Record watcher issue in UI Builder

[pbodlev]

Hello,

I have created a record watcher in my custom workspace. But unfortunatelly it is not working. Here is the message that I recieve.

"403:Denied authorization to subscribe to /rw/** by processor: RecordWatcherAMBProcessor:subscribe_denied"

I am trying to subscribe to sysevent table to track custom events.

[pr8172510]

Hi,

Good question — this error is actually expected based on how Record Watcher (AMB) is designed in ServiceNow.

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1. Why you are getting this error

403: Denied authorization to subscribe to /rw/**
RecordWatcherAMBProcessor: subscribe_denied

This happens because:

• Record Watcher does NOT allow subscription to system tables like sysevent
• sysevent is a restricted/internal table
• AMB security blocks it for performance and security reasons

So this is not a misconfiguration — it’s a platform restriction

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2. Key limitation of Record Watcher

Record Watcher only works for:

Standard/allowed tables (like incident, task, custom tables)
System tables (sysevent, syslog, etc.)

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3. Recommended approach → Use a custom table (best practice)

Instead of watching sysevent, do this:

 Create a custom table (e.g., u_event_tracker)

Then:

• When your event is triggered
• Write a record into this custom table

Now:

• Use Record Watcher on u_event_tracker
• UI Builder will successfully subscribe

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4. Alternative → Use Scripted REST / Event-driven refresh

If you need real-time behavior:

• Trigger UI refresh via Data Broker / Client State
• Or use:
  • Scripted REST API
  • Polling (less ideal)

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5. If using events (proper pattern)

Correct architecture:

• Event (sysevent) → backend processing
• Custom table / record → frontend tracking
• Record Watcher → UI update

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6. Debugging tip

If you want to confirm:

• Try subscribing to incident table → it will work
• Same setup on sysevent → will fail (by design)

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7. Best practice

✔ Never use Record Watcher on system tables
✔ Use intermediary table for UI updates
✔ Keep AMB subscriptions lightweight

[tomasscerba]

Hi @pbodlev ,

you need to have read/write access to that record in order to "watch" the record.