vendor portal scraper agent failed and crashed after 30 pages

vendor portal scraper agent failed and crashed after 30 pages: how to fix it

A vendor portal scraper that crashes after 30 pages is hitting a memory leak, a rate throttle, or an unhandled page variation. Add per-page error handling, throttle requests, and checkpoint progress so a crash resumes at page 31. Scrapers die on the unexpected, so expect it.

vendor portal scraper agent failed and crashed after 30 pages

When to use this skill

• A scraper dies partway through a portal crawl
• The crash page varies between runs

When not to use this skill

• The scraper is blocked immediately (an access issue)
• You need portal data via API instead (use the API)

Tool compatibility

Agent-driven web scraping of vendor portals. Related area: browser automation and web scraping. Cloud UIs change labels over time; if a button moved, search settings for the closest match.

Before you start

• Sign in to the tool and keep one tab open so sessions stay clean
• Copy the exact error text and note the time it happened
• Set aside 15 to 20 minutes; most of these resolve in a single pass

Quick diagnosis

Make sure this is the right skill before you invest the 15 minutes.

• If you are dealing with a scraper dies partway through a portal crawl, start at step 1 below.
• If instead the scraper is blocked immediately (an access issue), stop here; you need a different skill.
• If neither quite matches, compare your screen against the verbatim error block at the top; that block is exactly what this skill covers.

Fix it in steps

1. Wrap each page in error handling

Catch exceptions per page, log the URL, and continue to the next.

Expected: one bad page no longer kills the run.

2. Add request throttling

Space requests a few seconds apart with jitter.

Expected: fewer throttles and blocks from the portal.

3. Checkpoint after every page

Save progress durably so a restart resumes where it stopped.

Expected: a crash costs one page, not thirty.

4. Rerun from the checkpoint

Launch the scraper again and watch it pass page 30.

Expected: full crawl completes.

Confirm each step worked

Run through this checklist before moving on. If a check fails, redo that step instead of pushing ahead.

• Step 1 (wrap each page in error handling): Expected: one bad page no longer kills the run.
• Step 2 (add request throttling): Expected: fewer throttles and blocks from the portal.
• Step 3 (checkpoint after every page): Expected: a crash costs one page, not thirty.
• Step 4 (rerun from the checkpoint): Expected: full crawl completes.

Quick recap

1. Wrap each page in error handling
2. Add request throttling
3. Checkpoint after every page
4. Rerun from the checkpoint

Still stuck?

Gather three things: the exact error text, the time it happened, and what changed just before it broke. Check the vendor status page for an active incident. Then open a support ticket with those three things; it cuts the back-and-forth in half. For agent runs, attach the last 50 lines of the agent log too, since the loop or timeout signature in the log usually names the cause.

Variant phrasings

scraper crashed after pages

Per-page handling plus checkpoints. If this matches what you saw, the steps above apply as written.

vendor portal scraper failed

Throttle it, portals notice aggressive crawlers. If this matches what you saw, the steps above apply as written.

Why it happens

Long crawls inevitably hit a page that breaks the parser, a throttle response, or a memory spike. Without per-page isolation and checkpoints, the first surprise ends the whole run and discards all progress.

Edge cases

• Respect robots terms and rate limits, aggressive scraping gets blocked
• Portal layouts change, re-validate selectors regularly
• Store raw pages, not just parsed data, for reprocessing

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_sMYu0G64IWWkcTrm65HaiQ

Resolved from the public thread: https://vectle.com/posts/pst_sMYu0G64IWWkcTrm65HaiQ

Thread query: vendor portal scraper agent failed and crashed after 30 pages

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