{"record":{"id":"0036fbcadeb99a94","repo":"D4Vinci/Scrapling","slug":"no-pages-finished-to-clear-place-in-the-pool-withi","errorCode":null,"errorMessage":"No pages finished to clear place in the pool within the {self._max_wait_for_page}s timeout period","messagePattern":"No pages finished to clear place in the pool within the (.+?)s timeout period","errorType":"exception","errorClass":"TimeoutError","httpStatus":null,"severity":"error","filePath":"scrapling/engines/_browsers/_base.py","lineNumber":298,"sourceCode":"        blocked_domains: Optional[Set[str]] = None,\n        context: Optional[AsyncBrowserContext] = None,\n    ) -> PageInfo[AsyncPage]:  # pragma: no cover\n        \"\"\"Get a new page to use\"\"\"\n        ctx = context if context is not None else self.context\n        if TYPE_CHECKING:\n            assert ctx is not None, \"Browser context not initialized\"\n\n        async with self._lock:\n            # If we're at max capacity after cleanup, wait for busy pages to finish\n            if context is None and self.page_pool.pages_count >= self.max_pages:\n                # Only applies when using persistent context\n                start_time = time()\n                while time() - start_time < self._max_wait_for_page:\n                    await asyncio_sleep(0.05)\n                    if self.page_pool.pages_count < self.max_pages:\n                        break\n                else:\n                    raise TimeoutError(\n                        f\"No pages finished to clear place in the pool within the {self._max_wait_for_page}s timeout period\"\n                    )\n\n            page = await ctx.new_page()\n            page.set_default_navigation_timeout(timeout)\n            page.set_default_timeout(timeout)\n            if extra_headers:\n                await page.set_extra_http_headers(extra_headers)\n\n            if disable_resources or blocked_domains:\n                await page.route(\"**/*\", create_async_intercept_handler(disable_resources, blocked_domains))\n\n            return self.page_pool.add_page(page)\n\n    def get_pool_stats(self) -> Dict[str, int]:\n        \"\"\"Get statistics about the current page pool\"\"\"\n        return {\n            \"total_pages\": self.page_pool.pages_count,","sourceCodeStart":280,"sourceCodeEnd":316,"githubUrl":"https://github.com/D4Vinci/Scrapling/blob/5d213a2d4764002bfc4fed33c32fe09fa8b0bf7f/scrapling/engines/_browsers/_base.py#L280-L316","documentation":"Raised in `_get_page` of the sync browser engine base (scrapling/engines/_browsers/_base.py:298). With a persistent browser context, pages are pooled up to `max_pages`; when the pool is full, this code waits (polling every 50ms) up to `_max_wait_for_page` (hardcoded 60s) for a busy page to finish and be released. If none frees up in time, a `TimeoutError` is raised because `ctx.new_page()` would otherwise exceed the cap.","triggerScenarios":"Creating more concurrent fetches/tasks inside one `with DynamicSession(max_pages=N)` block than `N`, where all pages stay busy longer than 60s — e.g. N threads each doing slow `fetch()` calls with high `timeout`, long `wait`, or blocked `page_action` callbacks. Only applies when no explicit proxy context is used (persistent-context path).","commonSituations":"Scaling up a thread pool beyond the configured `max_pages`; long `network_idle`/`wait_selector` waits holding pages; a `page_action` that sleeps or waits on user input while holding a pooled page; CI environments where pages hang on bad proxies.","solutions":["Raise `max_pages` when constructing the session so it matches your concurrency: `DynamicSession(max_pages=n_workers)`.","Reduce per-page hold time: lower `timeout`, avoid `network_idle` on slow sites, keep `page_action` short.","Cap caller concurrency (semaphore/queue) at or below `max_pages`.","Catch `TimeoutError` around `fetch()` and reschedule that URL instead of letting it kill the batch."],"exampleFix":"# before\nwith DynamicSession(max_pages=2) as s:\n    with ThreadPoolExecutor(20) as pool:  # 20 fetches, 2 pages -> TimeoutError\n        list(pool.map(lambda u: s.fetch(u), urls))\n\n# after\nwith DynamicSession(max_pages=20) as s:\n    with ThreadPoolExecutor(20) as pool:\n        list(pool.map(lambda u: s.fetch(u), urls))","handlingStrategy":"retry","validationCode":"def pool_has_room(session, needed: int = 1) -> bool:\n    return session.page_pool.pages_count + needed <= session.max_pages","typeGuard":null,"tryCatchPattern":"from time import sleep\nfor attempt in range(3):\n    try:\n        resp = session.fetch(url)\n        break\n    except TimeoutError as e:\n        if 'pool' not in str(e):\n            raise\n        sleep(5)  # let busy pages finish, then retry\nelse:\n    raise","preventionTips":["Set max_pages >= your worker count when creating the session.","Keep page_action callbacks short; they hold pooled pages.","Bound concurrency with a semaphore equal to max_pages."],"tags":["browser","page-pool","timeout","concurrency","scrapling"],"backgroundTag":null,"analyzedSha":"5d213a2d4764002bfc4fed33c32fe09fa8b0bf7f","analyzedAt":"2026-08-14T22:23:09.440Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}