RFR: 8325567: jspawnhelper without args fails with segfault

[Vladimir Petko]

On Fri, 1 Mar 2024 07:37:22 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> Would it be possible to expand a bit on what is going on here? Are you saying that in the course of upgrading a JDK that you somehow get into a state where jspawnhelper has been replaced with a version from a newer JDK? Is the real issue here that the upgrade didn't shutdown the application and/or something copied over an existing installation during the upgrade?

It appears that answer is yes (in Debian and Ubuntu) if the machine is running unattended-upgrades service and openjdk is not blacklisted from upgrades. 
I believe we should blacklist openjdk packages by default to avoid this situation.

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PR Comment: https://git.openjdk.org/jdk/pull/18074#issuecomment-1977331977