diff --git a/cloud/docs/relay-reconnect-2026-09-findings.md b/cloud/docs/relay-reconnect-2026-09-findings.md index 706c1b37511..ab7787029aa 100644 --- a/cloud/docs/relay-reconnect-2026-09-findings.md +++ b/cloud/docs/relay-reconnect-2026-09-findings.md @@ -31,7 +31,7 @@ never raw ids. Nothing here is a production mutation record unless the "Mutation | Monitor dry-run #11 | Froze at sample 2 (10:08:07Z): `director.concurrency` 79.8 > 64, the c8/c20 re-dial. They crashed 10:05:54, 3 s before the waiter's quiet check passed (log ingestion lag). | run 33861578009 | | Monitor dry-run #12 | Dispatched 10:17:38Z after 10 quiet min; froze at sample 2 (10:19:24Z): `cell.production-gce-c16.health` 0. c16 did **not** crash (no container die, MIG NONE/HEALTHY, readiness=true throughout, `/health` 200 in 230 ms at 10:21). At 10:19:07–16 it logged "control activity renewal failed" x4 and a burst of 1006 closes, sqlFailures 1 -> 14, sqlLatencyMsMax 2588: a pg stall on the old image that did not reach the unhandled path. The probe's single fetch (30 s timeout) came back unavailable during that stall and `unavailableIsZero` turned it into health=0. | run 33862504601 | | Monitor dry-run #13 | Green 14 of 16 samples (10:48:38–11:03), froze 11:04:43Z: c9 crashed 11:04:23, c28 11:04:25 (then looped 11:05:04, 11:05:41); c15 probe also read 0 (stall, no crash). Missed by ~90 s. **Dispatched by hand 10:48:15Z** into a 43-min crash lull (last die 10:05:54; last director 500 10:31:49). The re-armed waiter never fired: its MIG-stable check used `grep -vc True`, which exits 1 when nothing matches, so `&&` short-circuited on the *healthy* case. Waiter armed 10:20Z: 10-min quiet + every MIG stable + 60 s recheck, then dispatch, then canary c7 on green. Held at 10:24 and 10:31 by lone director `/v1/assign` 500s (2 s pg-connect stalls, no cell crash). Director 500 events since 08:46: 6 (gaps 2.7/21/31/29/7.6 min). At 10:39 the waiter was re-armed with a 6-min director-500 window (the monitor's own delta is 5 min) instead of 10, since the gate only needs the 15 min *after* dispatch to be clean. Cell crashes have stopped since 10:05 (33+ min, longest gap since 08:40). 12 dry-runs: 1 pass (#6), 11 freezes, none on a real fleet-health regression. | Cascade gaps since 09:00: 31, 2.9, 5.1, 16.1, 4.0 min (median 5); a 15-min clean window is ~28% per attempt at this rate. | | -| Monitor dry-run #14 | Waiter re-armed 11:06Z (grep bug fixed: `grep -c` under `|| true`), same chain; holding through the 11:17 cascade and c14/c28 recreates. 13 dry-runs: 1 pass, 12 freezes. Since 08:40: 10 cascades, 75 container dies, gaps 20/31/3/5/16/4/6.5/58/13 min; only 3 windows of >=17 clean minutes existed in 2.6 h, and dry-runs hit two of them (#6 passed, #13 lost the third by 90 s). | +| Monitor dry-run #14 | Dispatched 11:26:53Z by the fixed waiter (first autonomous dispatch); c14, c23, c25, c15, c24, c19 died 11:30:59–11:31:08 (six cells, 13 min after the last cascade). Will freeze. Waiter re-armed 11:06Z (grep bug fixed: `grep -c` under `|| true`), same chain; held through the 11:17 cascade and c14/c28 recreates. 13 dry-runs: 1 pass, 12 freezes. Since 08:40: 10 cascades, 75 container dies, gaps 20/31/3/5/16/4/6.5/58/13 min; only 3 windows of >=17 clean minutes existed in 2.6 h, and dry-runs hit two of them (#6 passed, #13 lost the third by 90 s). | | Gate decision | Owner asked at 09:36Z to choose: A keep looping / B recalibrate `directorErrors` 0 -> small n / C human bypass. Ten dry-runs, four froze on this bar. Recommendation B+A. Note: B alone would not have passed #9 or #10 (cell health probes and a 12-error burst); it fixes the single-500 false freezes (#7, #8) only. | | | Batch roll | **Deferred by plan**: roll once with the lock-fix image instead of twice. | | | PR #18606 lock removal (root cause) | **Merged** 09:2xZ as 7b108abf71 after review, fix, re-verify; CI green | https://github.com/stablyai/orca/pull/18606 | @@ -388,7 +388,7 @@ SQL CPU 0.84 -> 0.78 in the preceding minutes, director concurrency 18–22 (idl 04:47 (5), 08:40 (10), 09:00 (5), 09:31 (c13, c23), 09:34 (c23 again, c14, c20, c9; c14/c20 crash-looping), 09:39 (c21, c24), 09:55 (c16, c8), 09:59 (c20), 10:05 (c8, c20), 10:19 (c16 stalled, no crash), then a 58-min lull, 11:04 (c9; c28 died 13x in 4 min, autoheal recreate 11:09Z, its 3rd recreate today), 11:17 (c10, c28 -again, c22, c23, c14 x9 looping; 23 dies in ~90 s; fleet 13.3k -> 10.8k). Waiter #14 held throughout. +again, c22, c23, c14 x9 looping; 23 dies in ~90 s; fleet 13.3k -> 10.8k), 11:31 (c14, c23, c25, c15, c24, c19). Director concurrency pinned at 85 for 09:32–09:33; 503s 4,141 and 4,396 per minute. 09:39: c21, c24 (2,870 503s). Crashes per instance 08:10–09:40Z: c28 x14, c27 x5, c23 x5, c22 x4, c14 x4, c13/c20 x3, then c26/c9/c24/c16/c8 x2. Mean gap between cascades since 08:40: ~12 min. Every 15-min gate attempt