---
id: "bug-855"
status: "fixed"
status_updated: "2026-09-24"
status_note: ""
component: "controller"
severity: "unknown"
timestamp: "2026-06-22T03:10:06.653962Z"
last_seen: "2026-09-19T09:00:00Z"
occurrences: 1
files: ["src/controller/testsuite/test_config_repl.c (tests) / src/controller/persist.c:705 (guard)"]
tags: ["controller-test", "stale-report", "ha-term-safety", "wal-catchup", "EAGAIN", "not-a-regression", "contiguity-guard", "bug-850", "pre-existing"]
related: ["bug-850", "bug-851"]
legacy: true
---

# bug-855: controller_unit_test: 6 test_wal_catchup_* tests FAIL (Expected ... Was -11/-EAGAIN or wrong…

## Description
controller_unit_test: 6 test_wal_catchup_* tests FAIL (Expected ... Was -11/-EAGAIN or wrong applied_lsn) on the raft_tla checkpoint branch

## Environment
_Not recorded (migrated from buglog.json)._

## Reproduction
_Not recorded (migrated from buglog.json)._

## Root cause
PRE-EXISTING on checkpoint 20e59d0, NOT caused by ha-term-safety 1.1/1.2. The bug-850 contiguity guard (persist.c:705 rejects lsn>current_lsn with -EAGAIN) is committed at HEAD, but the test_wal_catchup_* tests feed forward-gap LSNs (30, 42) into a FRESH persist (current_lsn~=1) and still expect them to apply -> guard returns -EAGAIN -> applied_lsn does not advance. ha-term-safety changes touch only vote/schema/typemap/stubs; git diff --stat shows ZERO changes to persist.c/config_repl.c/test_config_repl.c. Also a separate run TIMED OUT 300s (the bug-850 DNR /tmp fsync-EIO + commit-WAIT signature; environment artifact on overlayfs).

## Fix
FIXED (verified 2026-07-02): ran controller_unit_test directly — all test_wal_catchup_* tests (append_term_fields_round_trip, entry_advances_applied_lsn, entry_error_skipped_no_crash, entry_null_entry_no_crash, batch_advances_applied_lsn, partial_batch, batch_error_entry_skipped, batch_zero_entries_fallback, batch_256_entries) PASS. Landed as part of ha-term-safety's WAL term-index work (owner this bug deferred to).

## Verification
_Not recorded (migrated from buglog.json)._

## References
- Related: bug-850, bug-851