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Trouble with Prefect crashes

1 post from 1 person1d activeFading, +0 this weekunverified

Posts per day

Posts per day1 posts, Oct 27 to Nov 11

The posts behind it

GitHub issuesPrefectHQ/prefect · chuqCTCOct 27

`Flow.serialize_parameters` crashes on errors other than `TypeError`/`ValueError`/`RecursionError` from `jsonable_encoder`

### Bug summary `Flow.serialize_parameters` falls back to the `" "` placeholder only for `TypeError`, `ValueError` and `RecursionError`. `jsonable_encoder` deep-copies dataclasses, so any other exception raised by a parameter's `__reduce__` escapes, and the flow run fails before...

Companies and products named

1 post
About this problem

Evidence

1 post from 1 person in 1 place. Mostly on PrefectHQ/prefect.

Frustration Frustration 0 of 3· Seen on GitHub issues

How it was grouped

Posts about Prefect with no known issue, sharing the word "crashes". First post Oct 27, 2026, latest Oct 27, 2026. Unverified: fewer than 3 posts, or one person or place only. Method

Other Prefect problems

Prefect users keep filing bugs

Top post: "V2 UI feedback: Bug or incorrect behavior", one of 24 posts from 19 people on GitHub issues.

Prefect upgrades break working setups

17 posts from 16 people on GitHub issues.

Trouble with Prefect flow

Top post: "Flow run graph polls graph-v2 every second for the whole run, rebuilding the full graph each time", one of 16 posts from 12 people on GitHub issues.

Trouble with Prefect deployment

Top post: "Worker crashes when reading the deployment fails with a non-404 error before submitting a run", one of 3 posts from 3 people on GitHub issues.

Prefect rate limits and usage caps block work

3 posts from 3 people on GitHub issues.

Prefect lock-in makes switching costly

2 posts from 2 people on GitHub issues. Unverified.

Trouble with Prefect missing

Top post: "V2 UI feedback: Missing feature - Filter by tags search box", one of 2 posts from 2 people on GitHub issues. Unverified.

Trouble with Prefect list

One post on GitHub issues: "hash_objects erases tuple/list and int/str-key distinctions, so task_input_hash serves stale cached results". Unverified.

Trouble with Prefect deployments

One post on GitHub issues: "(ui-v2) Quick Run from deployments list navigates away when selecting from enum dropdown". Unverified.

History

First seen with 1 post; the top post now: "`Flow.serialize_parameters` crashes on errors other than `TypeError`/`ValueError`/`RecursionError` from".

Nov 11, 2026