Started happening in https://ci.chromium.org/p/chrome/builders/luci.chrome.ci/android_arm64-builder-perf/26734


/b/s/w/ir/cache/builder/src/buildtools/linux64/gn gen //out/Release --check --runtime-deps-list-file=/b/s/w/ir/cache/builder/src/out/Release/runtime_deps
  -> returned 1
ERROR Unresolved dependencies.
//clank/java:clank_java(//build/toolchain/android:android_clang_arm64)
  needs //third_party/protobuf:protobuf_lite_javalib(//build/toolchain/android:android_clang_arm64)
//clank/java:clank_java__build_config(//build/toolchain/android:android_clang_arm64)
  needs //third_party/protobuf:protobuf_lite_javalib__build_config(//build/toolchain/android:android_clang_arm64)
//clank/java:clank_java__compile_java(//build/toolchain/android:android_clang_arm64)
  needs //third_party/protobuf:protobuf_lite_javalib(//build/toolchain/android:android_clang_arm64)
//clank/java:clank_java__compile_java_errorprone(//build/toolchain/android:android_clang_arm64)
  needs //third_party/protobuf:protobuf_lite_javalib(//build/toolchain/android:android_clang_arm64)
//clank/java:clank_java__lint(//build/toolchain/android:android_clang_arm64)
  needs //third_party/protobuf:protobuf_lite_javalib(//build/toolchain/android:android_clang_arm64)

GN gen failed: 1

mheikal: looks like https://chromium-review.googlesource.com/c/chromium/src/+/1340522 given that it's the only revision for that build; reverting.

...and while the revert was in flight, the build turned green again. Then the revert landed, and broke it again (during the compile step, not the gn step).

Unsure what's going on here? I just relanded the change, let's see what happens.

I know what is going on here. I may have needed to inform more people (I informed clank sheriff, but I realize now that I broke a lot of bots not just clankium TOT). 

The reason things broke was because of a change that needed to be done in both repos, to move to the new protobuf java runtime. The portion of the cl that was to be in the clank repo was delayed. I eventually forced it through but it takes some time for the bots to finish a new build and turn green again.

Looking back there may have been a way to not break the bots by making the old library gn target an alias of the new one. I did not realize how many things would break because of this. Either way, I will endeavor to inform all relevant sheriffs next time.

I am closing the bug since the issue should be fixed now.

Thanks! Yep it's all green since the reland.