Hi Geoffrey,
Thanks for the clear analysis of the likely issues and the
suggestions. My results are below.
On Sunday, March 31, 2002, at 7:36:09 PM, Geoffrey Talvola wrote:
GT> You're using the dynamic session store, right? Then the session
GT> gets pickled from memory to disk after 15 minutes of inactivity
GT> (by default; this is configurable using the
GT> 'DynamicSessionTimeout' setting). Then if someone accesses the
GT> session after between 15 and 60 minutes of inactivity, it will
GT> have to fetch the session back from disk into memory. That seems
GT> to be failing for some reason.
That makes a lot of sense.
GT> Do you get errors on startup if you stop and restart the
GT> appserver?
No. It seems to start up fine. However, if I try to use the same
browser to access the site after restarting the appserver, I get the
same problem.
I have found a way to repeat the error 100 percent of the time. I
have a login page; I log in, then I restart the appserver. Then I
reload the page. 100 percent of the time I get the error.
Furthermore, when stopping the appserver, I get the following error:
Shutdown Called Mon Apr 1 00:11:08 2002
ThreadedAppServer: Shutting Down
Shutting down the AppServer
Application is Shutting Down
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/local/lib/python2.2/threading.py", line 408, in __bootstrap
self.run()
File "/usr/local/lib/python2.2/threading.py", line 396, in run
apply(self.__target, self.__args, self.__kwargs)
File "./WebKit/AppServer.py", line 86, in closeThread
self.shutDown()
File "./WebKit/ThreadedAppServer.py", line 318, in shutDown
AppServer.shutDown(self)
File "./WebKit/AppServer.py", line 119, in shutDown
self._app.shutDown()
File "./WebKit/Application.py", line 236, in shutDown
self._sessions.storeAllSessions()
File "./WebKit/SessionDynamicStore.py", line 161, in storeAllSessions
self.MovetoFile(i)
File "./WebKit/SessionDynamicStore.py", line 145, in MovetoFile
self._fileStore[key] = self._memoryStore[key]
File "./WebKit/SessionFileStore.py", line 77, in __setitem__
self.encoder()(item, file)
UnpickleableError: Cannot pickle <type 'weakref'> objects
This also happens 100 percent of the time -- this exact error.
GT> That would indicate some type of pickling problem that doesn't
GT> show up with you are writing the session to disk, but shows up
GT> when you are _unpickling_ the session. Also, try switching
GT> temporarily to the File store. If there is a pickling problem,
GT> that should flush it out quickly.
You're right, I was using dynamic session store. When I switch to
File, I get the following error /every time/:
Traceback (most recent call last):
File "./WebKit/Application.py", line 388, in dispatchRequest
self.handleGoodURL(transaction)
File "./WebKit/Application.py", line 537, in handleGoodURL
self.sleep(transaction)
File "./WebKit/Application.py", line 718, in sleep
self._sessions.storeSession(transaction.session())
File "./WebKit/SessionFileStore.py", line 112, in storeSession
self[key] = session
File "./WebKit/SessionFileStore.py", line 77, in __setitem__
self.encoder()(item, file)
UnpickleableError: Cannot pickle <type 'weakref'> objects
GT> Another idea: go into SessionFileStore.py and remove the try/except around
GT> line 55. That was added recently in an attempt to handle pickling errors
GT> more gracefully, but in this case it may be obscuring the real problem.
When I do this, the code looks like:
51 # try:
52 item = self.decoder()(file)
53 # except:
54 # Corrupt data; pretend it doesn't exist
55 # raise KeyError, key
Then when I use the method described above to reproduce the error
(using the dynamic store again), I get a different error:
Traceback (most recent call last):
File "./WebKit/Application.py", line 368, in dispatchRequest
elif self.isSessionIdProblematic(request):
File "./WebKit/Application.py", line 466, in isSessionIdProblematic
if (time()-request.session().lastAccessTime()) >= request.session().timeout():
File "./WebKit/HTTPRequest.py", line 225, in session
return self._transaction.session()
File "./WebKit/Transaction.py", line 67, in session
self._session = self._application.createSessionForTransaction(self)
File "./WebKit/Application.py", line 889, in createSessionForTransaction
session = self.session(sessId)
File "./WebKit/Application.py", line 725, in session
return self._sessions[sessionId]
File "./WebKit/SessionDynamicStore.py", line 72, in __getitem__
self.MovetoMemory(key)
File "./WebKit/SessionDynamicStore.py", line 135, in MovetoMemory
self._memoryStore[key] = self._fileStore[key]
File "WebKit/SessionFileStore.py", line 52, in __getitem__
item = self.decoder()(file)
EOFError
Apparently the global except masked the EOFError above......
I think we're very close! Is there anything else I can do to assist?
--------------------------------------------------------------
Steven D. Arnold Neosynapse
[EMAIL PROTECTED] Managing Partner
AIM: abraxan MSN: [EMAIL PROTECTED]
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