Cannot compile v17 to java8 target due to caffeine 3.1.8 requires java11

[hudejo]

Execution failed for task ':compileJava'.

Could not resolve all files for configuration ':compileClasspath'. Could not resolve com.github.ben-manes.caffeine:caffeine:3.1.8. Required by: project : No matching variant of com.github.ben-manes.caffeine:caffeine:3.1.8 was found. The consumer was configured to find an API of a library compatible with Java 8, preferably in the form of class files, preferably optimized for standard JVMs, and its dependencies declared externally but:

• Variant 'apiElements' capability com.github.ben-manes.caffeine:caffeine:3.1.8 declares an API of a library, packaged as a jar, and its dependencies declared externally:
• Incompatible because this component declares a component compatible with Java 11 and the consumer needed a component compatible with Java 8
• Other compatible attribute:
• Doesn't say anything about its target Java environment (preferred optimized for standard JVMs)
• Variant 'javadocElements' capability com.github.ben-manes.caffeine:caffeine:3.1.8 declares a runtime of a component, and its dependencies declared externally:
• Incompatible because this component declares documentation and the consumer needed a library
• Other compatible attributes:
• Doesn't say anything about its target Java environment (preferred optimized for standard JVMs)
• Doesn't say anything about its target Java version (required compatibility with Java 8)
• Doesn't say anything about its elements (required them preferably in the form of class files)
• Variant 'runtimeElements' capability com.github.ben-manes.caffeine:caffeine:3.1.8 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
• Incompatible because this component declares a component compatible with Java 11 and the consumer needed a component compatible with Java 8
• Other compatible attribute:
• Doesn't say anything about its target Java environment (preferred optimized for standard JVMs)
• Variant 'sourcesElements' capability com.github.ben-manes.caffeine:caffeine:3.1.8 declares a runtime of a component, and its dependencies declared externally:
• Incompatible because this component declares documentation and the consumer needed a library
• Other compatible attributes:
• Doesn't say anything about its target Java environment (preferred optimized for standard JVMs)
• Doesn't say anything about its target Java version (required compatibility with Java 8)
• Doesn't say anything about its elements (required them preferably in the form of class files)

• Try:

  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

[hudejo]

by ben-manes: 2.x supports java8, 3.x requires java11: https://github.com/ben-manes/caffeine/issues/514#issuecomment-797591842

[hudejo]

Next error; solr 9.x also requires java11, so I give up to compile v17 with java8 :-(

[gWestenberger]

We only updated the dependencies after the tag build_17_0_0, you should be able to build the tagged revision with Java 8.