Re: Random “http first read error: EOF” errors

[Hazar Güney]

It is default value which is 60:

param.show backend_idle_timeout
200
backend_idle_timeout
        Value is: 60.000 [seconds] (default)
        Minimum is: 1.000

        Timeout before we close unused backend connections.

On Wed, Mar 29, 2017 at 11:18 AM, Guillaume Quintard <
guillaume at varnish-software.com> wrote:

> I'm suspecting Apache's closing a keep-alive connection because it and
> Varnish didn't agree on the timeout. Can you check? (in varnish, the param
> is called backend_idle_timeout)
>
> --
> Guillaume Quintard
>
> On Wed, Mar 29, 2017 at 10:12 AM, Hazar Güney <hazarguney at gmail.com>
> wrote:
>
>> Backend is Apache.
>>
>> On Wed, Mar 29, 2017 at 10:34 AM, Guillaume Quintard <
>> guillaume at varnish-software.com> wrote:
>>
>>> Indeed, looking at the Timestamp lines, it's not a timeout. What's your
>>> backend?
>>>
>>> --
>>> Guillaume Quintard
>>>
>>> On Wed, Mar 29, 2017 at 7:45 AM, Hazar Güney <hazarguney at gmail.com>
>>> wrote:
>>>
>>>> I see sporadic fetch errors (http first read error: EOF) from backend
>>>> but backend is normally healthy. It seems that timeout is not the root
>>>> issue in this case. What could be the reason?
>>>>
>>>> *   << BeReq    >> 98808229
>>>> -   Begin          bereq 98808228 fetch
>>>> -   Timestamp      Start: 1490683823.763272 0.000000 0.000000
>>>> -   BereqMethod    GET
>>>> -   BereqURL       XXXX
>>>> -   BereqProtocol  HTTP/1.1
>>>> -   BereqHeader    Pragma: no-cache
>>>> -   BereqHeader    Accept: */*
>>>> -   BereqHeader    From: bingbot(at)microsoft.com
>>>> -   BereqHeader    Host: XXXX
>>>> -   BereqHeader    User-Agent: Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)
>>>> -   BereqHeader    Accept-Encoding: gzip
>>>> -   BereqHeader    X-Varnish: 98808229
>>>> -   VCL_call       BACKEND_FETCH
>>>> -   VCL_return     fetch
>>>> -   BackendOpen    38 reload_2017-03-20T11:32:44.st2 10.35.78.11 80 172.17.0.2 48388
>>>> -   BackendStart   10.35.78.11 80
>>>> -   Timestamp      Bereq: 1490683823.763758 0.000487 0.000487
>>>> -   *FetchError*     *http first read error: EOF*
>>>> -   BackendClose   38 reload_2017-03-20T11:32:44.st2
>>>> -   Timestamp      Beresp: 1490683823.764271 0.000999 0.000513
>>>> -   Timestamp      Error: 1490683823.764277 0.001005 0.000005
>>>> -   BerespProtocol HTTP/1.1
>>>> -   BerespStatus   503
>>>> -   BerespReason   Service Unavailable
>>>> -   BerespReason   Backend fetch failed
>>>> -   BerespHeader   Date: Tue, 28 Mar 2017 06:50:23 GMT
>>>> -   BerespHeader   Server: Varnish
>>>> -   VCL_call       BACKEND_ERROR
>>>> -   BereqHeader    X-Varnish-Backend-5xx: 1
>>>> -   VCL_return     retry
>>>> -   Timestamp      Retry: 1490683823.764294 0.001022 0.000017
>>>> -   Link           bereq 97940444 retry
>>>> -   End
>>>>
>>>>
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>>>>
>>>
>>>
>>
>
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