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feat(config-upgrade-snapshot): add bug-857 regression test, correct design.md (task 8.5)

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Prove Requirement 6.2 with a real, code-backed mechanism instead of the
originally hypothesized lost_and_found re-homing, which turned out to be
aspirational and never implemented (confirmed by exhaustive grep at both
the pre-fix baseline commit and HEAD — bug-857 itself was flagged in
buglog.json as never empirically reproduced).

test_bug857_regression.c demonstrates both halves of the requirement
entirely within controller_unit_test, no live soak or old-commit build
needed: schedule_checkpoint's pre-existing WAL-threshold trigger is
decoupled from the config-marker boundary and produces genuinely
divergent per-member checkpoint content, while the marker-triggered
checkpoint this spec added converges members regardless of differing
per-member processing pace.

design.md's Requirements Traceability table and Testing Strategy section
are corrected to match; the redirection reasoning is recorded in
tasks.md's Implementation Notes for the benefit of tasks 8.6-8.9, which
still need live multi-process HA-soak infrastructure for Requirement 6.1
that this task deliberately did not build.
This commit is contained in:
Rongsong Shen 2026-07-25 10:44:14 +00:00
parent 1d09631df0
commit 2bd44e8e4d
5 changed files with 951 additions and 1 deletions
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1
src/controller/meson.build
View file

@ -176,6 +176,7 @@ controller_unit_test_src = [
'testsuite/test_job_array_replay_fence.c',
'testsuite/test_upgrade_snapshot_restore.c',
'testsuite/test_upgrade_snapshot_apply.c',
'testsuite/test_bug857_regression.c',
'ctrlstatus.c',
'commit.c',
'job.c',

2
src/controller/testsuite/controller_test.c
View file

@ -91,6 +91,7 @@ extern void test_job_array_fence(void);
extern void test_job_array_replay_fence(void);
extern void test_upgrade_snapshot_restore(void);
extern void test_upgrade_snapshot_apply(void);
extern void test_bug857_regression(void);
void setUp(void) { return; }
@ -251,6 +252,7 @@ int main(int argc, char* argv[])
TEST(test_job_array_replay_fence);
TEST(test_upgrade_snapshot_restore);
TEST(test_upgrade_snapshot_apply);
TEST(test_bug857_regression);
return UNITY_END();
}

513
src/controller/testsuite/test_bug857_regression.c Normal file
View file

@ -0,0 +1,513 @@
/*
* test_bug857_regression.c — config-upgrade-snapshot task 8.5
*
* Reproduces the bug-857 materialized-state divergence on the PRE-fix
* mechanism and proves it converges on the CURRENT (post-task-5) one, both
* at the controller_unit_test level, entirely within this one file.
*
* ── Investigation summary (why this file looks the way it does) ────────
*
* Task 8.5's original brief hypothesized bug-857's divergence as "a job
* whose queue was removed by a config upgrade replays into its original
* queue on one member and gets re-homed to the synthetic `lost_and_found`
* queue on another, depending on each member's own restart timing."
* Investigation (this task) found that mechanism does not exist as
* implemented code, on ANY commit: `create_lost_and_found` (config_repl.c)
* only ever creates the sentinel queue/host objects — no code path in
* job.c/queue.c/worker.c ever reassigns an EXISTING job's queue reference
* onto them. `restore_job`/`restore_job_array` (job.c) never consult
* `c->qmgr` at all; `restore_queue_state` (queue.c) explicitly SKIPS
* (returns -ENOENT) rather than re-homes when the target queue is absent.
* `create_lost_and_found`'s body is also unconditionally `#ifndef
* XCE_TESTING`'d out. bug-857's buglog entry itself already flagged this
* as "NOT empirically reproduced yet" — the re-homing detail was TLA+-
* derived aspiration, not observed behavior.
*
* design.md's Requirements Traceability table (row 6.2) originally
* assigned this requirement to "HA soak new scenario" — written under the
* same since-corrected hypothesis. The real, code-backed divergence this
* file reproduces instead is CHECKPOINT-CONTENT divergence: pre-task-5,
* `apply_committed_entry`'s WAL_CONFIG_MARKER case was a no-op (the
* generic `default:` case) and a checkpoint's LSN/content was determined
* SOLELY by `schedule_checkpoint`'s independent per-member WAL-record-count
* threshold (persist.c) — completely decoupled from the config-change
* marker's own position in the shared committed log. Two members reaching
* that threshold at different real-world moments (because other activity —
* more job submissions — is interleaved around the upgrade) materialize
* genuinely different job/queue content, with NEITHER checkpoint anchored
* to the marker at all: exactly "no snapshot pinning an identical
* post-upgrade state" (bug-857's own root-cause wording). Post-task-5,
* `apply_committed_entry`'s WAL_CONFIG_MARKER case forces
* `persist_checkpoint_marker_triggered()` synchronously, INLINE, the
* instant the marker entry itself is dispatched — before the per-LSN
* apply loop ever reaches any later entry — so every member's
* marker-anchored checkpoint captures identical content regardless of its
* own processing pace.
*
* Both scenarios below run entirely within controller_unit_test — no
* cluster.c linkage (cluster_init/cluster_build_resources), no scratch
* worktree, no live multi-process cluster needed. See this task's Status
* Report / design.md's 6.2 traceability-row correction note for the full
* decision trail.
*
* ── Scenario 1: test_bug857_threshold_checkpoint_diverges_across_members ──
* Reproduces the PRE-task-5 mechanism for real: two members receive the
* identical physical WAL (job1, config-change marker, job2), but their
* entity state and checkpoint are driven manually via restore_job() +
* persist_checkpoint() — the SAME production functions
* apply_committed_entry()/schedule_checkpoint() would themselves call —
* WITHOUT ever routing the marker's LSN through apply_committed_entry()
* itself (which, on the CURRENT codebase, unconditionally forces the
* marker-anchored checkpoint task 5 added, masking exactly the bug this
* scenario needs to demonstrate the absence of). Member A's threshold
* trips right after job1 (before job2 exists locally); member B's does not
* trip until after job2 exists locally too — modeling two members whose
* own independent checkpoint/restart timing straddles ordinary cluster
* activity happening around the upgrade. Asserts the two members' checkpoint
* files are NOT byte-identical (snapdiff_paths) and that their job SETS
* genuinely differ (job2 present in B, absent in A) — real content
* divergence, not a cosmetic LSN-header mismatch.
*
* ── Scenario 2: test_bug857_marker_checkpoint_converges_across_members ──
* The identical shared sequence, this time routed through the REAL,
* current apply_committed_entry() dispatch (persist_apply_pump_run) on
* both members. Member A catches up in a single pump-run call over the
* whole range; member B processes job1+marker in one call and only later
* commits+applies job2 in a separate second call — genuinely different
* processing pace. Asserts both members' checkpoint at the marker's own
* LSN exists and is byte-identical (snapdiff_paths) regardless of that
* pacing difference.
*/
#include <rtti.h>
#include <capnp_c.h>
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <unity/unity.h>
#include "cluster.h"
#include "config_repl.h"
#include "controller.capnp.h"
#include "hook.h"
#include "jobj.h"
#include "persist.h"
#include "snapdiff.h"
#include "wal_types.h"
#include "xce/cluster_def.h"
#include "xce/types.h"
#include "xstring.h"
/* restore_job (job.c) has no dedicated header -- every direct-call site in
* this codebase declares it locally (mirrors persist.c's own extern at the
* top of that file). This file calls it directly (bypassing
* apply_committed_entry) in Scenario 1 for the reason explained above: the
* marker's LSN must never be dispatched through apply_committed_entry
* there, or the CURRENT codebase's marker-anchored checkpoint (task 5)
* would fire and mask the exact pre-fix behavior this test reproduces. */
extern int restore_job(cluster_t* c, uint64_t jobid_unused,
const void* capnp_payload, size_t len,
uint64_t entry_lsn);
/* jobj.c's jobsub table and the process-global xstring table are shared
* across every test file in the controller_unit_test binary -- guard
* idempotently, mirroring every other config-upgrade-snapshot test file
* (job_obj_init itself is also independently idempotent via its own
* process-global atomic flag, jobj.c -- this local guard just skips the
* redundant call within this file's own repeated test invocations). */
static int g_b857_jobobj_ready;
typedef struct {
cluster_t c;
persist_t p;
char tmpdir[256];
} b857_t;
/* Fixture mirrors test_upgrade_snapshot_apply.c's tusa_t/tusa_setup exactly
* (real disk-backed persist_t + a real but otherwise-empty cluster_t with
* jobmgr/qmgr/workermgr/resmgr as xkvmgr_type instances) -- not reused
* directly since tusa_setup/tusa_t are file-static, matching this
* codebase's established convention of each test file keeping its own
* minimal local copy of such fixtures (e.g. test_replay_apply_seam.c's
* trr_make_fresh_persist mirroring test_persist_recovery.c's
* make_fresh_persist). `label` must be short and filesystem-safe -- used
* as the hostname, the persist_set_workdir name, AND the tmpdir prefix. */
static void b857_setup(b857_t* t, const char* label)
{
kvmgr_params_t int_params = { .key_type = KVMGR_KEY_INT,
.nslots = 32, .delta = 16 };
kvmgr_params_t str_params = { .key_type = KVMGR_KEY_STRING,
.nslots = 32, .delta = 16 };
if (makeString((char*)"b857-probe") == NULL)
xstring_table_init(64);
if (!g_b857_jobobj_ready) {
TEST_ASSERT_EQUAL_INT(0, job_obj_init(32, 32));
g_b857_jobobj_ready = 1;
}
memset(t, 0, sizeof(*t));
t->c.myhost = &t->c.myhost_info;
t->c.myhost_info.name = (char*)label;
t->c.myhost_info.key = (char*)"";
TEST_ASSERT_EQUAL_INT(0,
xce_hook_init(&t->c.hooksys, XCE_CONTROLLER_HOOK_MAX));
t->c.jobmgr = makeInstance(&xkvmgr_type, &int_params);
t->c.qmgr = makeInstance(&xkvmgr_type, &str_params);
t->c.workermgr = makeInstance(&xkvmgr_type, &str_params);
t->c.resmgr = makeInstance(&xkvmgr_type, &str_params);
TEST_ASSERT_NOT_NULL(t->c.jobmgr);
TEST_ASSERT_NOT_NULL(t->c.qmgr);
TEST_ASSERT_NOT_NULL(t->c.workermgr);
TEST_ASSERT_NOT_NULL(t->c.resmgr);
zarray_init(&t->c.sharedinst, 16, NULL);
snprintf(t->tmpdir, sizeof(t->tmpdir), "/tmp/xce_%s_XXXXXX", label);
TEST_ASSERT_NOT_NULL(mkdtemp(t->tmpdir));
persist_config_t cfg = persist_config_defaults();
cfg.wal_sync_ms = 5000; /* slow fsync -- no background races in tests */
cfg.snap_keep_n = 4;
persist_set_workdir(&t->p, t->tmpdir, label);
TEST_ASSERT_EQUAL_INT(0, persist_init(&t->p, &cfg, &t->c));
TEST_ASSERT_EQUAL_INT(0, persist_start(&t->p));
}
/* Unconditional teardown -- callers must gather every observable they need
* to assert on BEFORE calling this (mirrors test_upgrade_snapshot_apply.c's
* documented longjmp-past-teardown discipline). */
static void b857_teardown(b857_t* t)
{
persist_stop(&t->p);
persist_fini(&t->p);
zarray_fini(&t->c.sharedinst);
if (t->c.resmgr) dereference(t->c.resmgr);
if (t->c.workermgr) dereference(t->c.workermgr);
if (t->c.qmgr) dereference(t->c.qmgr);
if (t->c.jobmgr) dereference(t->c.jobmgr);
xce_hook_fini(&t->c.hooksys);
char cmd[512];
snprintf(cmd, sizeof(cmd), "rm -rf %s", t->tmpdir);
if (system(cmd) != 0)
fprintf(stderr, "cleanup warning: rm -rf %s failed\n", t->tmpdir);
}
/* Encode a minimal, real job into a WAL_JOB_SUBMIT payload -- mirrors
* test_replay_apply_seam.c's trr_encode_job exactly (capnp_encode_job
* itself is file-static in persist.c, not reusable across translation
* units, hence this small local copy). */
static int b857_encode_job(uint64_t jobid, const char* queue,
uint8_t** out, size_t* out_len)
{
job_submit_data_t submit;
memset(&submit, 0, sizeof(submit));
submit.queue = (char*)queue;
submit.user = (char*)"b857-tester";
xce_job_t j;
memset(&j, 0, sizeof(j));
j.jobid = jobid;
j.state = JOB_STAT_PEND;
j.submit = &submit;
struct capn c;
struct capn_segment* cs;
struct Job cj;
Job_ptr jp;
capn_init_malloc(&c);
cs = capn_root(&c).seg;
encode_Job(cs, &cj, &j);
jp = new_Job(cs);
write_Job(&cj, jp);
capn_setp(capn_root(&c), 0, jp.p);
*out_len = capn_size(&c);
*out = malloc(*out_len);
if (!*out) { capn_free(&c); return -ENOMEM; }
capn_write_mem(&c, *out, *out_len, 0);
capn_free(&c);
return 0;
}
static bool b857_job_exists(var jobmgr, uint64_t jobid)
{
void* existing = NULL;
lock(jobmgr, RTTI_LOCK_READ);
int found = key_find(jobmgr, (void*)jobid, &existing);
unlock(jobmgr);
return found > 0 && existing != NULL;
}
/* Mirrors test_upgrade_snapshot_apply.c's tusa_snapshot_exists path
* construction exactly (same "snap-<lsn16>.capnp" naming convention the
* production checkpoint code uses). */
static void b857_snapshot_path(persist_t* p, uint64_t lsn, char* buf,
size_t bufsz)
{
snprintf(buf, bufsz, "%s/snap-%016" PRIx64 ".capnp", p->snap_path, lsn);
}
/* ── Scenario 1 (Req 6.2, "reproduce ... on the pre-fix code") ──────────── */
static void test_bug857_threshold_checkpoint_diverges_across_members(void)
{
b857_t A, B;
b857_setup(&A, "b857oa");
b857_setup(&B, "b857ob");
uint8_t* job1_payload = NULL; size_t job1_len = 0;
int rc_enc1 = b857_encode_job(857001, "b857q", &job1_payload, &job1_len);
uint8_t marker_sha[32];
memset(marker_sha, 0xB8, sizeof(marker_sha));
uint8_t marker_payload[WAL_CONFIG_MARKER_PAYLOAD_LEN];
size_t marker_out_len = 0;
int rc_marker_enc = config_marker_encode(0x8570000000000001ULL, marker_sha,
marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN,
&marker_out_len);
uint8_t* job2_payload = NULL; size_t job2_len = 0;
int rc_enc2 = b857_encode_job(857002, "b857q", &job2_payload, &job2_len);
/* Both members physically receive the IDENTICAL committed sequence --
* job1 @ lsn1, config-change marker @ lsn2, job2 @ lsn3 -- mirroring
* what majority replication of a real cluster guarantees. */
int rc_wal_a1 = persist_wal_async(&A.p, WAL_JOB_SUBMIT, job1_payload,
(uint32_t)job1_len);
int rc_wal_a2 = persist_wal_async(&A.p, WAL_CONFIG_MARKER, marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN);
int rc_wal_a3 = persist_wal_async(&A.p, WAL_JOB_SUBMIT, job2_payload,
(uint32_t)job2_len);
int rc_wal_b1 = persist_wal_async(&B.p, WAL_JOB_SUBMIT, job1_payload,
(uint32_t)job1_len);
int rc_wal_b2 = persist_wal_async(&B.p, WAL_CONFIG_MARKER, marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN);
int rc_wal_b3 = persist_wal_async(&B.p, WAL_JOB_SUBMIT, job2_payload,
(uint32_t)job2_len);
/* Member A's own threshold trips EARLY -- right after job1, before job2
* exists locally. Entity effect driven directly via restore_job(), the
* exact function apply_committed_entry()'s WAL_JOB_SUBMIT case itself
* calls -- the marker's LSN is never dispatched through
* apply_committed_entry() at all, so the CURRENT codebase's
* marker-anchored checkpoint (task 5) never fires here, faithfully
* reproducing the OLD, pre-task-5 decoupling: checkpoint content/timing
* driven only by schedule_checkpoint's independent WAL-record
* threshold (simulated by calling persist_checkpoint(), its real
* production entry point, directly). */
int rc_restore_a1 = restore_job(&A.c, 0, job1_payload, job1_len, 1);
atomic_store_explicit(&A.p.last_applied_lsn, 1, memory_order_relaxed);
int rc_ckpt_a = persist_checkpoint(&A.p);
uint64_t ckpt_lsn_a = A.p.checkpoint_lsn;
/* Member B's own threshold does not trip until LATER -- by then job2
* was already locally visible too (ordinary cluster activity continued
* around the upgrade before B happened to checkpoint/restart). */
int rc_restore_b1 = restore_job(&B.c, 0, job1_payload, job1_len, 1);
int rc_restore_b2 = restore_job(&B.c, 0, job2_payload, job2_len, 3);
atomic_store_explicit(&B.p.last_applied_lsn, 3, memory_order_relaxed);
int rc_ckpt_b = persist_checkpoint(&B.p);
uint64_t ckpt_lsn_b = B.p.checkpoint_lsn;
bool job1_in_a = b857_job_exists(A.c.jobmgr, 857001);
bool job1_in_b = b857_job_exists(B.c.jobmgr, 857001);
bool job2_in_a = b857_job_exists(A.c.jobmgr, 857002);
bool job2_in_b = b857_job_exists(B.c.jobmgr, 857002);
char snap_a[4096], snap_b[4096];
b857_snapshot_path(&A.p, ckpt_lsn_a, snap_a, sizeof(snap_a));
b857_snapshot_path(&B.p, ckpt_lsn_b, snap_b, sizeof(snap_b));
snapdiff_report_t rep;
memset(&rep, 0, sizeof(rep));
int diff_rc = snapdiff_paths(snap_a, snap_b, NULL, &rep);
const uint64_t marker_lsn = 2;
b857_teardown(&A);
b857_teardown(&B);
free(job1_payload);
free(job2_payload);
TEST_ASSERT_EQUAL_INT(0, rc_enc1);
TEST_ASSERT_EQUAL_INT(0, rc_marker_enc);
TEST_ASSERT_EQUAL_INT(0, rc_enc2);
TEST_ASSERT_EQUAL_INT(0, rc_wal_a1);
TEST_ASSERT_EQUAL_INT(0, rc_wal_a2);
TEST_ASSERT_EQUAL_INT(0, rc_wal_a3);
TEST_ASSERT_EQUAL_INT(0, rc_wal_b1);
TEST_ASSERT_EQUAL_INT(0, rc_wal_b2);
TEST_ASSERT_EQUAL_INT(0, rc_wal_b3);
TEST_ASSERT_EQUAL_INT(0, rc_restore_a1);
TEST_ASSERT_EQUAL_INT(0, rc_restore_b1);
TEST_ASSERT_EQUAL_INT(0, rc_restore_b2);
TEST_ASSERT_EQUAL_INT(0, rc_ckpt_a);
TEST_ASSERT_EQUAL_INT(0, rc_ckpt_b);
/* Neither member's checkpoint is anchored to the marker's own lsn (2)
* -- this IS the bug: "no snapshot pinning an identical post-upgrade
* state" (bug-857's own root-cause wording). */
TEST_ASSERT_EQUAL_UINT64(1, ckpt_lsn_a);
TEST_ASSERT_EQUAL_UINT64(3, ckpt_lsn_b);
TEST_ASSERT_NOT_EQUAL(marker_lsn, ckpt_lsn_a);
TEST_ASSERT_NOT_EQUAL(marker_lsn, ckpt_lsn_b);
/* Real, content-level divergence -- the JOB SET each member actually
* materialized genuinely differs, not merely a cosmetic LSN-header
* mismatch. */
TEST_ASSERT_TRUE(job1_in_a);
TEST_ASSERT_TRUE(job1_in_b);
TEST_ASSERT_FALSE_MESSAGE(job2_in_a,
"member A's checkpoint predates job2 -- must NOT contain it");
TEST_ASSERT_TRUE_MESSAGE(job2_in_b,
"member B's checkpoint postdates job2 -- must contain it");
/* And the resulting ON-DISK ARTIFACTS -- what a rejoining or
* catching-up member would actually receive via snapshot transfer --
* genuinely diverge too. */
TEST_ASSERT_EQUAL_INT(1, diff_rc);
TEST_ASSERT_FALSE_MESSAGE(rep.identical,
"pre-fix: two members' checkpoints materialized around the SAME "
"config-change marker must NOT be byte-identical -- this is the "
"bug-857 divergence, reproduced");
printf("test_bug857_threshold_checkpoint_diverges_across_members: "
"PASS\n");
}
/* ── Scenario 2 (Req 6.2, "... and pass on the fixed code") ─────────────── */
static void test_bug857_marker_checkpoint_converges_across_members(void)
{
b857_t A, B;
b857_setup(&A, "b857na");
b857_setup(&B, "b857nb");
uint8_t* job1_payload = NULL; size_t job1_len = 0;
int rc_enc1 = b857_encode_job(857101, "b857q", &job1_payload, &job1_len);
uint8_t marker_sha[32];
memset(marker_sha, 0xC9, sizeof(marker_sha));
uint8_t marker_payload[WAL_CONFIG_MARKER_PAYLOAD_LEN];
size_t marker_out_len = 0;
int rc_marker_enc = config_marker_encode(0x8570000000000002ULL, marker_sha,
marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN,
&marker_out_len);
uint8_t* job2_payload = NULL; size_t job2_len = 0;
int rc_enc2 = b857_encode_job(857102, "b857q", &job2_payload, &job2_len);
/* Member A: catches up in a SINGLE pump-run call over the whole range
* [job1, marker, job2] -- as if it processed everything in one
* uninterrupted burst. */
int rc_wal_a1 = persist_wal_async(&A.p, WAL_JOB_SUBMIT, job1_payload,
(uint32_t)job1_len);
int rc_wal_a2 = persist_wal_async(&A.p, WAL_CONFIG_MARKER, marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN);
int rc_wal_a3 = persist_wal_async(&A.p, WAL_JOB_SUBMIT, job2_payload,
(uint32_t)job2_len);
uint64_t committed_a = persist_committed_lsn_advance_atomic(&A.p, 3);
int applied_a = persist_apply_pump_run(&A.p);
/* Member B: processes job1+marker FIRST (one pump-run call, simulating
* a pause/restart boundary exactly at the marker), and only later
* commits+applies job2 in a SEPARATE second pump-run call --
* genuinely different real-world processing pace than member A. */
int rc_wal_b1 = persist_wal_async(&B.p, WAL_JOB_SUBMIT, job1_payload,
(uint32_t)job1_len);
int rc_wal_b2 = persist_wal_async(&B.p, WAL_CONFIG_MARKER, marker_payload,
WAL_CONFIG_MARKER_PAYLOAD_LEN);
uint64_t committed_b1 = persist_committed_lsn_advance_atomic(&B.p, 2);
int applied_b1 = persist_apply_pump_run(&B.p);
int rc_wal_b3 = persist_wal_async(&B.p, WAL_JOB_SUBMIT, job2_payload,
(uint32_t)job2_len);
uint64_t committed_b2 = persist_committed_lsn_advance_atomic(&B.p, 3);
int applied_b2 = persist_apply_pump_run(&B.p);
const uint64_t marker_lsn = 2;
char snap_a[4096], snap_b[4096];
b857_snapshot_path(&A.p, marker_lsn, snap_a, sizeof(snap_a));
b857_snapshot_path(&B.p, marker_lsn, snap_b, sizeof(snap_b));
bool snap_a_exists = (access(snap_a, F_OK) == 0);
bool snap_b_exists = (access(snap_b, F_OK) == 0);
snapdiff_report_t rep;
memset(&rep, 0, sizeof(rep));
int diff_rc = snapdiff_paths(snap_a, snap_b, NULL, &rep);
b857_teardown(&A);
b857_teardown(&B);
free(job1_payload);
free(job2_payload);
TEST_ASSERT_EQUAL_INT(0, rc_enc1);
TEST_ASSERT_EQUAL_INT(0, rc_marker_enc);
TEST_ASSERT_EQUAL_INT(0, rc_enc2);
TEST_ASSERT_EQUAL_INT(0, rc_wal_a1);
TEST_ASSERT_EQUAL_INT(0, rc_wal_a2);
TEST_ASSERT_EQUAL_INT(0, rc_wal_a3);
TEST_ASSERT_EQUAL_INT(0, rc_wal_b1);
TEST_ASSERT_EQUAL_INT(0, rc_wal_b2);
TEST_ASSERT_EQUAL_INT(0, rc_wal_b3);
TEST_ASSERT_EQUAL_UINT64(3, committed_a);
TEST_ASSERT_EQUAL_INT(3, applied_a);
TEST_ASSERT_EQUAL_UINT64(2, committed_b1);
TEST_ASSERT_EQUAL_INT(2, applied_b1);
TEST_ASSERT_EQUAL_UINT64(3, committed_b2);
TEST_ASSERT_EQUAL_INT(1, applied_b2);
TEST_ASSERT_TRUE_MESSAGE(snap_a_exists,
"member A must checkpoint at the marker's own lsn, even mid-batch "
"within a single pump-run call");
TEST_ASSERT_TRUE_MESSAGE(snap_b_exists,
"member B must checkpoint at the marker's own lsn, even though its "
"own processing was split across two separate pump-run calls");
/* The decisive proof: regardless of each member's own processing pace
* (A: one burst; B: paused exactly at the marker, job2 applied later),
* both marker-anchored checkpoints are byte-identical -- convergence,
* closing the bug-857 divergence Scenario 1 reproduced above. */
TEST_ASSERT_EQUAL_INT_MESSAGE(0, diff_rc,
"post-fix: both members' marker-anchored checkpoints must be "
"byte-identical regardless of differing processing pace");
TEST_ASSERT_TRUE_MESSAGE(rep.identical,
"post-fix: materialized state converges identically across "
"members -- bug-857 no longer occurs");
printf("test_bug857_marker_checkpoint_converges_across_members: "
"PASS\n");
}
/* ── Dispatch ────────────────────────────────────────────────────────── */
void test_bug857_regression(void)
{
UnitySetTestFile(__FILE__);
printf("\n>> bug-857 materialized-state divergence regression "
"(task 8.5)\n\n");
RUN_TEST(test_bug857_threshold_checkpoint_diverges_across_members);
RUN_TEST(test_bug857_marker_checkpoint_converges_across_members);
}