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eab978f04d
* fix(skills): publish complete data-analysis cache generations * fix(skills): clean cache builds when manifest preparation fails * fix(skills): clean cache generations after failed replacement --------- Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
524 lines
17 KiB
Python
524 lines
17 KiB
Python
"""Real DuckDB cache lifetimes, using the production CSV loader without spatial."""
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import errno
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import json
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import multiprocessing
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import runpy
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import sys
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from pathlib import Path
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import pytest
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duckdb = pytest.importorskip("duckdb")
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pytest.importorskip("openpyxl")
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SCRIPT = (
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Path(__file__).resolve().parents[2]
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/ "skills/public/data-analysis/scripts/analyze.py"
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)
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def configure(cache, source):
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module = runpy.run_path(str(SCRIPT))
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scope = module["main"].__globals__
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scope["CACHE_DIR"] = str(cache)
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def load_csv(con, files):
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# Replace load_files dispatch with production CSV loading, avoiding the
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# optional INSTALL spatial setup. Cache, SQL and filesystem stay real.
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tables = {}
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for path in files:
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scope["_load_csv"](con, path, tables)
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return tables
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scope["load_files"] = load_csv
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sys.argv = [str(SCRIPT), "--files", str(source), "--action", "inspect"]
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return scope
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def worker(
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cache,
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source,
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started,
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finish,
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results,
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hold,
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load_barrier=None,
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*,
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require_cache_hit=False,
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):
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try:
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scope = configure(cache, source)
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if require_cache_hit:
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scope["load_files"] = lambda *_: pytest.fail(
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"reader must reuse the published cache"
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)
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if load_barrier is not None:
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loader = scope["load_files"]
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def gated_load(con, files):
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load_barrier.wait(10)
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return loader(con, files)
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scope["load_files"] = gated_load
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def inspect(con, tables):
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if hold:
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started.set()
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if not finish.wait(10):
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raise TimeoutError("parent did not release analysis")
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value = con.execute('SELECT value FROM "report"').fetchall()
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results.put(("ok", value))
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scope["action_inspect"] = inspect
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scope["main"]()
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except BaseException as error:
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results.put(("error", type(error).__name__, str(error)))
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@pytest.fixture
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def input_file(tmp_path):
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source = tmp_path / "report.csv"
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source.write_text("value\n7\n", encoding="utf-8")
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return source
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def test_second_process_reads_while_first_action_is_running(tmp_path, input_file):
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ctx = multiprocessing.get_context("spawn")
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started, finish, results = ctx.Event(), ctx.Event(), ctx.Queue()
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cache = tmp_path / "cache"
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first = ctx.Process(
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target=worker, args=(cache, input_file, started, finish, results, True)
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)
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second = ctx.Process(
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target=worker, args=(cache, input_file, started, finish, results, False)
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)
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first.start()
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try:
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assert started.wait(10), "first analysis must reach the action boundary"
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second.start()
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result = results.get(timeout=10)
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assert result == ("ok", [(7,)]), "cache reader overlapped a live writer"
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finish.set()
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assert results.get(timeout=10) == ("ok", [(7,)])
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finally:
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finish.set()
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for process in (first, second):
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if process.pid is not None:
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process.join(10)
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if process.is_alive():
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process.terminate()
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process.join(5)
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results.close()
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def test_failed_loader_leaves_no_database_for_retry(tmp_path, input_file):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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loader = scope["load_files"]
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def fail(con, files):
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loader(con, files)
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raise RuntimeError("loader interrupted after writing tables")
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scope["load_files"] = fail
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with pytest.raises(RuntimeError, match="loader interrupted"):
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scope["main"]()
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assert list(cache.rglob("*.duckdb")) == []
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def publication_worker(cache, source, published, release, results):
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"""Pause after real manifest publication, before its caller continues."""
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try:
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scope = configure(cache, source)
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# The regression also runs against the flat-cache implementation. Its
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# publication point exposes the map before closing the DuckDB writer.
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def pause():
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published.set()
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if not release.wait(10):
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raise TimeoutError("parent did not release publication")
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if "save_table_map" in scope:
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save = scope["save_table_map"]
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def pause_after_map(*args):
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save(*args)
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pause()
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scope["save_table_map"] = pause_after_map
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else:
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replace = scope["os"].replace
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def pause_after_replace(source_path, destination):
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replace(source_path, destination)
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if Path(destination).parent == cache / "generations-v1":
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pause()
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scope["os"].replace = pause_after_replace
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scope["action_inspect"] = lambda con, _: con.execute(
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"SELECT value FROM report"
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).fetchall()
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scope["main"]()
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results.put(("publisher-ok",))
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except BaseException as error:
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results.put(("error", type(error).__name__, str(error)))
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def test_reader_can_open_cache_at_publication_barrier(tmp_path, input_file):
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"""Publishing metadata must imply an independently readable database."""
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ctx = multiprocessing.get_context("spawn")
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published, release, results = ctx.Event(), ctx.Event(), ctx.Queue()
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cache = tmp_path / "cache"
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publisher = ctx.Process(
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target=publication_worker, args=(cache, input_file, published, release, results)
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)
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reader = ctx.Process(
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target=worker,
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args=(cache, input_file, published, release, results, False),
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kwargs={"require_cache_hit": True},
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)
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publisher.start()
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try:
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assert published.wait(10), "publisher must reach its real metadata publication"
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reader.start()
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assert results.get(timeout=10) == ("ok", [(7,)]), (
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"published cache is still owned by an import writer"
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)
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release.set()
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assert results.get(timeout=10) == ("publisher-ok",)
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finally:
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release.set()
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for process in (publisher, reader):
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if process.pid is not None:
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process.join(10)
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if process.is_alive():
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process.terminate()
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process.join(5)
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results.close()
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def test_action_failure_closes_connection(tmp_path, input_file, monkeypatch):
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scope = configure(tmp_path / "cache", input_file)
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connect = duckdb.connect
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opened = []
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def recording_connect(*args, **kwargs):
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con = connect(*args, **kwargs)
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opened.append(con)
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return con
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def fail(*args):
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raise RuntimeError("action failed")
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monkeypatch.setattr(duckdb, "connect", recording_connect)
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scope["action_inspect"] = fail
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with pytest.raises(RuntimeError, match="action failed"):
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scope["main"]()
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assert opened
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for con in opened:
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with pytest.raises(duckdb.ConnectionException):
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con.execute("SELECT 1")
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def test_corrupt_table_map_rebuilds_before_action(tmp_path, input_file):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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seen = []
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loader = scope["load_files"]
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def record_load(con, files):
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seen.append("load")
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return loader(con, files)
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scope["load_files"] = record_load
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scope["action_inspect"] = lambda con, tables: con.execute(
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'SELECT value FROM "' + tables["report"] + '"'
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).fetchall()
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scope["main"]()
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manifests = list(cache.rglob("*.json"))
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assert len(manifests) == 1
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data = json.loads(manifests[0].read_text(encoding="utf-8"))
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if "table_map" in data:
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data["table_map"] = {"report": "missing"}
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else:
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data = {"report": "missing"}
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manifests[0].write_text(json.dumps(data), encoding="utf-8")
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scope["main"]()
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assert seen == ["load", "load"]
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def test_simultaneous_cold_processes_publish_complete_generations(tmp_path, input_file):
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ctx = multiprocessing.get_context("spawn")
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started, finish, results, barrier = (
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ctx.Event(),
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ctx.Event(),
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ctx.Queue(),
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ctx.Barrier(2),
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)
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cache = tmp_path / "cache"
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processes = [
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ctx.Process(
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target=worker,
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args=(cache, input_file, started, finish, results, False, barrier),
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)
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for _ in range(2)
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]
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for process in processes:
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process.start()
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try:
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assert [results.get(timeout=15) for _ in processes] == [
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("ok", [(7,)]),
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("ok", [(7,)]),
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]
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scope = configure(cache, input_file)
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scope["load_files"] = lambda *_: pytest.fail("published cache must be reusable")
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with scope["open_analysis_cache"]([str(input_file)]) as (con, tables):
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assert con.execute('SELECT value FROM "report"').fetchall() == [(7,)]
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assert tables == {"report": "report"}
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finally:
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for process in processes:
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process.join(10)
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if process.is_alive():
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process.terminate()
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process.join(5)
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results.close()
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def manifest(cache):
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paths = list(cache.rglob("*.json"))
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assert len(paths) == 1
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return paths[0], json.loads(paths[0].read_text(encoding="utf-8"))
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@pytest.mark.parametrize(
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"damaged_map",
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[
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{"report": "report", "report_1": "report"},
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{"report": "report_1", "other": "report"},
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{"report": "report"},
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{"Report": "report", "report": "report_1"},
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],
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)
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def test_inconsistent_manifest_rebuilds_without_redirecting_sources(
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tmp_path, input_file, damaged_map
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):
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second = tmp_path / "other" / "report.csv"
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second.parent.mkdir()
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second.write_text("value\n99\n", encoding="utf-8")
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files = [str(input_file), str(second)]
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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with scope["open_analysis_cache"](files):
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pass
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path, data = manifest(cache)
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data["table_map"] = damaged_map
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path.write_text(json.dumps(data), encoding="utf-8")
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loads = []
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loader = scope["load_files"]
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def record_load(con, paths):
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loads.append(True)
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return loader(con, paths)
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scope["load_files"] = record_load
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with scope["open_analysis_cache"](files) as (con, tables):
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assert tables == {"report": "report", "report_1": "report_1"}
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assert con.execute("SELECT value FROM report").fetchall() == [(7,)]
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assert con.execute("SELECT value FROM report_1").fetchall() == [(99,)]
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assert loads == [True]
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def test_reader_keeps_old_generation_during_repair(tmp_path, input_file):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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with scope["open_analysis_cache"]([str(input_file)]) as (old, _):
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path, data = manifest(cache)
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data["format"] = 0
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path.write_text(json.dumps(data), encoding="utf-8")
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with scope["open_analysis_cache"]([str(input_file)]) as (new, tables):
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assert new.execute('SELECT value FROM "report"').fetchall() == [(7,)]
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assert tables == {"report": "report"}
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assert old.execute('SELECT value FROM "report"').fetchall() == [(7,)]
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assert old.execute('SELECT value FROM "report"').fetchall() == [(7,)]
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@pytest.mark.parametrize(
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"bad",
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[
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None,
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[],
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{},
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{"format": True},
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{"format": 2},
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{"format": 1, "generation": "../../outside", "table_map": {"report": "report"}},
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],
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)
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def test_invalid_manifest_is_rebuilt(tmp_path, input_file, bad):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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scope["main"]()
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path, _ = manifest(cache)
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path.write_text(json.dumps(bad), encoding="utf-8")
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rebuilt = []
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loader = scope["load_files"]
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scope["load_files"] = lambda con, files: (rebuilt.append(True), loader(con, files))[
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1
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]
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scope["main"]()
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assert rebuilt == [True]
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@pytest.mark.parametrize("damage", ["missing", "truncated"])
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def test_missing_or_corrupt_database_is_rebuilt(tmp_path, input_file, damage):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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scope["main"]()
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_, data = manifest(cache)
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path = cache / "generations-v1" / data["generation"] / "data.duckdb"
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if damage == "missing":
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path.unlink()
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else:
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path.write_bytes(b"not a database")
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scope["main"]()
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with scope["open_analysis_cache"]([str(input_file)]) as (con, _):
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assert con.execute('SELECT value FROM "report"').fetchall() == [(7,)]
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@pytest.mark.parametrize(
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"failure", [RuntimeError("failed"), KeyboardInterrupt(), SystemExit(2)]
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)
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def test_load_interruption_cleans_private_build(tmp_path, input_file, failure):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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loader = scope["load_files"]
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def fail(con, files):
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loader(con, files)
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raise failure
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scope["load_files"] = fail
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with pytest.raises(type(failure)):
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scope["main"]()
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assert list(cache.rglob("*.duckdb")) == []
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assert list(cache.rglob("*.json")) == []
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scope["load_files"] = loader
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scope["main"]()
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@pytest.mark.parametrize(
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("module", "operation"),
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[("tempfile", "mkstemp"), ("json", "dump"), ("os", "fsync")],
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)
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def test_manifest_preparation_failure_cleans_private_generation(
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tmp_path, input_file, monkeypatch, module, operation
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):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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def fail(*args, **kwargs):
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raise OSError(errno.ENOSPC, "manifest preparation ran out of space")
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with monkeypatch.context() as patch:
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patch.setattr(scope[module], operation, fail)
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with pytest.raises(OSError) as error:
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scope["main"]()
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assert error.value.errno == errno.ENOSPC
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assert list((cache / "generations-v1").iterdir()) == []
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with scope["open_analysis_cache"]([str(input_file)]) as (con, _):
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assert con.execute("SELECT value FROM report").fetchall() == [(7,)]
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def test_publication_failure_preserves_prior_manifest(
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tmp_path, input_file, monkeypatch
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):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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scope["main"]()
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path, data = manifest(cache)
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data["format"] = 0 # Force repair, retaining the original publication.
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path.write_text(json.dumps(data), encoding="utf-8")
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before = path.read_bytes()
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original_generations = set(cache.rglob("*.duckdb"))
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def fail(*args):
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raise OSError("publication failed")
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with monkeypatch.context() as patch:
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patch.setattr(scope["os"], "replace", fail)
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with pytest.raises(OSError, match="publication failed"):
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scope["main"]()
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assert path.read_bytes() == before
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assert set(cache.rglob("*.duckdb")) == original_generations
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assert list(cache.rglob("*.tmp")) == []
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scope["main"]()
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def test_failed_replacement_retries_remove_private_generations(tmp_path, input_file):
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cache = tmp_path / "cache"
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scope = configure(cache, input_file)
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root = cache / "generations-v1"
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manifest_path = root / f"{scope['compute_files_hash']([str(input_file)])}.json"
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manifest_path.mkdir(parents=True)
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# A directory at the destination makes the real atomic replacement fail.
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for _ in range(3):
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with pytest.raises(OSError) as error:
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scope["main"]()
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assert Path(error.value.filename2) == manifest_path
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assert list(root.iterdir()) == [manifest_path]
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manifest_path.rmdir()
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with scope["open_analysis_cache"]([str(input_file)]) as (con, _):
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assert con.execute("SELECT value FROM report").fetchall() == [(7,)]
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def test_interrupted_cache_validation_closes_reader(tmp_path, input_file, monkeypatch):
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scope = configure(tmp_path / "cache", input_file)
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scope["main"]()
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connect = duckdb.connect
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opened = []
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class InterruptedConnection:
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def __init__(self, connection):
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self.connection = connection
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def execute(self, *_):
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raise KeyboardInterrupt()
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def close(self):
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self.connection.close()
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def wrapped_connect(*args, **kwargs):
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con = connect(*args, **kwargs)
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opened.append(con)
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return InterruptedConnection(con)
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monkeypatch.setattr(duckdb, "connect", wrapped_connect)
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with pytest.raises(KeyboardInterrupt):
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scope["main"]()
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assert opened
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with pytest.raises(duckdb.ConnectionException):
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opened[0].execute("SELECT 1")
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def test_interruption_after_replace_keeps_published_generation(
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tmp_path, input_file, monkeypatch
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):
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scope = configure(tmp_path / "cache", input_file)
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replace = scope["os"].replace
|
|
|
|
def publish_then_interrupt(*args):
|
|
replace(*args)
|
|
raise KeyboardInterrupt()
|
|
|
|
with monkeypatch.context() as patch:
|
|
patch.setattr(scope["os"], "replace", publish_then_interrupt)
|
|
with pytest.raises(KeyboardInterrupt):
|
|
scope["main"]()
|
|
scope["load_files"] = lambda *_: pytest.fail(
|
|
"a published generation must remain readable"
|
|
)
|
|
with scope["open_analysis_cache"]([str(input_file)]) as (con, _):
|
|
assert con.execute("SELECT value FROM report").fetchall() == [(7,)]
|