[XLSX co-editing] ReferenceError: param is not defined in AscCommon.sendClientLog causes silent save failure (ExitCode 86)

[mosi-kha]

Environment

• DocumentServer version: 9.3.1
• Deployment: Docker (Kubernetes / Helm, single pod, 8 CPUs)
• Integration: Nextcloud + onlyoffice-nextcloud app
• File type affected: XLSX

Expected Behavior

XLSX file co-edited by multiple users simultaneously saves successfully back to Nextcloud. All changes persist after editors close the document.

Actual Behavior

During collaborative editing of an XLSX file with 6+ simultaneous editors, the forced save fails silently. The UI shows "All changes saved" but changes are not persisted to Nextcloud.

converter/out.log shows:

[ERROR] nodeJS - stderr:ReferenceError: param is not defined
    at Object.error (<anonymous>:23:318)
    at Object.a.AscCommon.qla.a.AscCommon.sendClientLog (<anonymous>:10027:47)
    at r (<anonymous>:20596:11)
    at C.Eve (<anonymous>:20967:467)
    at na.Eve (<anonymous>:20709:353)
    at <anonymous>:20678:461
    at d.Yn (<anonymous>:9607:83)
    at d.pa (<anonymous>:9607:29)
    at na.pti (<anonymous>:20678:437)
    at <anonymous>:20677:197
DoctRenderer:<result><error code="save" /></result>

[ERROR] nodeJS - ExitCode (code=86;signal=null;error:-86)

The same docId fails on all subsequent save retries (not transient). Example: docId 954965759 failed at 11:12, 11:32, and 11:34 on the same day with identical errors.

Steps to Reproduce

1. Open an XLSX file via Nextcloud + OnlyOffice integration
2. Have 6+ users open and actively edit the same file simultaneously
3. Let the auto-save / forced save trigger (or close document)
4. Observe converter/out.log — ReferenceError: param is not defined in sendClientLog
5. Reopen file — all co-editing changes are lost

Additional Context

• Error is inside minified JS (sdk-all.js anonymous functions), so param is the mangled variable name
• A secondary issue occurs in the same sessions: JWT authorization header grows to ~12KB with many co-editors (authorization too large, size reduced from 12215 to 735), which may be related
• ExitCode 86 = DoctRenderer save error
• Also observed: x2t crashes with SIGABRT / std::bad_alloc during thumbnail generation for large XLSX files (separate memory issue)
• Daily pod restart at 17:24 UTC (log truncation observed)
• Searched existing issues — no prior report matches this exact sendClientLog error path

[davideul]

Hi,

same problem (code=86) here with:

• DocumentServer version: 9.3.1.10 EE
  

• Deployment: Podman  under RedHat
  

• Integration: Seafile
  

• File type affected: XLSX
  

[igwyd]

Hello @mosi-kha, I tried to your scenario on my setup, but I don't get this error. It doesn't happen even when I forcesave or when I close all files after editing. Could you tell me what version of Nexcloud and the onlyoffice-nexcloud plugin you're using? Perhaps there are some other special features, for example, how do you share a file for collaborative editing?

[mosi-kha]

Hello @davideul
We use Nextcloud 32.0.2 and OnlyOffice app 9.13.0. The file was stored in a team folder (groupfolders app 20.1.6), so users from a group have access to it and work.

[igwyd]

Unfortunately, we can't reproduce the problem. Most likely, the issue is with a specific file or changes. Could you send us your file files@onlyoffice.com with the subject DocumentServer#xxxx so we can check it?

[igwyd]

@mosi-kha We checked your traceroute and couldn't figure out which deployment this server is from. The source code indicates it's not our image. How did you install the document server? Which image did you use? Please provide a link to the DockerHub image.