TEST build OK: openjdk8.spec - openjdk 8 and 9 hangs on glibc 2.34 in vserver guest

[Jan Palus]

On 24.11.2021 19:55, Arkadiusz Miśkiewicz via pld-devel-en wrote:
> W dniu 24.11.2021 o 14:00, Arkadiusz Miśkiewicz pisze:
> > W dniu 22.10.2021 o 11:37, Jan Palus pisze:
> >> On 22.10.2021 10:44, Jan Rękorajski wrote:
> >>> Ah, it wasn't icedtea but openjdk8 that was installed on i686 and x86_64.
> >>> I'm uninstalling it and blocking in poldek on builders so that we have
> >>> only openjdk11 installable there.
> >>
> >> Currently openjdk8 requires either JDK 1.7 or 1.8 for build, I guess we
> >> can patch it and try to build with openjdk11, no guarantees it would
> >> work though. Not sure what is the difference but I had no issues
> >> building openjdk8 1.8.0.312 with openjdk8 1.8.0.302 and glibc 2.34 on
> >> x86_64, aarch64 and armv7hnl. I'll try to reproduce in fresh VM.
> > 
> > For me our openjdk8 from ftp hangs on just doing "java -version". Not
> > always. Sometimes I need to run that 5-10 times but I do get the hang
> > easily. kernel 4.9.194, glibc 2.34, x86_64, vserver guest
> > 
> > while (true); do date; java -version; done
> > 
> > openjdk version "1.8.0_302-ga"
> > OpenJDK Runtime Environment (build 1.8.0_302-ga-1)
> > OpenJDK 64-Bit Server VM (build 25.302-b1, mixed mode)
> > 
> > Build Date  : pon, 2 sie 2021, 16:46:33
> 
> More fun with that.
> 
> working system, glibc 2.34, on any kernel
> 
> mkdir /test/
> rsync -avPH / /test/ --exclude /test/ --exclude /proc --exclude /sys
> mount /proc /test/proc -o bind
> chroot /test/; java -version - hangs at some retry
> 
> mkdir -p /test/sys/devices/system/cpu
> chroot /test/; java -version - no hangs
> (so proc is mounted but /sys is not; just dir exists)

Great finding! Indeed the following is a quick reproducer for any java8
version -- openjdk8 302/312, icedtea8 and even Oracle JDK8 202:

systemd-run --wait -t -p InaccessiblePaths=/sys /usr/lib64/jvm/openjdk8/bin/java -version

So far couldn't reproduce with openjdk11 and FWIW it does not reproduce
on aarch64.