[yocto] Fetcher error reporting

[Darren Hart]

On 10/22/2010 04:44 PM, Darren Hart wrote:
> On 10/22/2010 04:38 PM, Richard Purdie wrote:
>> On Fri, 2010-10-22 at 11:22 -0700, Darren Hart wrote:
>>> Here is an example of the do_fetch/do_unpack failure that I believe is
>>> representative of what Dirk saw and what I have been seeing
>>> periodically.
>>>
>>> I saw the following while building libproxy in poky-image-sdk-live on a
>>> Fedora 13 box behind the firewall. I saw identical failures with opkg on
>>> a different machine - also behind the firewall. Both SRC_URIs point to
>>> googlecode.
>>>
>>> log.do_fetch:
>>> -------------
>>> NOTE: fetch http://libproxy.googlecode.com/files/libproxy-0.4.3.tar.gz
>>> NOTE: libproxy-0.4.3:
>>> http://libproxy.googlecode.com/files/libproxy-0.4.3.tar.gz has no entry
>>> in conf/checksums.ini, not checking URI
>>>
>>> log.do_unpack:
>>> --------------
>>> gzip: stdin: unexpected end of file
>>> tar: Child returned status 1
>>> tar: Exiting with failure status due to previous errors
>>> NOTE: Unpacking
>>> /vol/1/dvhart/poky.git/build/downloads/libproxy-0.4.3.tar.gz to
>>> /vol/1/dvhart/poky.git/build/tmp/work/i586-poky-linux/libproxy-0.4.3-r2/
>>> ERROR: Task failed:
>>>
>>> With opkg, I tried the following which resulted in the same error.
>>>
>>> $ bitbake -c clean;
>>> $ rm downloads/*opkg*
>>> $ bitbake opkg
>>>
>>> In both cases, using wget to manually download the file and place it in
>>> the downloads directory allowed the build to continue.
>>
>> We've talked about this a lot over jabber. We don't have a reproducer.
>> What we do see is its always the wget fetcher that hits this (for mirror
>> urls in the case of git repos) and its failing creating a zero length
>> file.
>>
>> If we make the assumption that wget is creating the empty file and
>> exiting with an error code and look at what bitbake would do, it would
>> give the behaviour described in these bugs.
>>
>> Why? If the original fetch fails, it falls back to the mirror code. That
>> looks, sees a file on the disk and says "nothing to do".
>>
>> Solution is therefore to make sure if the wget fetcher fails we wipe any
>> file that may be present.
>>
>> Is is possible the wget fetcher is creating a zero length file and no
>> setting an error code but I really hope its not that broken.
>>
>> So I've pushed this patch as a bandaid for the problem:
>>
>> http://git.pokylinux.org/cgit/cgit.cgi/poky/commit/?id=c5fab99a6f979a4a0ce246c6395b35a3082aec0d
>>
>>
>
> I've applied and am running another build.

One poky-image-sdk-live build completed from a clean slate from inside 
the firewall. I have another outside the firewall that will take a bit 
longer, but is well on its way without any errors. Looking good.

-- 
Darren Hart
Embedded Linux Kernel