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Oct 20, 2026 · Backend Development

Tomcat 11 Deep Dive: Virtual Threads, Servlet 6.1, EL 6.0, and Migration Guide

This article explores Tomcat 11's major upgrades including Java 17 baseline, Jakarta EE 11 alignment, virtual threads for high concurrency, Servlet 6.1 API improvements, EL 6.0 record support, removed legacy features, and provides hands-on Docker and embedded deployment examples with code.