temporalio / temporalio/sdk-python
[Bug] Heartbeat Task Slot information is not pulled when MetricBuffer is configured
Open
@Sushisource is already working on this.
Since Sep 8, 2026.
bug
- Dominant language
- Python
- Stars
- 1.2k
- Forks
- 241
- Avg merge
- 3d 21h
- Merged PRs (30d)
- 55
Description
What are you really trying to do?
Use MetricBuffer along with v1.32.0 Python SDK
Describe the bug
When MetricBuffer is configured on the Python SDK Worker, Task Slot information doesn't show up in Temporal Workers UI. When MetricBuffer is not used, Task Slot Information shows up in Temporal Workers UI.
Minimal Reproduction
https://github.com/bmcqueen-tmprl/temporal-py-heartbeat-slot-repro
Environment/Versions
Python 1.32.0 SDK
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.