InfoQ Homepage Architecture & Design Content on InfoQ
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LinkedIn Re-Architects Service Discovery: Replacing Zookeeper with Kafka and xDS at Scale
LinkedIn's engineering team successfully upgraded its legacy ZooKeeper service discovery platform to enhance scalability and performance. By leveraging Apache Kafka and the xDS protocol, the new architecture enables eventual consistency, supports multiple languages, and allows migration without downtime. Post-upgrade, latency vastly improved, facilitating hundreds of thousands of app instances.
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Java Explores Carrier Classes to Extend Data-Oriented Programming beyond Records
The OpenJDK Amber project has published a new design note proposing “carrier classes” and “carrier interfaces” to extend record-style data modeling to more Java types. The proposal preserves concise state descriptions, derived methods, and pattern matching, while relaxing structural constraints that limit records.
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GitHub Reworks Layered Defenses after Legacy Protections Block Legitimate Traffic
GitHub engineers recently traced user reports of unexpected “Too Many Requests” errors to abuse-mitigation rules that had accidentally remained active long after the incidents that prompted them.
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Airbnb Expands Global Checkout with “Pay as a Local,” Scaling to 220 Markets in 14 Months
Airbnb expands its global checkout with the “Pay as a Local” initiative, supporting over 20 locally preferred payment methods across 220 markets. The company replatformed its payments system with domain-oriented services, reusable flow archetypes, and a centralized configuration, enhancing integration speed, reliability, testing, and observability for diverse payment methods worldwide.
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Cloudflare's Matrix Homeserver Demo Sparks Debate over AI-Generated Code Claims
A Cloudflare blog post claiming a "production-grade" Matrix homeserver on Workers didn't survive community scrutiny. Missing federation, incomplete encryption, and TODO comments in authentication logic pointed to unreviewed AI output. Matrix's Matthew Hodgson welcomed the effort but noted the implementation "doesn't yet constitute a functional Matrix server."
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Java News Roundup: Jakarta EE 12, Spring Shell, Open Liberty, Quarkus, Tomcat, JHipster, Gradle
This week's Java roundup for January 26th, 2026, features news highlighting: an update on milestone and GA release schedule for Jakarta EE 12; the January 2026 edition of Open Liberty; a point release of Quarkus; maintenance releases of Spring Shell, Apache Tomcat and Gradle; and the first and second beta releases of JHipster 9.0.
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Google Introduces Managed Connection Pooling for AlloyDB
Google Cloud has launched managed connection pooling for AlloyDB for PostgreSQL, boosting client connections by 3x and transactional throughput by up to 5x. This feature simplifies database management by automating connection management and reducing latency.
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Uber Moves from Static Limits to Priority-Aware Load Control for Distributed Storage
Uber engineers detailed how they evolved their storage platform from static rate limiting to a priority-aware load management system. The approach protects Docstore and Schemaless, Uber’s MySQL-based distributed databases, by colocating control with storage, prioritizing critical traffic, and dynamically shedding load under overload conditions.
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Google BigQuery Adds SQL-Native Managed Inference for Hugging Face Models
Google has launched SQL-native managed inference for 180,000+ Hugging Face models in BigQuery. The preview release collapses the ML lifecycle into a unified SQL interface, eliminating the need for separate Kubernetes or Vertex AI management. Key features include automated resource governance via endpoint_idle_ttl and secure identity-based execution using existing data warehouse permissions.
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Java News Roundup: Oracle Critical Patch Update, Grizzly 5, Payara Platform, GraalVM, Liberica JDK
This week's Java roundup for January 19th, 2026, features news highlighting: JEP 527, Post-Quantum Hybrid Key Exchange for TLS 1.3, targeted for JDK 27; GlassFish Grizzly 5.0; the quarterly release of the Oracle Critical Patch Update (CPU) Advisory; the January 2026 edition of the Payara Platform; and maintenance releases of Liberica JDK, GraalVM, OpenXava and Ktor.
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Cedar Joins CNCF as a Sandbox Project
Cedar, an open-source policy language architected by AWS, has joined the CNCF as a Sandbox project. Designed for fine-grained application permissions, it decouples access control from code using a verifiable, high-performance policy engine. Cedar supports RBAC, ABAC, and ReBAC, offering a secure, analyzable alternative to general-purpose tools like OPA.
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Spring News Roundup: First Milestone Releases of Boot, Security, Integration, Modulith, AMQP
There was a flurry of activity in the Spring ecosystem during the week of January 19th, 2026, highlighting the first milestone releases of: Spring Boot; Spring Security; Spring Integration; Spring Modulith; and Spring AMQP; along with the second milestone release of Spring AI.
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Enhancing A/B Testing at DoorDash with Multi-Armed Bandits
While experimentation is essential, traditional A/B testing can be excessively slow and expensive, according to DoorDash engineers Caixia Huang and Alex Weinstein. To address these limitations, they adopted a "multi-armed bandits" (MAB) approach to optimize their experiments.
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DoorDash Applies AI to Safety across Chat and Calls, Cutting Incidents by 50%
DoorDash deploys SafeChat, an AI-driven safety system for moderating chat, images, and voice calls between Dashers and customers. Using a layered text moderation architecture, machine learning models, and human review, SafeChat detects unsafe content in real time, enabling immediate actions and reducing low- and medium-severity safety incidents by roughly 50 percent.
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AWS Launches European Sovereign Cloud amid Questions about U.S. Legal Jurisdiction
AWS has launched its European Sovereign Cloud with a €7.8 billion investment, designed to meet EU regulatory demands and address data privacy concerns amid geopolitical tensions. Despite its operational separation from global regions, questions linger about legal protections against U.S. data access. Competitors like Microsoft and local providers may present stronger sovereignty options.