A bug was reported recently that an OpenJDK build was built with closed src. This problem has been fixed by infra: https://bugs.openjdk.java.net/browse/JDK-8191940.

This is a request to add automated tests against the release file to check for existence of closed src file in OpenJDK build. We should catch this problem before the build is published externally.

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I downloaded
http://download.java.net/java/GA/jdk9/9.0.1/binaries/openjdk-9.0.1_linux-x64_bin.tar.gz
and was surprised to see in the release file

SOURCE="hotspot/test/closed:316354408df5 hotspot/src/closed:652d2b48abaa
hotspot:5be37d3ef648 hotspot/make/closed:519cacafd927
langtools:886cca9014ae jdk:fa3b1c07db05 jdk/test/closed:a17e208630cb
jdk/make/closed:9ffe7c6d8c81 jdk/src/closed:3912bb1ca902
jaxp:04e8b60cb228 corba:0876f7e30c48 nashorn:8793d38f6b7a
deploy:9a01a3528fcd install:1b2575cc45dc jaxws:dd3fd1a7a076
sponsors:c60e20219ed4 closed:4b57761cc132 .:3a64fdb24a8c"

which suggests it was built from closed sources, contrary to the intent
of that release.