ImportError: cannot import name greenpool

Pete Zhang peiyong.zhang at salesforce.com
Thu Jun 17 20:04:08 UTC 2021


>From the [0], it appears dnspython is NOT installed properly.
I installed python-dnspython (not sure if its the same as dnspython) and
still don't see *dns* or "base" under
/lib/python2.7/site-packages/dns/rdtypes/ANY as [0] mentioned.

sh-4.2# pwd

/lib/python2.7/site-packages/dns/rdtypes/ANY

sh-4.2# ls -ail *dns*

ls: cannot access *dns*: No such file or directory

sh-4.2# ls -ail *base*

ls: cannot access *base*: No such file or directory

sh-4.2# ls -ail __init*

540159 -rw-r--r--. 1 root root 1169 Jun 13  2015 __init__.py

540248 -rw-r--r--. 2 root root  602 Aug  3  2017 __init__.pyc

540248 -rw-r--r--. 2 root root  602 Aug  3  2017 __init__.pyo

sh-4.2# yum list | grep dnspython

python-dnspython.noarch               1:1.10.0-1
@ORB-extras

sfdc-python27-dnspython.noarch        1.15.0-2019.10.311854.7.el7
strata_sfdc-python

sfdc-python35-dnspython.noarch        1.15.0-2019.04.081624.7.el7
strata_sfdc-python

sfdc-python36-dnspython.noarch        1.15.0-2021.05.122008.34.el7

sh-4.2# yum list installed | grep dnspython

python-dnspython.noarch           1:1.10.0-1               @ORB-extras


sh-4.2#


On Thu, Jun 17, 2021 at 12:19 PM Clark Boylan <cboylan at sapwetik.org> wrote:

> On Thu, Jun 17, 2021, at 11:58 AM, Pete Zhang wrote:
> > Clark,
> >
> > I  adjusted the version of greenlet/eventlet as required by other
> > modules. here is the output:
> >
> > ImportError: No module named dnskeybase
> >
> > sh-4.2# yum list installed | grep "greenlet\|eventlet\|gevent"
> >
> > python2-eventlet.noarch           0.25.1-1.el7
>  @local_openstack-tnrp
> >
> > python2-gevent.x86_64             1.1.2-2.el7
> @local_openstack-tnrp
> >
> > python2-greenlet.x86_64           0.4.12-1.el7
>  @local_openstack-tnrp
> >
> > sh-4.2# python2
> >
> > Python 2.7.5 (default, Oct 30 2018, 23:45:53)
> >
> > [GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
> >
> > Type "help", "copyright", "credits" or "license" for more information.
> >
> > >>> from eventlet import greenpool
> >
> > Traceback (most recent call last):
> >
> >   File "<stdin>", line 1, in <module>
> >
> >   File "/usr/lib/python2.7/site-packages/eventlet/__init__.py", line
> > 10, in <module>
> >
> >     from eventlet import convenience
> >
> >   File "/usr/lib/python2.7/site-packages/eventlet/convenience.py", line
> > 7, in <module>
> >
> >     from eventlet.green import socket
> >
> >   File "/usr/lib/python2.7/site-packages/eventlet/green/socket.py",
> > line 21, in <module>
> >
> >     from eventlet.support import greendns
> >
> >   File "/usr/lib/python2.7/site-packages/eventlet/support/greendns.py",
> > line 67, in <module>
> >
> >     setattr(dns.rdtypes, pkg, import_patched('dns.rdtypes.' + pkg))
> >
> >   File "/usr/lib/python2.7/site-packages/eventlet/support/greendns.py",
> > line 59, in import_patched
> >
> >     return patcher.import_patched(module_name, **modules)
> >
> >   File "/usr/lib/python2.7/site-packages/eventlet/patcher.py", line
> > 126, in import_patched
> >
> >     *additional_modules + tuple(kw_additional_modules.items()))
> >
> >   File "/usr/lib/python2.7/site-packages/eventlet/patcher.py", line
> > 100, in inject
> >
> >     module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
> >
> > ImportError: No module named dnskeybase
> >
> > >>>
>
> The internet indicates [0] this is a problem with your dnspython
> installation. That post uses pip, but you are using distro packages so you
> may need to map things a bit to do further debugging. Hopefully, that helps
> get things sorted though.
>
> [0]
> https://stackoverflow.com/questions/55152733/eventlet-importerror-no-module-named-dnskeybase
>
> >
> >
> > On Thu, Jun 17, 2021 at 10:44 AM Clark Boylan <cboylan at sapwetik.org>
> wrote:
> > > On Thu, Jun 17, 2021, at 10:03 AM, Pete Zhang wrote:
> > > > Not sure if my previous email went through or not. Just resend it.
> > > >
> > > > We hit this error during "glance-manage db_sync":
> > > > *ImportError: cannot import name greenpool.*
> > > > Any idea what the root cause is and how to fix it?
> > > > We have the following rpms installed (thought related).
> > > >
> > > > `python2-greenlet-0.4.9-1.el7.x86_64.rpm`
> > > > `python2-eventlet-0.18.4-2.el7.noarch.rpm`
> > > > `python2-gevent-1.1.2-2.el7.x86_64.rpm`
> > > >
> > > >
> > >
> > > snip
> > >
> > > > Notice:
> /Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]/returns:
> > > >   from eventlet import greenpool
> > > >
> > > > Notice:
> /Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]/returns:
> > > > ImportError: cannot import name greenpool
> > >
> > > I'm not familiar with the CentOS7 packaging, but as a sanity check I
> ran `pip install greenlet==0.4.9 eventlet==0.18.4` in a python2 virtualenv
> then in a python2 interpreter `from eventlet import greenpool` runs
> successfully. I would try running this import by hand on your system to see
> if you can get any more information. Could be a packaging issue or
> potentially some sort of name collision between script names?
> > >
> > > Clark
>


-- 

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