The one that comes default on Debian Stretch. "mvn --version" says 3.3.9:
$ mvn --version Apache Maven 3.3.9 Maven home: /usr/share/maven Java version: 9-Debian, vendor: Oracle Corporation Java home: /usr/lib/jvm/java-9-openjdk-amd64 Default locale: ru_RU, platform encoding: UTF-8 OS name: "linux", version: "4.15.18-1-pve", arch: "amd64", family: "unix" пн, 15 окт. 2018 г., 8:28 Mike Jumper <[email protected]>: > On Thu, Oct 11, 2018 at 11:52 AM, Mike Jumper <[email protected]> wrote: > > > On Thu, Oct 11, 2018, 11:23 Vasily <[email protected]> wrote: > > > >> I've first tried with openjdk-9-jdk, then "apt remove"d it after first > >> seeing this error and installed 8-jdk instead. > >> > >> What is the required version of jdk anyway? > >> > > > > For building master, anything from JDK 8 and later, theoretically, > > notwithstanding build tool bugs. > > > > The Guacamole source and build requires Java 8 as of GUACAMOLE-635, which > > will affect the in-progress 1.0.0 release and onward. This will be noted > in > > the release notes when 1.0.0 goes out: > > > > https://issues.apache.org/jira/browse/GUACAMOLE-635 > > > > It's possible that some sort of workaround will need to be put in place > if > > this affects the build even under JDK 8. This isn't happening in CI, but > we > > also don't use Debian in our CI build. > > > > For 0.9.14 and older, the build requires Java 7 or later, however the > > source and resulting binaries are compatible with Java 6 or higher. > > > > > Vasily, regarding the build failure, any idea what version of Maven you're > using? > > - Mike >
