[Zope] MemoryError that brings my zope to its knees

[Calvin Hendryx-Parker]

In the last month I have started to get these errors using Zope 2.7.7 in 
a ZEO configuration with one client and one storage server:

------
2005-09-12T23:46:07 ERROR(200) ZODB Couldn't load state for 0x055ba7
Traceback (most recent call last):
   File "/usr/local/Zope/lib/python/ZODB/Connection.py", line 600, in 
setstate
     self._set_ghost_state(obj, p)
   File "/usr/local/Zope/lib/python/ZODB/Connection.py", line 639, in 
_set_ghost_state
     state = unpickler.load()
MemoryError
------
2005-09-12T23:46:07 ERROR(200) SiteError Error while logging
Traceback (most recent call last):
   File 
"/usr/local/Zope/lib/python/Products/SiteErrorLog/SiteErrorLog.py", line 
142, in raising
     tb_text = ''.join(
MemoryError


Sometimes I see this too:

------
2005-09-06T15:23:30 ERROR(200) ZServer uncaptured python exception, 
closing channel <select-trigger (pipe) at bd9104c> 
(exceptions.MemoryError: [/usr/local/lib/python2.3/asyncore.py|read|69] 
[/usr/local/lib/python2.3/asyncore.py|handle_read_event|390] 
[/usr/local/Zope/lib/python/ZServer/medusa/thread/select_trigger.py|handle_read|77] 
[/usr/local/lib/python2.3/asyncore.py|recv|342] 
[/usr/local/lib/python2.3/asyncore.py|recv|523])

And this one also brings the show down:

------
2005-09-06T05:35:51 ERROR(200) zrpc:30832 can't decode message: 
"(M2'K\x00U\x06.reply(TW\x00\x01\x00((U\tOFS.Imageq\x01U..."
------
2005-09-06T05:35:51 ERROR(200) zrpc-conn(C):localhost:6100 Error caught 
in asyncore
Traceback (most recent call last):
   File "/usr/local/lib/python2.3/asyncore.py", line 69, in read
     obj.handle_read_event()
   File "/usr/local/lib/python2.3/asyncore.py", line 390, in 
handle_read_event
     self.handle_read()
   File "/usr/local/Zope/lib/python/ZEO/zrpc/smac.py", line 217, in 
handle_read
     self.message_input(msg)
   File "/usr/local/Zope/lib/python/ZEO/zrpc/connection.py", line 339, 
in message_input
     msgid, flags, name, args = self.marshal.decode(message)
   File "/usr/local/Zope/lib/python/ZEO/zrpc/marshal.py", line 39, in decode
     return unpickler.load() # msgid, flags, name, args
MemoryError

It completely locks up the zope until I restart.  I added more RAM to 
the box and also bumped up the zeo cache-size to 100MB and 10000 objects 
in the zope.conf.  I also changed over from binding to an external 
ethernet interface and bound the zeo stuff to the localhost interface.

Any ideas on other things I could try?

Thanks,
Calvin

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