Comment 12 for bug 607117

SOLO SÉ ESPAÑOL (Only Spanisch)

> Date: Tue, 25 Jan 2011 18:47:53 +0000
> From: <email address hidden>
> To: <email address hidden>
> Subject: RE: [Bug 607117] Re: dnspython-1.7* uses /dev/random which might block on lucid
>
>
> Perdón, NO entiendo nada del idioma INGLES y por ésta causa no sé de que va este correo, lo siento mucho.
>
> > Date: Tue, 25 Jan 2011 10:12:35 +0000
> > From: <email address hidden>
> > To: <email address hidden>
> > Subject: [Bug 607117] Re: dnspython-1.7* uses /dev/random which might block on lucid
> >
> > The patch works for me, tested on two different lucid machines.
> >
> > greetings, Mati
> >
> > --
> > You received this bug notification because you are subscribed to Ubuntu
> > ubuntu-10.04.2.
> > https://bugs.launchpad.net/bugs/607117
> >
> > Title:
> > dnspython-1.7* uses /dev/random which might block on lucid
> >
> > Status in The Trac Project:
> > New
> > Status in “dnspython” package in Ubuntu:
> > Fix Released
> > Status in “dnspython” source package in Lucid:
> > Fix Committed
> >
> > Bug description:
> > The python-dnspython package (most specifically, dns/resolver.py at
> > line 25-29) uses /dev/random to get random data. I observed that this
> > blocks on /some/ machines that have Ubuntu 10.04 installed. It does
> > not seem to happen on older versions. This causes the import of
> > dns.entropy to block most of the time (but not always).
> >
> > The solution is to use /dev/urandom instead. Two possible ways to solve this problem:
> > 1. Provide a 1.8.0 package in the main repositories - it seems to have the bug fixed and is a maintenance release according to the homepage
> > 2. replace '/dev/random' with '/dev/urandom' in entropy.py, line 25. I tested this solution and it no longer causes the import to block.
> >
> > TEST CASE:
> >
> > It seems as if the problem does not occur on *all*, but only *most*
> > systems running lucid - presumably systems with not to much entropy,
> > like servers. On affected systems, the command
> >
> > python -c "from dns import entropy"
> >
> > hangs. After applying the above patch, the system no longer hangs.
> >
> >
>
> --
> You received this bug notification because you are subscribed to Ubuntu
> ubuntu-10.04.2.
> https://bugs.launchpad.net/bugs/607117
>
> Title:
> dnspython-1.7* uses /dev/random which might block on lucid
>
> Status in The Trac Project:
> New
> Status in “dnspython” package in Ubuntu:
> Fix Released
> Status in “dnspython” source package in Lucid:
> Fix Released
>
> Bug description:
> The python-dnspython package (most specifically, dns/resolver.py at
> line 25-29) uses /dev/random to get random data. I observed that this
> blocks on /some/ machines that have Ubuntu 10.04 installed. It does
> not seem to happen on older versions. This causes the import of
> dns.entropy to block most of the time (but not always).
>
> The solution is to use /dev/urandom instead. Two possible ways to solve this problem:
> 1. Provide a 1.8.0 package in the main repositories - it seems to have the bug fixed and is a maintenance release according to the homepage
> 2. replace '/dev/random' with '/dev/urandom' in entropy.py, line 25. I tested this solution and it no longer causes the import to block.
>
> TEST CASE:
>
> It seems as if the problem does not occur on *all*, but only *most*
> systems running lucid - presumably systems with not to much entropy,
> like servers. On affected systems, the command
>
> python -c "from dns import entropy"
>
> hangs. After applying the above patch, the system no longer hangs.
>
>