eclipse import broken

[nik9000]

Importing Elasticsearch into eclipse fails as of sometime this morning I think. The error message can be reproduced without eclipse with:

$ ./gradlew tasks
Directory '/usr/lib/jvm/java-13-openjdk' (environment variable 'JAVA13_HOME') used for java installations does not exist
=======================================
Elasticsearch Build Hamster says Hello!
  Gradle Version        : 7.1.1
  OS Info               : Linux 5.12.10-arch1-1 (amd64)
  JDK Version           : 16.0.1 (Oracle)
  JAVA_HOME             : /home/nik9000/Bin/jdk-16.0.1
  Random Testing Seed   : 68EFFB12606AAA97
  In FIPS 140 mode      : false
=======================================
> Task :tasks FAILED

FAILURE: Build failed with an exception.

* Where:
Build file '/home/nik9000/Code/Elastic/elasticsearch/modules/lang-painless/build.gradle' line: 66

* What went wrong:
Execution failed for task ':tasks'.
> Could not create task ':modules:lang-painless:apiJavadoc'.
   > Could not get unknown property 'classpath' for configuration ':modules:lang-painless:spi' of type org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.

[elasticmachine]

Pinging @elastic/es-delivery (Team:Delivery)

[nik9000]

This looks to have been caused by #76288. Reverting to just before that commit seems to fix it.

[nik9000]

@rjernst I think modules:lang-painless:apiJavadoc is broken - the task doesn't properly configure itself any more. Do you think it'd be useful to run that task when we build painless?

[rjernst]

@nik9000 We run it as part of assemble.
@mark-vieira Does assemble not run with CI?