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NextJS / vercel - 504 Error 'FUNCTION_INVOCATION_TIMEOUT'

Getting this error on one of my pages after deploying to vercel, it all works fine in dev mode.

I think the problem might be one of my fetch/APIs since it uses the data from the first fetch request as the URL for the second fetch request...

All of my other pages with different APIs / fetch requests work fine...

export const fetchData = async (page) => {
  try {
    const req = await fetch(
      "https://www.productpage.com/new/" +
        page
    );
    const html = await req.text();
    const $ = cheerio.load(html);

    let newProducts = [];

    for (let i = 1; i < 25; i++) {
      let name = $(`#product_listing > tbody > #_${i} > td:nth-child(2) > a`)
        .text()
        .replace(/\n/g, "");
      let pageSrc = $(
        `#product_listing > tbody > #_${i} > td:nth-child(2) > a`
      ).attr("href");
      const price = $(`#product_listing > tbody >#_${i} > td.price.notranslate`)
        .text()
        .replace(/\n/g, "");

      pageSrc = "https://www.productpage.com" + pageSrc;

      const req2 = await fetch(pageSrc); // here it is using data from first fetch for a 2nd request..
      const html2 = await req2.text();
      const $2 = cheerio.load(html2);

      const imageSrc = $2(
        "#product-main-image .main-image-inner:first-child img"
      ).attr("src");
      const name2 = $2("#product-details dd:nth-child(2)")
        .text()
        .replace(/\n/g, "");
      const brand = $2("#product-details dd:nth-child(4)")
        .text()
        .replace(/\n/g, "");

      newProducts.push({
        name: name,
        name2: name2,
        brand: brand,
        pageSrc: pageSrc,
        price: price,
        imageSrc: imageSrc,
      });
    }

    return newProducts;
  } catch (err) {}
};

module.exports = {
  fetchData,
};
about 4 years ago · Juan Pablo Isaza
1 answers
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0

This error suggests that the API response is taking too long to respond.

When using Vercel with a Hobby plan, your serverless API routes can only be processed for 5 seconds. This means that after 5 seconds, the route responds with a 504 GATEWAY TIMEOUT error.

These same limits do not apply when running locally with next dev.

To resolve this, you would need to reduce the amount of time your API route takes to respond, or upgrade your Vercel plan.

about 4 years ago · Juan Pablo Isaza Report
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