jlink fails with "Hash of java.xyz differs to expected hash recorded in java.base"

[Sebastian Stenzel]

> Am 31.03.2020 um 09:47:25 schrieb Alan Bateman <Alan.Bateman at oracle.com>:
> 
> On 31/03/2020 08:18, Sebastian Stenzel wrote:
>> Hi all,
>> 
>> not sure if this is the right mailing list to ask about this, but I found some previous mails in the archive that suggested it.
>> 
>> I noticed that whenever I use OpenJDK 11 - 14 on Ubuntu from the distro's official package repo, jlink always fails with messages like these:
>> 
>>     Hash of java.xml (c043b4c28b897656e2a4d36c92ba2f5d52134bce79643236dd36295e14178be7) differs to expected hash (4e7db7fc941d9f316c4aafe02717b5809ee722be8433d283050365e7fd49331f) recorded in java.base
>> 
>> 
> The hashes of the standard and JDK modules are stored in the java.base module to prevent accidental mismatch at link time. In this case it suggests that java.base and java.xml came from different builds or maybe the Ubuntu is doing stripping or other modifications to the packaged modules. I did a quick search and it looks like it has been noticed by others too [1]
> 
> -Alan
> 
> [1] https://bugs.launchpad.net/ubuntu/+source/openjdk-14/+bug/1868699

This was my bug report, that's why I'm investigating to give the Ubuntu guys some tips on how they can solve it (if they caused it in the first place). ;-)