[coverage] Conformance findings: LOGGING-003

[peco-engineer-bot]

Summary

Surfaced by the multi-language coverage fan-out while conformance-testing these SPEC-IDs against databricks/databricks-sql-python. Each finding is committed as an expected-failure (xfail) test in the coverage PR — the test asserts the CORRECT (post-fix) behavior and stays red until THIS driver (databricks/databricks-sql-python) is fixed, then flips green as a tripwire.

Findings

• LOGGING-003 [sea]: a kernel-backed session opened while logging is disabled leaves kernel log forwarding off for the whole process: the connector never invalidates pyo3_log's cached effective level, so raising the level and opening a new session delivers no databricks.sql.kernel records (databricks_sql_kernel.reset_logging() restores delivery)
  • failing test: test_disabled_log_level_leaves_kernel_forwarding_installable (see the coverage PR diff under tests/)

Reproduce & Expected

LOGGING-003 — Opening a kernel-backed session while the driver's log level is disabled/off must not permanently disable kernel log forwarding for the process: no kernel records are emitted while the level is off,…

Reproduce:

• First kernel-backed session/record attempt, while logging is disabled.
• Second kernel-backed session/record attempt, now at Warn.
• Poll the sink for the kernel record with a bounded deadline.

Expected (per the shared spec):

• completes without an exception
• full assertion contract:

result:
- no_exception: true
- label: level_disabled
  log_sink_contains_kernel_record: false
- label: level_raised
  log_sink_contains_kernel_record: true

Context

• The behavior was first fixed in a DIFFERENT driver — reference PR: feat(kernel): forward logs through shared logger databricks-sql-go#450 — which seeded the shared language-neutral spec. This issue tracks the same conformance gap in databricks/databricks-sql-python; the reference PR is for cross-referencing the intended behavior, NOT a change to this repo.
• Coverage PR carrying the reproducing xfail test(s): https://github.com/databricks/databricks-driver-test/pull/1394