Yum 2.2 w/ HTTP proxy fails w/ error "Cannot find a validbaseurlfor repo:"

[gaurav]

Paul Howarth wrote:


>>which yum tries to use.  A typical TCP conversation goes like this:
>>   yum>    GET ...
>>   yum>    Host: ...
>>   yum>    Accept-Encoding: identity
>>   yum>    Proxy-authorization: Basic xxxxxxxxxxxxxxxxx
>>   yum>                      <--- Blank line which shouldn't be here
>>   yum>    User-agent: urlgrabber/2.9.2
>>   yum>
>>   proxy<  HTTP/1.1 200 OK
>>   proxy<  ...
>>   proxy<  Content-Length: ...
>>   proxy<  ...
>>   proxy<  Keep-Alive: ...
>>   proxy<
>>   proxy<  [Requested URL contents ...]
>>   proxy<  ...
>>   proxy<  HTTP/1.1 400 Bad Request ( The data is invalid. )
>>   proxy<  ...
>>   proxy<  Connection: close
>>   proxy<  Proxy-Connection: close
>>   proxy<  ...
>>   yum>    GET ...
>>   yum>    Host: ...
>>   yum>    Accept-Encoding: identity
>>   yum>    Proxy-authorization: Basic xxxxxxxxxxxxxxxxx
>>   yum>                      <--- Blank line which shouldn't be here
>>   yum>    User-agent: urlgrabber/2.9.2
>>   yum>
>>And the connection closes or times out.
>>
>>So Yum (or urlgrabber) is incorrectly inserting a new line after the
>>Proxy-authorization header before adding the User-agent header.  MS
>>ISA web proxy thinks that it's 2 separate requests, the first works and
>>the second results in an error message. 
>>
I think your observation is right :-) ......Looks Like I am facing same 
problem... I am also getting same error..
as I have proxy here

>> Yum doesn't realise as it only
>>reads the specified number of bytes for its first request.  It then
>>reuses the connection, sending another request.  It reads the
>>previously buffer / unread data and see the error from the proxy.  The
>>difference between yum 2.1 and 2.2 is that the particular files which
>>they try to read from closed sockets differ, probably because yum 2.1
>>reads mirror lists for repos its not using and yum 2.2 doesn't.  Yum
>>2.1 only ever sees the failures on files it can and does re-try, so it
>>eventually succeeds.  Where as as yum 2.2 sees the failures on getting
>>the mirror lists which it doesn't re-try so always fails.
>>
>>This explanation suggests not using mirrorlist parameter and switching
>>back to baseurl instead as a possible work around for yum 2.2.  I will
>>try this in a later.
>>
>>With all this I have only done one or two tests with yum 2.2 specifying
>>proxy parameters in the configuration file.  Results seem to indicate
>>that it just ignores these but don't count on this being the truth.
>>    
>>
>
>Excellent detective work!
>
>I'd suggest raising a bug on yum for this, and/or contacting the author,
>Seth Vidal <skvidal at phy dot duke dot edu>, who I've always found to
>be very responsive.
>
>Paul.
>  
>