Error in the HTTP2 framing layer solution


Once in a while I got this error when connecting to an external service on servers running Ubuntu 18.x or 20.x. After some research I got this flaky bug resolved!

Published on September 4, 2023 · 1 minute read

  1. Root cause of the error
  2. Solution
  3. How to upgrade curl manually

Root cause of the error

We have a lot of servers running on Digitalocean that sends email using an email service provider like Postmark or Mailgun. And once in every 4-5 emails that were send, I got this error message stating the error "Error in the HTTP2 framing layer solution" following the URL of the API it was connecting to.

At first I thought the problem was on the API service I was using, because of a drop in the SSL connection or something.

But after some research online, it wasn't a third party problem. But a problem on the server itself, and specifically a bug in the version of curl available in the APT repositories of Ubuntu.


The solution was to upgrade curl to the newest possible version. Because this new version is not offered through APT, we need to do it manually.

How to upgrade curl manually

Here's to install the latest curl version (v8.2.1) at the time of writing this article.

# Remove installed curl version
apt remove curl -y
apt purge curl -y

# Install libs and compile tooling
apt-get update
apt-get install -y libssl-dev autoconf libtool makez

# Download new curl version, unzip, configure and compile build
cd /usr/local/src
cd /usr/local/src/curl-8.2.1
autoreconf -fi
./configure --with-ssl
make install

# Install curl globally
mv /usr/local/src/curl-8.2.1/src/.libs/curl /usr/local/bin/curl
sudo ldconfig

When done, make sure you restart the services using curl on the server so it will use this new version.

Subscribe to our newsletter

Do you want to receive regular updates with fresh and exclusive content to learn more about web development, hosting, security and performance? Subscribe now!