Re: F12: Yum - network disconnects spins it's wheels.

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On 02/25/2010 03:58 PM, Daniel B. Thurman wrote:
> On 02/25/2010 03:53 PM, Ed Greshko wrote:
>> Daniel B. Thurman wrote:
>>
>>> On 02/25/2010 03:21 PM, Ed Greshko wrote:
>>>
>>>
>>>> Daniel B. Thurman wrote:
>>>>
>>>>
>>>>
>>>>> Seems to me, that Yum is performing quite
>>>>> badly.  I often get network disconnects and Yum
>>>>> keeps spinning after going into 0.0b transfer rates
>>>>> forever and requires a forced kill.
>>>>>
>>>>>
>>>>>
>>>>>
>>>> Ahhh....  If you are getting network disconnects then any application
>>>> yum, firefox, etc. which connects to a remote server would certainly
>>>> suffer.  Some apps/protocols may recover better when the network is
>>>> restored.
>>>>
>>>> So, are you saying that in your case the network connection is dropping
>>>> frequently and yum isn't recovering as you'd expect?
>>>>
>>>>
>>>>
>>> I am saying specifically with Yum, it somehow loses the connection,
>>> and you can see the transfer rate slowly drop to 0.0b, the ETA
>>> grows ridiculously large and getting larger... and stays that
>>> way "forever", until one kills yum.  This disconnect happens
>>> quite often that it takes several yum restarts to complete
>>> the downloads.
>>>
>>>
>>>> Or....
>>>>
>>>>
>>>>
>>>>> Anyone see this problem?
>>>>>
>>>>> I am of course using NetworkManager, and wonder
>>>>> if I should use the old-network connectivity style?
>>>>>
>>>>>
>>>>>
>>>> Are you saying you're having frequent network disconnects, but you don't
>>>> know why, and you are trying to solve that problem?
>>>>
>>>>
>>>>
>>> Yes, and I do not know why - seems the other apps are running
>>> fine, AFAIK, unless there is a test that can ram the network hard
>>> to see if it is dropping network connections frequently or not.
>>>
>>> So, I am willing to test the network on F12 to discover if the
>>> problem is mine alone. Could you or someone tell me how
>>> check this out?  I had no problems on F9/11 - works fine.
>>>
>>>
>>>
>> OK, I believe I understand your question a bit better.
>>
>> Since you are able to use firefox, for example, without problem it
>> doesn't appear you have a true network issue.  Or, at least, it isn't
>> local to you.  If firefox were also giving you grief it would be a
>> different story.
>>
>> Generally I'm having no issues with yum on updates or installs.  I did
>> have to add "exclude=.gov, .sg"
>> to my fastestmirror.conf as I use yum-plugin-fastestmirror and have had
>> issues with slow network to Singapore.
>>
>> Are you using yum-plugin-fastestmirror
> Yes.  I tried it with and without.  Problems are the same.  Seems to
> me it is a yum problem, but I am speculating.  I am running FF. sendmail,
> DNS, etc.. a LOT of services and I am not seeing any problems.  Just
> with yum installs/updates.

Just for giggles, can you turn off iptables and try again?  I have
noticed that in the default ruleset, large transfers sometimes get
stalled (primarily outgoing traffic, such as an ftp put or scp from
local machine to a remote).

I haven't had time to see which rule(s) cause it.  I'm usually pushed
for time, so every time I get it, I "service iptables stop", do my
transfer, then "service iptables start" and promptly forget to debug it.
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