[ZODB-Dev] Wrong blob returned in one of the zeo clients

[Maurits van Rees]

Op 01-03-11 04:41, Shane Hathaway schreef:
> On 02/28/2011 09:29 AM, Maurits van Rees wrote:
>> This is now also happening for some images during normal operation, so
>> after any blob migration has been run and existing blob caches have been
>> cleared.  What happens is that somehow the file contents for
>> 0xblahblah.blob in the blob caches can differ between two zeo clients,
>> even when the image has not changed at all (only tried with images as it
>> is easier to spot than with other files).
>
> Thanks for the report.  Looking through the blob code, I noticed that
> when the system is using a blob cache, it was possible for a thread to
> get a partial file while another thread is downloading that file.  I
> suspect this is the problem you saw.  I have committed a fix.

Thanks!  I'll test this.

-- 
Maurits van Rees
Web App Programmer at Zest Software: http://zestsoftware.nl
Personal website: http://maurits.vanrees.org/