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Heroku Blog

Latency Incident Report: Socket Bind Before Connect

Back on August 11, 2016, Heroku experienced increased routing latency in the EU region of the common runtime. While the official follow-up report describes what happened and what we’ve done to avoid this in the future, we found the root cause to be puzzling enough to require a deep dive into Linux networking.

The following is a write-up by SRE member Lex Neva (what’s SRE?) and routing engineer Fred Hebert (now Heroku alumni) …

N+1 Queries or Memory Problems: Why not Solve Both?

This post is going to help save you money if you're running a Rails server. It starts like this: you write an app. Let's say you're building the next hyper-targeted blogging platform for medium length posts. When you login, you see a paginated list of all of the articles you've written. You have a Post model and maybe for to do tags, you have a Tag model, and for comments, you have a Comment model. …

Announcing Free and Automated SSL Certs For All Paid Dynos

We are happy to announce the general availability of Automated Certificate Management (ACM) for all paid Heroku dynos. With ACM, the cumbersome and costly process of provisioning and managing SSL certificates is replaced with a simple experience that is free for all paid Dynos on Heroku’s Common Runtime. Creating secure web applications has never been more important, and with ACM and the Let’s Encrypt project, never easier.

ACM handles all aspects of SSL/TLS certificates …

Introducing the Einstein Vision Add-on for Image Recognition

UPDATE: As of July 31, 2023, Salesforce no longer offers the Object Detection and Image Classification APIs. This means those APIs are no longer available. As a result, the demo app and the Einstein Vision add-on are no longer available.

The most innovative apps augment our human senses, intuition, and logic with machine learning. Deep learning, modelled after the neural networks of the human brain, continues to grow as one of the most powerful types of machine learning. When applied to images, deep learning enables powerful computer vision features like visual search, product identification, and brand detection.

Today, we bring you the Einstein Vision add-on (beta), allowing Heroku developers to easily connect to and use Einstein Vision, a set of powerful new APIs for building AI-powered apps. With this release, Salesforce is making it easy for you to embed image recognition directly into your apps. Rather than building and managing the specialized infrastructure needed to host deep learning models, simply connect to Einstein Vision’s HTTP/REST API for custom image recognition with little development overhead.

Yarn: Lock It in for Deterministic Dependency Resolution

Choices are an important part of a healthy open source software community. That’s why we’re excited about Yarn, a new package manager that addresses many of the problems with Node’s default package manager, npm. While npm has done a fantastic job creating a large and vibrant JavaScript ecosystem, I want to share why Yarn is an important addition to the Node.js ecosystem, how it will improve your Node.js development experience, and how Heroku has …

Bundler Changed Where Your Canonical Ruby Information Lives: What to Know

Heroku bumped its Bundler version to 1.13.7 almost a month ago, and since then we’ve had a large number of support tickets opened, many a variant of the following:

Your Ruby version is <X>, but your Gemfile specified <Y>

I wanted to talk about why you might get this error while deploying to Heroku, and what you can do about it, along with some bonus features provided by the new Bundler version.

Why?

First off, …

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