    added
    perfIndicates a performance issue or need for optimization
    webRelates to opencode on web / desktop
    windows
    on Apr 8, 2026

  4. github-actions commented on Apr 8, 2026

    @github-actions
    github-actionsBot
    on Apr 8, 2026 – with GitHub Actions
    Contributor

    This issue might be a duplicate of existing issues. Please check:

    • Memory Megathread #20695: Memory Megathread — the maintainers are actively tracking memory issues here and have instructions on how to collect heap snapshots to help diagnose the problem. Please consider contributing your findings there.

  5. jeremyakers commented on Apr 13, 2026

    @jeremyakers
    jeremyakers
    on Apr 13, 2026

    Same issue for me as well. This is happening to me constantly after updating to 1.4.x

    Image

  6. GuoChen-thlg commented on Apr 13, 2026

    @GuoChen-thlg
    GuoChen-thlg
    on Apr 13, 2026

    MaxListenersExceededWarning: Possible EventTarget memory leak detected. 11 event listeners added to [EventEmitter]. MaxListeners is undefined. Use events.setMaxListeners() to increase limit
    emitter: EventEmitter {
    _events: [Object ...],
    _eventsCount: 1,
    _maxListeners: undefined,
    [Symbol(kCapture)]: false,
    setMaxListeners: [Function: setMaxListeners],
    getMaxListeners: [Function: getMaxListeners],
    emit: [Function: emit],
    addListener: [Function: addListener],
    on: [Function: addListener],
    prependListener: [Function: prependListener],
    once: [Function: once],
    prependOnceListener: [Function: prependOnceListener],
    removeListener: [Function: removeListener],
    off: [Function: removeListener],
    removeAllListeners: [Function: removeAllListeners],
    listeners: [Function: listeners],
    rawListeners: [Function: rawListeners],
    listenerCount: [Function: listenerCount],
    eventNames: [Function: eventNames],
    },
    type: "event",
    count: 11,

      at overflowWarning (node:events:185:19)
  at addListener (node:events:158:22)
  at <anonymous> (/$bunfs/root/src/index.js:405906:19)
  at <anonymous> (/$bunfs/root/src/index.js:405830:29)
  at <anonymous> (/$bunfs/root/src/index.js:402641:13)
  at streamSSE (/$bunfs/root/src/index.js:402670:7)
  at streamEvents (/$bunfs/root/src/index.js:405804:19)
  at <anonymous> (/$bunfs/root/src/index.js:405902:24)
  at dispatch (/$bunfs/root/src/index.js:399067:30)
  at <anonymous> (/$bunfs/root/src/index.js:398985:16)
  at dispatch (/$bunfs/root/src/index.js:399067:30)
  at dispatch (/$bunfs/root/src/index.js:399067:30)
  at cors2 (/$bunfs/root/src/index.js:400749:16)
  at async dispatch (/$bunfs/root/src/index.js:399067:30)
  at async <anonymous> (/$bunfs/root/src/index.js:410107:20)
  at async dispatch (/$bunfs/root/src/index.js:399067:30)
  at async dispatch (/$bunfs/root/src/index.js:399067:30)
  at async <anonymous> (/$bunfs/root/src/index.js:399692:40)

  7. dinogon commented on Apr 14, 2026

    @dinogon
    dinogon
    on Apr 14, 2026

    Me too.

  8. XiaOldMan commented on Apr 14, 2026

    @XiaOldMan
    XiaOldMan
    on Apr 14, 2026

    MaxListenersExceededWarning: Possible EventTarget memory leak detected. 11 event listeners added to [EventEmitter]. MaxListeners is undefined. Use events.setMaxListeners() to increase limit
    emitter: EventEmitter {
    _events: [Object ...],
    _eventsCount: 1,
    _maxListeners: undefined,
    [Symbol(kCapture)]: false,
    setMaxListeners: [Function: setMaxListeners],
    getMaxListeners: [Function: getMaxListeners],
    emit: [Function: emit],
    addListener: [Function: addListener],
    on: [Function: addListener],
    prependListener: [Function: prependListener],
    once: [Function: once],
    prependOnceListener: [Function: prependOnceListener],
    removeListener: [Function: removeListener],
    off: [Function: removeListener],
    removeAllListeners: [Function: removeAllListeners],
    listeners: [Function: listeners],
    rawListeners: [Function: rawListeners],
    listenerCount: [Function: listenerCount],
    eventNames: [Function: eventNames],
    },
    type: "event",
    count: 11,

      at overflowWarning (node:events:185:14)
  at addListener (node:events:158:22)
  at <anonymous> (/$bunfs/root/src/index.js:405957:19)
  at <anonymous> (/$bunfs/root/src/index.js:405881:29)
  at <anonymous> (/$bunfs/root/src/index.js:363267:13)
  at streamSSE (/$bunfs/root/src/index.js:363296:7)
  at streamEvents (/$bunfs/root/src/index.js:405855:19)
  at <anonymous> (/$bunfs/root/src/index.js:405953:24)
  at dispatch (/$bunfs/root/src/index.js:348752:30)
  at <anonymous> (/$bunfs/root/src/index.js:348670:16)
  at dispatch (/$bunfs/root/src/index.js:348752:30)
  at dispatch (/$bunfs/root/src/index.js:348752:30)
  at cors2 (/$bunfs/root/src/index.js:350434:16)
  at async dispatch (/$bunfs/root/src/index.js:348752:30)
  at async <anonymous> (/$bunfs/root/src/index.js:410158:20)
  at async dispatch (/$bunfs/root/src/index.js:348752:30)
  at async dispatch (/$bunfs/root/src/index.js:348752:30)
  at async <anonymous> (/$bunfs/root/src/index.js:349377:40)

    已杀死

  9. thdxr
    removed
    bugSomething isn't working
    windows
    perfIndicates a performance issue or need for optimization
    webRelates to opencode on web / desktop
    on May 3, 2026

  10. github-actions commented on Jul 6, 2026

    @github-actions
    github-actionsBot
    on Jul 6, 2026 – with GitHub Actions
    Contributor

    To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.

  11. github-actions
    closed this as not plannedon Jul 6, 2026
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