fix(backends/chroma): release SQLite file lock on close_palace/close (#1067)#1105
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…emPalace#1067) ChromaBackend.close_palace() and close() evicted cached PersistentClients from self._clients without calling client.close(), so chromadb 1.5.x kept the rust-side SQLite file lock until GC. Reopening the same palace path after shutil.rmtree + re-create within one process then failed with SQLITE_READONLY_DBMOVED (SQLite code 1032). Add _close_client() helper with a try/except fallback for older chromadb, and route close_palace(), close(), and the DB-file-missing invalidation branch of _client() through it. The mtime/inode auto-invalidation branch is left as-is: callers there may still hold a live ChromaCollection handle, and closing out from under them clears the rust bindings mid-use. Regression tests cover close_palace reopen-same-path and whole-backend close for multiple palaces.
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Catches up on a heavy upstream day — 22 fixes merged in 24h plus prior backlog. Highlights pulled in: - MemPalace#1305 hooks: ~/.mempalace/ deletion is now a stable kill-switch (hooks no longer rebuild the dir hierarchy on Stop/PreCompact/SessionStart) - MemPalace#1214 KG: reject inverted intervals (valid_to < valid_from) at write time — prevents silently invisible triples - MemPalace#1067/MemPalace#1105 chroma: ChromaBackend.close_palace() now actually releases the SQLite file lock (PersistentClient.close() on evict + invalidation) - MemPalace#1215 entity_registry: atomic save (tmp+fsync+rename) — no more corruption on crash mid-write - MemPalace#1073/MemPalace#1107 mempalace compress: paginated drawer fetch — no longer trips SQLITE_MAX_VARIABLE_NUMBER on palaces >32k drawers - MemPalace#1282 stdio: Windows console UTF-8 reconfig for cli/mcp_server/hooks_cli - MemPalace#1164/MemPalace#1167 mcp KG: sanitize_iso_date() blocks malformed date strings silently producing empty result sets - MemPalace#1136/MemPalace#1160 mcp: per-path KG cache for multi-tenant hosts that rotate MEMPALACE_PALACE_PATH between tool calls - MemPalace#1286 mcp: retry _get_collection() once on transient failure - MemPalace#1138 lint cleanup, MemPalace#1019 search-crash fix - 4 new tools/ scripts (backup_claude_jsonls, find_orphan_claude_jsonls, render_jsonl, save.md) Conflict resolution (CHANGELOG.md only — code files all auto-merged): - 3.3.5 section: untouched (already merged in our prior commit; upstream added several new bug-fix entries which auto-merged cleanly) - 3.3.4 Bug Fixes: kept upstream's new MemPalace#1305 entry; preserved our richer detail on topic-tunnels (MemPalace#1194/MemPalace#1195/MemPalace#1197), HNSW-bloat (MemPalace#1191), max_seq_id (MemPalace#1135), and auto-ingest (MemPalace#1230/MemPalace#1231) — upstream's shorter topic-tunnels entry was a strict subset of ours. xdev patches preserved (still on this branch, untouched by merge): - 6ef44cb fix(hooks): route CC transcripts via convo_miner with cwd-based wings - 3fad61d fix(config): allow leading dash in wing names - 3fc821a fix(config): tighten leading-char to allow dash but not underscore Tests: 1557 passed, 1 skipped (full unit suite excluding benchmarks). Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
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Problem
ChromaBackend.close_palace()andclose()evict cachedPersistentClients fromself._clientswithout callingclient.close(). chromadb 1.5.x retains the rust-side SQLite file lock until GC, so reopening the same palace path aftershutil.rmtree+ re-create within one process fails:SQLite code 1032 is
SQLITE_READONLY_DBMOVED. Reported and diagnosed in #1067.Fix
_close_client()helper callsPersistentClient.close()with a try/except fallback for older chromadb that does not expose it. Three sites route through it:close_palace(palace): explicit per-palace teardownclose(): whole-backend shutdown, iterates cached clients before clearing_client()invalidation on missingchroma.sqlite3: palace rebuilt under usThe
_client()auto-invalidation branch onmtime/inodechange is left alone. Callers there may still hold a liveChromaCollectionbacked by the outgoing client; closing it would clear the rust bindings mid-use.Test plan
test_chroma_close_palace_releases_sqlite_lock_for_reopen: close, rmtree, reopen same pathtest_chroma_close_releases_all_cached_clients: two palaces, whole-backend close, each reopenabledevelopwith SQLite code 1032 and pass with the fixCredits @xelauvas for the diagnosis and proposed direction.
Fixes #1067.