[coverage] Conformance findings: CLOUDFETCH-017

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
62/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
typescript
Domain
backend

Research direction

Start with the CLOUDFETCH-017 expected-failure test in the linked coverage PR, then compare the behavior with the reference driver PR. Trace the Thrift CloudFetch chunk-download retry path for a persistent HTTP 500. Done means the caller's error preserves the download context and failed GET status instead of only reporting that the retry count was exceeded.

Written by the indexing model from the issue text.

Description

Surfaced by the multi-language coverage fan-out while conformance-testing these SPEC-IDs against databricks/databricks-sql-nodejs.

Each is committed as an expected-failure (xfail) test in the coverage PR — the test asserts the CORRECT behavior and stays red until this driver is fixed.

  • CLOUDFETCH-017: Thrift CloudFetch download failure loses its cause: after the chunk-download retry budget is exhausted on a persistent HTTP 500, the caller receives a bare "Max retry count exceeded" that identifies neither the chunk/result download nor the failed GET's HTTP status (SEA/kernel correctly surfaces "HTTP 500: Internal Server Error")

Reference driver PR: https://github.com/databricks/databricks-sql-go/pull/417
Coverage PR (reproducing xfail tests): https://github.com/databricks/databricks-driver-test/pull/1014

Dominant language
TypeScript
Stars
36
Forks
50
Avg merge
13h 46m
Merged PRs (30d)
9

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