Hi there,
Before debugging this deeper I was hoping someone might already have an idea
why this is happening:
We're running Plone 4 with RelStorage, Mysql and two Memcached instances.
We're now seeing random exceptions from the memcache client package on
commit, such as:
Module ZPublisher.Publis
2010/9/14 Alan Runyan
> you didnt specify version of relstorage or zodb you are using, nor
> version of memcahe or python memcached lib version
>
Good point.
python-memcached 1.45
ZODB 3.9.5
Zope 2.12.10
Relstorage 1.4.0c3
/Anton
___
For more inform
Hi Shane,
2010/9/15 Shane Hathaway
> This is a bug in python-memcached. Under some circumstances,
> _val_to_store_info() returns 0 (see line 713), yet set_multi(), line 643, is
> not prepared to handle that return value. You would be doing a good service
> if you reported this to the authors.
2010/10/22 Sylvain Viollon wrote:
I have a Zope 2, using RelStorage and python_memcached. I use
> python_memcached because I use it in some other extension.
>
> I got the following traceback on a commit (..)
>
TypeError: 'int' object is unsubscriptable
>
Shane answered that one last month:
Hi,
In order to scale an application using RelStorage I was thinking about
seperating reads and writes accross databases. Writes would go to a Mysql
master and the app would read from one or more Mysql slaves.
It looks like RelStorage already keeps seperate connections for read and
write (even th
Hi Shane,
In order to scale an application using RelStorage I was thinking about
>> seperating reads and writes accross databases. Writes would go to a
>> Mysql master and the app would read from one or more Mysql slaves.
>>
>
> If you mean that you intend to set up some clients to write to a ma
Hi there,
We have recently experienced a couple of PosKey errors with a Plone 4 site
running RelStorage 1.4.1 and Mysql 5.1.
After digging down we found that the objects that were throwing
PosKeyErrors actually existed in the object_state table with pickles etc,
however not in the current_object
Hi Shane,
Thanks for pursuing this.
I have lots of other ideas now, but I don't know which to pursue. I need a
> lot more information. It would be helpful if you sent me your database to
> analyze. Some possible causes:
>
> - Have you looked for filesystem-level corruption yet? I asked this b
ce, but in this case
mange_delObjects threw an poskeyerror.
However calling
billeder._delObject('image.2006-03-19.5540330656')
instead did the trick.
/Anton Stonor
___
For more information about ZODB, see the ZODB Wiki:
http://www.zope.org/Wikis/ZODB/
We have a setup with a ZEO server and 4 ZEO clients.
During the last weeks we have seen almost daily deadlocks in some of the
ZEO clients. I've tried to wait for up to 30 minutes before restarting a
client.
I could need an advice on how to debug this.
With DeadlockDebugger I see the same pat
Thanks for you suggestions, Alan, Roché and Dieter,
I'll switch the zeo server logging to debug level even though the amount
of data is scary -- and try to find a way to reduce the load on the ZEO
server (Roché).
I think you (Alan and Dieter) might be right that there could be a
network issu
Hi there,
Ben Mason wrote:
We've come across the following problem: When trying to revert to an old
version of a page, we get a unicode error:
Module Products.CMFEditions.ZVCStorageTool, line 505, in _encodeMetadata
UnicodeDecodeError: 'ascii' codec can't decode byte 0x80 in position 0:
ord
Hi there,
Just wanted to share that RelStorage does not work with the MySQLdb
1.2.1 adapter. 1.2.2 seems to work fine.
The symptom is this error message while starting up Zope:
cPickle.UnpicklingError: unpickling stack underflow
The reason is that MySQLdb 1.2.1 tampers with the pickles whi
Hi Shane,
Well, it's already in the docs. Look for "1.2.1" in README.txt.
Doh - I was too fast.
I'll accept suggestions on how to reorganize the documentation to make
this more noticeable.
Well, it's actually quite clear as is, I realize. But a trouble shooting
section possible including
Last month I ask for help about hanging zeo clients. I promised to
follow up.
Dieter Maurer wrote:
Anton Stonor wrote at 2008-4-7 16:16 +0200:
We have a setup with a ZEO server and 4 ZEO clients.
During the last weeks we have seen almost daily deadlocks in some of the
ZEO clients. I&#x
One for the RelStorage issue tracker.
I've migrated a ~70Mb Data.fs to a Mysql backed RelStorage. Everything
seems to work fine.
Packing can be slow, though. With GC turned off, packing took a minute
or two. With GC turned on, it took many hours to complete.
While running the pack, the expe
Hi Shane,
The bug comments suggest wrapping the subquery in "select * from (...)"
to materialize the subquery only once. I've attached a patch that does
that. Let me know whether it helps or hurts. Note that this isn't the
final form of the patch since the other supported databases don't ne
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