Just cloned the repository from GH (commit e5251bc5a0d5382c64e3751953e4f38fb67633e1) and the build fails with the above mentioned error.
I am on Debian testing amd64.
The command and output is
$ ./gradlew assemble
=======================================
Elasticsearch Build Hamster says Hello!
Gradle Version : 7.2
OS Info : Linux 5.14.0-3-amd64 (amd64)
JDK Version : 17 (Debian)
JAVA_HOME : /usr/lib/jvm/java-17-openjdk-amd64
Random Testing Seed : 98D21BFAFF9F2E99
In FIPS 140 mode : false
=======================================
FAILURE: Build failed with an exception.
* What went wrong:
Invalid version format: '20.10.8+dfsg1'. Should be major.minor.revision[-extra]
* 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.
* Get more help at https://help.gradle.org
BUILD FAILED in 52s
19 actionable tasks: 19 up-to-date
The version number complaint refers to the docker package:
$ dpkg -l |grep '20.10.8'
ii docker.io 20.10.8+dfsg1-1 amd64 Linux container runtime
What do you suggest to get Elasticsearch building ?