Migrating From Adobe ColdFusion to Lucee: Code Compatibility, Pitfalls, and Wins

Migrating a ColdFusion application from Adobe ColdFusion to Lucee is realistic — both run CFML on the JVM and share most of the same language, so most well-written code moves with modest effort — but it’s not a zero-change port, and treating it as one is how migrations go wrong. Lucee is broadly compatible with Adobe ColdFusion, and Lucee’s own team tracks the known differences under an acf-compat label, but there are real gaps to plan for: features Lucee unbundles into optional extensions (Hibernate ORM, cfchart, cfsearch/Lucene, FORM, AXIS web services, AJAX, EHCache — you install these on Lucee, Adobe bundles them), behavior differences (Lucee 6's cfqueryparam no longer autocasts empty values to null; string member functions changed to match Adobe), and Adobe-specific/deprecated features (Flash Remoting, certain Adobe-only tags/services) that need replacing. The wins are equally real: zero licensing cost (no $760/$2,930-per-year subscription), a lighter, faster-starting, container-friendly engine with JSON configuration (.CFConfig.json), and a fast community release cadence. The path is a staged migration: audit → set up Lucee → run your test suite → fix compatibility gaps → benchmark → cut over. This guide covers the compatibility reality, the specific pitfalls, and the wins.
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