#43 — POSKeyError after BlobField.set

by Joerg Baach — last modified Aug 16, 2010 09:57 PM

State	Resolved
Version:	1.0
Area	Functionality
Issue type	Bug
Severity	Medium
Submitted by	Joerg Baach
Submitted on	Aug 10, 2010
Responsible	Andreas Zeidler
Target release:	—

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When having lots of simultanious write requests (e.g. I use firefox file drag and drop with 20 files) some of the blob files don't seem to get written - instead when trying to access them (e.g. when indexing their size via reindexObject) a POSKeyError("No blob file", oid, serial) gets thrown.

This seems to fixable by closing the BlobFile in plone.app.blob.adapters.stringio.BlobbableStringIO. See

http://baach.de/[…]/view

At least this works for me

Steps to reproduce:: 20 simultanious calls of

BlobField.set
<any access on the blob>

Added by Joerg Baach on Aug 12, 2010 08:53 AM

Maybe, just maybe a false alarm. At least the error can be avoided if a transaction.savepoint() is set before doing anything with the blob

Added by Andreas Zeidler on Aug 12, 2010 03:04 PM

Issue state: Unconfirmed → Resolved

Responsible manager: (UNASSIGNED) → witsch

http://dev.plone.org/plone/changeset/38714 changes all `IBlobbable` adapters to explicitly close the blobs after writing to them — being explicit is better here no matter if this helps with your issue or not.

apart from that, thanks for the report & please let me know should the problem occur again...

Added by Andreas Zeidler on Aug 12, 2010 03:05 PM

trying to comment on your blog entry yield a site error, btw... ;)

Added by Joerg Baach on Aug 12, 2010 08:05 PM

Need to fix the commenting, will do so once I have this intranet tool running. Thx a lot! :-)

Added by Andreas Zeidler on Aug 16, 2010 09:57 PM

btw, since david (glick) just mentioned it, would you perhaps care to open-source that drag & drop integration you built for your intranet? i think that would make a great addition to plone... ;)

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