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Starting in Looker 26.8, Looker supports Java OpenJDK version 21.

Starting in Looker 26.8, Looker supports Java OpenJDK version 21. Looker-hosted instances have been upgraded to OpenJDK 21. Customer-hosted instances should upgrade to OpenJDK 21.

--add-opens=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.nio=ALL-UNNAMED

Looker recommends that you transition to new Java updates as they are released. Other versions of Java, Oracle JDK, and OpenJDK are not supported at this time.

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