[petsc-users] osx error

[Barry Smith]

> On Sep 17, 2020, at 4:59 PM, Satish Balay via petsc-users <petsc-users at mcs.anl.gov> wrote:
> 
> Here is a fix:
> 
> echo 127.0.0.1 `hostname` | sudo tee -a /etc/hosts

 Satish,

   I don't think you want to be doing this on a Mac (on anything?) On a Mac based on the network configuration etc as it boots up and as networks are accessible or not (wi-fi) it determines what hostname should be, one should never being hardwiring it to some value.

  Barry


> Satish
> 
> On Thu, 17 Sep 2020, Matthew Knepley wrote:
> 
>> We should have an option to disable the test.
>> 
>>   Matt
>> 
>> On Thu, Sep 17, 2020 at 5:31 PM Satish Balay via petsc-users <
>> petsc-users at mcs.anl.gov> wrote:
>> 
>>> On Thu, 17 Sep 2020, Mark Adams wrote:
>>> 
>>>> I rebased over master and started getting this error.
>>>> I did reinstall MPICH (brew) recently.
>>>> Any ideas?
>>>> Thanks,
>>>> Mark
>>> 
>>> 
>>> -------------------------------------------------------------------------------
>>> Exception: Your hostname will not work with MPI, perhaps you have VPN
>>> running whose network settings may not play well with MPI or your network
>>> is misconfigured
>>> 
>>> *******************************************************************************
>>> 
>>> 
>>> Ok - this is a new test that got added to check for broken network that
>>> breaks MPI.
>>> 
>>> Here is the check:
>>> 
>>> Executing: ping -c 2 MarksMac-302.local
>>> 
>>> The check says you have broken network settings. [as its not responding to
>>> ping.]
>>> 
>>> Does MPI work fine on this box? You can try disabling this check
>>> (manually) - and do the build, and run
>>> 
>>> Does MPI run fine?
>>> 
>>> Satish
>>> 
>>> 
>>>>>>>>>>>>>> 
>>> 
>>> diff --git a/config/BuildSystem/config/packages/MPI.py
>>> b/config/BuildSystem/config/packages/MPI.py
>>> index 2e130fdcfe..8464de6773 100644
>>> --- a/config/BuildSystem/config/packages/MPI.py
>>> +++ b/config/BuildSystem/config/packages/MPI.py
>>> @@ -267,7 +267,7 @@ shared libraries and run with
>>> --known-mpi-shared-libraries=1')
>>>               if ret != 0:
>>>                 raise RuntimeError(errormessage+" Return code %s\n" % ret)
>>>             except:
>>> -              raise RuntimeError("Exception: "+errormessage)
>>> +              pass
>>>           else:
>>>             self.logPrint("Unable to get result from hostname, skipping
>>> ping check\n")
>>> 
>>> 
>> 
>> 
>