chore: Use Java 21 for building JMeter #6125
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Description
Java 21 has been released some time ago, so we can use it as the default build JDK.
Motivation and Context
We want to use the recent
javac
to avoid bugs in the old compilers.Java 21 supports
--release 8
, so we would still support running with Java 8.TODO
jmeter/.github/workflows/main.yml
Lines 58 to 62 in 3c6cacb