Issues

• HA: a node removed from the Raft configuration may still accept writes and stall each one for the quorum timeout (follow-up to #9411)

  concurrencyhaseverity:minor
  ArcadeData/arcadedb#9510 · Filter by author robfrank opened on Oct 8, 2026 · 26.11.1

• Studio: API endpoint list, Resources TOC and Profiler rows are click-only, not keyboard accessible

  enhancementseverity:minorstudio
  ArcadeData/arcadedb#9508 · Filter by author robfrank opened on Oct 8, 2026 · 26.11.1

• LSM_VECTOR build() over a populated index appends a second entry per record; nodes then disagree on countEntries after a search or a delete

  bugenginehaseverity:minorvector
  ArcadeData/arcadedb#9506 · Filter by author robfrank opened on Oct 8, 2026 · 26.11.1

• A sole voter whose snapshot marker runs ahead of its applied entries (#6111 stale-snapshot floor) has no operator override either

  enhancementgrpchaserverseverity:minor
  ArcadeData/arcadedb#9498 · Filter by author robfrank opened on Oct 8, 2026 · 26.11.1

• SQL GROUP BY costs about 170 ns of CPU per aggregate per row: TPC-H Q1 at SF1 is about 10x PostgreSQL on the same cores

  engineperformanceseverity:minorsql
  ArcadeData/arcadedb#9496 · Filter by author tae898 opened on Oct 8, 2026

• UPDATE/DELETE via HTTP API -> 500 NoSuchMethodException: SelectStatement.<init>() in DmlSourcePlanKey.newSource; workaround profileExecution:detailed

  bugserverseverity:minorsqlworkaround-provided
  ArcadeData/arcadedb#9495 · Filter by author zek0 opened on Oct 8, 2026

• A commit walks every slot of each bucket page it modified to prove the page has no hole: 56% to 58% of the commit of a one-update transaction, 29% of a three-statement transaction's CPU

  engineperformanceseverity:minorstorage
  ArcadeData/arcadedb#9483 · Filter by author tae898 opened on Oct 8, 2026 · 26.11.1

• LSM_SPARSE_VECTOR top-K: queries just under the 200,000-posting partitioning threshold run serially and set the p99; a threshold of 50,000 to 100,000 cuts their p99 by 2.3x to 2.7x and the whole run's by 18 percent (100k SPLADE vectors, 4 cores)

  enginein progressperformanceseverity:minorvector
  ArcadeData/arcadedb#9482 · Filter by author tae898 opened on Oct 8, 2026 · 26.11.1
  

• Tests: replace Mockito mocks of server/HA types with real objects and hand-written fakes

  boltenhancementgremlingrpchain progressserverseverity:minor
  ArcadeData/arcadedb#9464 · Filter by author robfrank opened on Oct 7, 2026 · 26.11.1
  

• TIMESERIES: rows of acknowledged commits are missing after a kill -9 while COMPACT TIMESERIES TYPE runs concurrently, at txWalFlush 1 and 2 (the same transaction's document update survives)

  bugconcurrencyin progressseverity:criticalstoragetimeseries
  ArcadeData/arcadedb#9452 · Filter by author tae898 opened on Oct 7, 2026 · 26.11.1
  

• [concurrency] Index lookups read index metadata or type unguarded and fail when an index is dropped concurrently

  concurrencyin progressparent-issueseverity:minor
  ArcadeData/arcadedb#9362 · Filter by author github-actions opened on Oct 6, 2026 · 26.11.1
  

• Issue6295AlgoUnguardedPhaseTest.hashGnnObservesTheDeadlineInsideTheMinHashReduction races the clock: ~4x margin over the 1 s deadline

  bugenginein progressseverity:minor
  ArcadeData/arcadedb#9360 · Filter by author robfrank opened on Oct 6, 2026 · 26.11.1
  

• A range index on a Cypher duration property orders by ISO text, not by duration

  bugenginein progressopencypherseverity:minor
  ArcadeData/arcadedb#9348 · Filter by author lvca opened on Oct 6, 2026 · 26.11.1
  

• Count push-downs over an undirected hop count a self-loop twice (Neo4j and the ordinary pipeline count it once)

  bugengineopencypherseverity:minor
  ArcadeData/arcadedb#9283 · Filter by author lvca opened on Oct 5, 2026 · 26.11.1
  1

  

• Roadmap: per-edge-type adjacency for supernodes (staged storage-format change, 26.11.1 to 27.x)

  engineenhancementparent-issueperformanceseverity:minorstorage
  ArcadeData/arcadedb#9269 · Filter by author robfrank opened on Oct 5, 2026
  

• #8868 opt-in writer for per-edge-type adjacency, HA capability gate, migration on promotion

  concurrencyengineenhancementhaperformanceseverity:minorstorage
  ArcadeData/arcadedb#9268 · Filter by author robfrank opened on Oct 5, 2026 · 27.1.1
  

• #8868 read support for the per-edge-type directory record (no writer)

  engineenhancementhaperformanceseverity:minorstorage
  ArcadeData/arcadedb#9267 · Filter by author robfrank opened on Oct 5, 2026 · 26.12.1
  

• #8868 design: per-edge-type adjacency layout, record type, rollout and compatibility

  documentationengineenhancementhain progressseverity:minorstorage
  ArcadeData/arcadedb#9264 · Filter by author robfrank opened on Oct 5, 2026 · 26.11.1
  

• #8868 per-edge-type adjacency ON by default (FORWARD-INCOMPATIBLE release)

  engineenhancementperformanceseverity:minorstorage
  ArcadeData/arcadedb#9263 · Filter by author robfrank opened on Oct 5, 2026
  

• [ha] HA: apply one consistent rule for learning or deriving a joined peer's HTTP address on all nodes

  haparent-issueseverity:minor
  ArcadeData/arcadedb#9255 · Filter by author github-actions opened on Oct 5, 2026 · 26.11.1

• Planner and SQL graph callers still take the record path on the first call after a restore; whole-graph fallback coverage is looser than the exact-match lookup

  engineopencypherperformanceseverity:minorsql
  ArcadeData/arcadedb#9240 · Filter by author lvca opened on Oct 4, 2026 · 26.11.1
  1

  

• NOTUNIQUE_HASH insert cost grows with the number of RIDs per key (rewrites the whole entry per insert)

  engineperformanceseverity:minorstorage
  ArcadeData/arcadedb#9228 · Filter by author lvca opened on Oct 4, 2026 · 26.11.1
  

• MongoDB wire: restore index use for non-_id filters (SQL superset pre-filter + matcher)

  enhancementmongodb-wireperformanceseverity:minor
  ArcadeData/arcadedb#9162 · Filter by author lvca opened on Oct 4, 2026 · 26.11.1
  

• redisw: apply the argument-count check to the redis query language path

  enhancementredisseverity:minor
  ArcadeData/arcadedb#9161 · Filter by author lvca opened on Oct 4, 2026 · 26.11.1
  

• Issue741InOperatorEdgeCompositeIndexTest.inValuesAreOrderedAsTheIndexStoresThemNotAsWritten fails on main (plan assertion)

  bugseverity:minorsql
  ArcadeData/arcadedb#9072 · Filter by author lvca opened on Oct 3, 2026 · 26.11.1