openjdk9 builds failing on macos

[sxa]

Ref: https://ci.adoptopenjdk.net/job/openjdk9_build_x86-64_macos/
Builds appear to succeed on build-macstadium-macos1010-1 and fail on build-macstadium-macos1010-2.

Creating support/modules_libs/java.base/server/libjvm.dylib from 689 file(s)
Creating hotspot/variant-server/libjvm/gtest/libjvm.dylib from 52 file(s)
Creating hotspot/variant-server/libjvm/gtest/gtestLauncher from 1 file(s)
fatal error: malformed or corrupted AST file: 'could not find file '/Users/jenkins/workspace/openjdk_build-refactor/workspace/build/src/hotspot/make/../src/share/vm/gc/shared/plab.hpp' referenced by AST file'
1 error generated.
fatal error: malformed or corrupted AST file: 'could not find file '/Users/jenkins/workspace/openjdk_build-refactor/workspace/build/src/hotspot/make/../src/share/vm/gc/shared/plab.hpp' referenced by AST file'
1 error generated.
make[3]: *** [/Users/jenkins/workspace/openjdk9_build_x86-64_macos/openjdk/build/macosx-x86_64-normal-server-release/hotspot/variant-server/libjvm/gtest/objs/logTestFixture.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: *** [/Users/jenkins/workspace/openjdk9_build_x86-64_macos/openjdk/build/macosx-x86_64-normal-server-release/hotspot/variant-server/libjvm/gtest/objs/test_AltHashing.o] Error 1
fatal error: malformed or corrupted AST file: 'could not find file '/Users/jenkins/workspace/openjdk_build-refactor/workspace/build/src/hotspot/make/../src/share/vm/gc/shared/plab.hpp' referenced by AST file'
1 error generated.
make[3]: *** [/Users/jenkins/workspace/openjdk9_build_x86-64_macos/openjdk/build/macosx-x86_64-normal-server-release/hotspot/variant-server/libjvm/gtest/objs/test_arguments.o] Error 1
fatal error: malformed or corrupted AST file: 'could not find file '/Users/jenkins/workspace/openjdk_build-refactor/workspace/build/src/hotspot/make/../src/share/vm/gc/shared/plab.hpp' referenced by AST file'
1 error generated.
make[3]: *** [/Users/jenkins/workspace/openjdk9_build_x86-64_macos/openjdk/build/macosx-x86_64-normal-server-release/hotspot/variant-server/libjvm/gtest/objs/test_arrayOop.o] Error 1
fatal error: malformed or corrupted AST file: 'could not find file '/Users/jenkins/workspace/openjdk_build-refactor/workspace/build/src/hotspot/make/../src/share/vm/gc/shared/plab.hpp' referenced by AST file'
1 error generated.
make[3]: *** [/Users/jenkins/workspace/openjdk9_build_x86-64_macos/openjdk/build/macosx-x86_64-normal-server-release/hotspot/variant-server/libjvm/gtest/objs/test_bitMap.o] Error 1
fatal error: malformed or corrupted AST file: 'could not find file '/Users/jenkins/workspace/openjdk_build-refactor/workspace/build/src/hotspot/make/../src/share/vm/gc/shared/plab.hpp' referenced by AST file'
1 error generated.

[sxa]

Have cleared out the workspace on that machine and will attempt a re-run to see if that's enough to clear the problem

[sxa]

Didn't work ... Manually deleting workspace on the machine and retrying

[sxa]

Confirmed that it is on -1 - https://ci.adoptopenjdk.net/job/openjdk9_build_x86-64_macos/208 passed

[sxa]

Need to understand what the openjdk_build-refactor directory is for and why the builds are referencing it - it doesn't exist on -2

[sxa]

Tactical fix implemented until @johnoliver returns from vacation - I have copied the /Users/jenkins/workspace/openjdk_build-refactor directory from build-macstadium-macos1010-1 to build-macstadium-macos1010-2 so the files it's looking for are present.

[sxa]

Removed important tag as we're now unblocked after the actions in my previous comment

[karianna]

This is fixed in the new build scripts, keeping open until we cut over.

[sxa]

This specific problem appears to have disappeared although #354 still exists (but is understood to be fixed in the new scripts)