Re: Pkgsrc python cannot import SemLock on CentOS

[Adam <adam%netbsd.org@localhost>]

Is /dev/shm mounted?

How about Python 3.7.1?

Adam


> Anyone know how to get around this?  It's hit me a couple of times now in applications I'd really
> like to deploy via pkgsrc.
> 
> Yum's python imports fine, but I've seen this issue with multiple versions of pkgsrc python.
> 
> It's not true that the platform lacks a functioning sem_open().
> 
> Thanks,
> 
>     JB
> 
> Pkgsrc python:
> 
> Linux centosdev.ceas  bacon ~ 1019: python3.7
> Python 3.7.0 (default, Oct 15 2018, 04:47:22)
> [GCC 6.4.0] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import multiprocessing
> >>> from multiprocessing import synchronize
> Traceback (most recent call last):
>   File "/usr/pkg/lib/python3.7/multiprocessing/synchronize.py", line 29, in <module>
>     from _multiprocessing import SemLock, sem_unlink
> ImportError: cannot import name 'SemLock' from '_multiprocessing' (/usr/pkg/lib/python3.7/lib-dynload/_multiprocessing.so)
> 
> During handling of the above exception, another exception occurred:
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/pkg/lib/python3.7/multiprocessing/synchronize.py", line 33, in <module>
>     " synchronization primitives needed will not" +
> ImportError: This platform lacks a functioning sem_open implementation, therefore, the required synchronization primitives needed will not function, see issue 3770.
> >>>
> 
> Yum python:
> 
> Linux centosdev.ceas  bacon ~ 1019: /usr/bin/python
> Python 2.7.5 (default, Jul 13 2018, 13:06:57)
> [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import multiprocessing
> >>> from multiprocessing import synchronize
> >>>
> 
> Linux centosdev.ceas  bacon ~ 1020: uname -a
> Linux centosdev.ceas.uwm.edu 3.10.0-693.11.1.el7.x86_64 #1 SMP Mon Dec 4 23:52:40 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
> Linux centosdev.ceas  bacon ~ 1022: cat /etc/redhat-release
> CentOS Linux release 7.5.1804 (Core)
>