toolchain_hostjdk8 breaks in bazel 0.21: passing -Xbootclasspath/p to java9

[asuffield]

Description of the problem / feature request:

--java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8 no longer works in bazel 0.21. The javac workers fail to start with:

---8<---8<--- Start of log ---8<---8<---
-Xbootclasspath/p is no longer a supported option.
ion.
---8<---8<--- End of log ---8<---8<---

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

git clone https://github.com/bazelbuild/examples/
cd examples
bazel build //:ProjectRunner --java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8

What's the output of bazel info release?

release 0.21.0

What I've figured out so far: this combination tries to run the remotejdk (zulu java 9) with JDK8_JVM_OPTS, which are not accepted by the new jvm.

[cushon]

Are you setting a --host_javabase? --java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8 only works if you explicitly configure a JDK 8 host javabase.

Does your build work if you remove the --java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8 flag and use the default toolchain?

[asuffield]

Ah, that would explain why it fails. Yes, the default toolchain is fine.

So we can call this one an incomprehensible error message for an invalid combination of options, and see if there's some way to report the actual problem.

[lberki]

Yeah, that's a pretty accurate description. Marking this P3 because this is "just" an error message issue.

[perezd]

So I'm seeing this as well if I do the following in my bazelrc:

common --define=ABSOLUTE_JAVABASE=/usr/lib/jvm/java-11-openjdk-amd64 \
       --javabase=@bazel_tools//tools/jdk:absolute_javabase \
       --host_javabase=@bazel_tools//tools/jdk:absolute_javabase \
       --java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla \
       --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla

Following along here: #5723
I am trying to run my existing bazel project using host jdk11 (ubuntu)

Bazel version 0.25.3 here

[sgowroji]

Hi there! We're doing a clean up of old issues and will be closing this one. Please reopen if you’d like to discuss anything further. We’ll respond as soon as we have the bandwidth/resources to do so.