Package: python-x2go Severity: important

Since python-gevent 1.0 gevent fails to detect DNS changes (e.g. when
connecting to a VPN server).

From http://gevent.org/whatsnew_1_0.html :

""" New dns resolver

Two new DNS resolvers: threadpool-based one (enabled by default) and
c-ares based one. That threadpool-based resolver was added mostly for
Windows and Mac OS X platforms where c-ares might behave differently
w.r.t system configuration. On Linux, however, the c-ares based
resolver is probably a better choice. To enable c-ares resolver set
GEVENT_RESOLVER=ares environment variable.

This fixes some major issues with DNS on 0.13.x, namely:

 Issue #2: DNS resolver no longer breaks after fork(). You still  

need to call gevent.fork() (os.fork is monkey patched with it if
monkey.patch_all() was called). DNS resolver no longer ignores /etc/resolv.conf and /etc/hosts.

The following functions were added to socket module:

 gethostbyname_ex
 getnameinfo
 gethostbyaddr
 getfqdn

It is possible to implement your own DNS resolver and make gevent use
it. The GEVENT_RESOLVER variable can point to alternative
implementation using the format: package.module.class. The default is
gevent.resolver_thread.Resolver. The alternative “ares” resolver is an
alias for gevent.resolver_ares.Resolver. """

Thus: we need to enforce setting of env variable GEVENT_RESOLVER=ares
in Python X2Go.

Mike

DAS-NETZWERKTEAM mike gabriel, herweg 7, 24357 fleckeby fon: +49 (1520) 1976 148

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