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Re: pkgsrc build hang of python38

On Sat, 27 Feb 2021 at 20:51, Riccardo Mottola
<> wrote:
> Hi,
> after succesfully upgrading to  9.99.80 with a full distribution
> rebuild, I am also rebuilding pkgsrc!I did follow the pkgdb migration.
> python38 hangs during build. I tried several times, it hangs in exactly
> the same place again. I don't know of course where the issue comes from,
> since all is new now :)
> /usr/bin/install -c -o root -g wheel -m 644 ./Lib/pydoc_data/
> /usr/pkg/lib/python3.8/pydoc_data
> /usr/bin/install -c -o root -g wheel -m 644 ./Lib/pydoc_data/_pydoc.css
> /usr/pkg/lib/python3.8/pydoc_data
> /usr/bin/install -c -o root -g wheel -m 644 ./Lib/pydoc_data/
> /usr/pkg/lib/python3.8/pydoc_data
> /usr/bin/install -c -o root -g wheel -m 644 `cat
> pybuilddir.txt`/
> /usr/pkgsrc/lang/python38/work/.destdir/usr/pkg/lib/python3.8;
> /usr/bin/install -c -o root -g wheel -m 644 ./LICENSE
> /usr/pkgsrc/lang/python38/work/.destdir/usr/pkg/lib/python3.8/LICENSE.txt
> if test -d
> /usr/pkgsrc/lang/python38/work/.destdir/usr/pkg/lib/python3.8/distutils/tests;
> then  /usr/bin/install -c -o root -g wheel -m 644 ./Modules/xxmodule.c
> /usr/pkgsrc/lang/python38/work/.destdir/usr/pkg/lib/python3.8/distutils/tests
> ;  fi
> PYTHONPATH=/usr/pkgsrc/lang/python38/work/.destdir/usr/pkg/lib/python3.8
> LD_LIBRARY_PATH=/usr/pkgsrc/lang/python38/work/Python-3.8.8 ./python -E
> -Wi
> /usr/pkgsrc/lang/python38/work/.destdir/usr/pkg/lib/python3.8/
> -j0 -d /usr/pkg/lib/python3.8 -f  -x
> 'bad_coding|badsyntax|site-packages|lib2to3/tests/data'
> /usr/pkgsrc/lang/python38/work/.destdir/usr/pkg/lib/python3.8
> It hangs here with almost 0 cpu consumption, top shows a 99% idle
> system. I clean, retry and hang there again!

When it happens again, try finding the exact process which is hanging
at the moment ( best is with htop in tree mode ), then attach to it
with gdb and run 'thread apply all bt' - I bet all threads (bar one)
are waiting... When you quit gdb, the process magically continues...

That has been happening with my builds, mainly when I do
'pkg_rolling-replace', all the time the last several months, I am sure
you can find the mail archives. i still don't know if it is only a
problem with the entropy or something with the thread processing. In
my case it happens most often when running cmake and rebuilding some
kde packages, but this happens elsewhere as well.

> I tried upgrading python27 .... but that pulls in python38, so I hang
> again.... and if I try updating other packages I will end up tehre,
> consistent hang-
> Riccardo


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