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Java 27 Makes G1 the Default Everywhere: How to Test Your Small Containers Before You Upgrade

By Garima Agarwal 0 views 0 comments
Java 27 Makes G1 the Default Everywhere: How to Test Your Small Containers Before You Upgrade
Image: DZone

When JDK 27 was released on 15 September 2026, most of the attention went to compact object headers and post-quantum TLS. JEP 523 received less coverage, partly because its description sounds like housekeeping: G1 becomes the default garbage collector in all environments.

For most applications, that changes nothing. For a specific class of container, it changes the collector silently, with no warning in the logs and no failure at startup.

DZone Original story · dzone.com
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