This is now fixed in trunk.
-Damien
On Apr 27, 2009, at 1:49 PM, Steven Hazel wrote:
Okay, I think I've confirmed this theory. Thanks to your guidance I
managed
to create a python script that can reproduce the problem on my
macbook:
http://saucelabs.com/couch-bug.py
(To run it, you need the latest trunk version of couchdb-python.)
Looking at our logs, we started seeing this problem just after we
crossed
the threshold to >100 dbs. And very frequent reads to the problematic
database fixed the issue, because they made it always more recently
active
than most of the others.
- Steve
On Mon, Apr 27, 2009 at 9:40 AM, Steven Hazel <[email protected]>
wrote:
I think we do have a lot of active databases -- we have a view that
is run
frequently against each of our 137 databases.
- Steve
On Mon, Apr 27, 2009 at 6:20 AM, Damien Katz <[email protected]>
wrote:
It looks like the db server instance is being restarted before it
commits
the header, but it's odd you aren't seeing any errors on the
console. If
it's a crash it should dump an error to the console.
One thing that occurs to me, do you have a lot of active databases
(> 100)
? I think it's possible when you hit the max dbs open, CouchDB
will shutdown
an idle instance with pending deferred commit, which is a bug.
-Damien
On Apr 27, 2009, at 12:52 AM, Steven Hazel wrote:
Hi,
Last week we discovered that records in one of our CouchDB
databases were
occasionally being reverted to the previous revision. We believe
this is
due
to a bug in CouchDB 0.9 related to asynchronous writes. Turning
off
asynchronous writes with the X-Couch-Full-Commit header fixes the
problem
for us. I've written up the problem in more detail here:
http://saucelabs.com/couch-bug.html
We haven't yet reproduced this problem outside our production
environment,
but can trigger it there on-demand. Although we have a work-
around that
solves the immediate problem for us, we're happy to help out in
tracking
down the underlying issue. Any advice on how to proceed would be
appreciated.
--
Steven Hazel
Sauce Labs
Cofounder and Director, Development
http://twitter.com/sahazel
--
Steven Hazel
Sauce Labs
Cofounder and Director, Development
http://twitter.com/sahazel
--
Steven Hazel
Sauce Labs
Cofounder and Director, Development
http://twitter.com/sahazel
