Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
On 1/24/07, Maciej Wisniowski [EMAIL PROTECTED] wrote: Another question, do you use ZEO? I know there were some issues with _p_resolveConflict and ZEO (at last in Zope 2.8.x). Result was that with ZEO setup _p_resolveConflict was not called at all. There is solution for this but I don't know if this is your case especially that you are dealing with TemporaryStorage which is typically managed by ZEO Client... If ZEO cannot reach your product (import it), it cannot run any conflict resolution. Make sure that the ZEO server setup has access to those Products that do conflict resolution. -- Martijn Pieters ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
Is _p_resolveConflict method of Inceraser executed at all?
I wonder if traceback you see in console is from the
code you added:
traceback.print_exc(file=stdin)
or it is always shown when there is a conflict error.
code
def _p_resolveConflict(self, old, state1, state2):
print called the _p_resolveConflict of the Increaser object,self
try:
number = max(old,state1,state2)
except Exception,msg:
import traceback
traceback.print_exc(file=sys.stdin)
return max(old, state1, state2)
/code
Yes, The method was not called. However, the traceback was indeed printed by
the print_exc, since there were no tracebacks before I added this line. In
fact, as Gabriel Genellina said :
That might provoke a ConflictError, forcing a
transaction abort and the request to be re-tried (up to three times,
silently, then it goes logged).
as well as Pascal Peregrina:
In general, retry is called when a ZODB Conflict Error has happened.
If I remember well, Zope will silently retry 3 times, and then actually
return an error page showing the Conflict Error.
as the documentation says
http://www.zope.org/Documentation/Books/ZDG/current/ObjectPublishing.stx :
If an unhandled exception is raised during the publishing process, Zope
aborts the transaction. As detailed in Chapter 4. Zope handles
ConflictErrors by re-trying the request up to three times. This is done with
the zpublisher_exception_hook.
Thus, I don't think that the traceback is always shown when there's a
conflict error.
So I decided to look into the file suggested by Maciej Wisniowski :
You may take a look at lib/python/ZODB/ConflictResolution.py
method: tryToResolveConflict. There is a call to _p_resolveConflict.
and edited it like this :
code
def tryToResolveConflict(self, oid, committedSerial, oldSerial, newpickle,
committedData=''):
# class_tuple, old, committed, newstate = ('',''), 0, 0, 0
print in ConflictResolution.py, called the tryToResolveConflict method
with arguments :
print
self,self,oid,oid.__repr__(),committedSerial,committedSerial.__repr__(),oldSerial,oldSerial.__repr__(),newpickle,newpickle.__repr__(),committedData,committedData.__repr__()
try:
prfactory = PersistentReferenceFactory()
file = StringIO(newpickle)
unpickler = Unpickler(file)
unpickler.find_global = find_global
unpickler.persistent_load = prfactory.persistent_load
meta = unpickler.load()
if isinstance(meta, tuple):
klass = meta[0]
newargs = meta[1] or ()
if isinstance(klass, tuple):
klass = find_global(*klass)
else:
klass = meta
newargs = ()
if klass in _unresolvable:
print klass,klass.__repr__,is unresolvable
return None
newstate = unpickler.load()
inst = klass.__new__(klass, *newargs)
try:
resolve = inst._p_resolveConflict
except AttributeError:
print inst.__repr__,has no _p_resolveConflict method
_unresolvable[klass] = 1
return None
old = state(self, oid, oldSerial, prfactory)
committed = state(self, oid, committedSerial, prfactory,
committedData)
resolved = resolve(old, committed, newstate)
file = StringIO()
pickler = Pickler(file,1)
pickler.persistent_id = persistent_id
pickler.dump(meta)
pickler.dump(resolved)
print everything's ok
return file.getvalue(1)
except (ConflictError, BadClassName):
print ConflictError during conflict resolution in tryToResolveConflict,
ConflictResolution.py
import traceback
import sys
traceback.print_exc(file = sys.stdout)
return None
except:
print Exception raised in in tryToResolveConflict,
ConflictResolution.py
import traceback
import sys
traceback.print_exc(file=sys.stdout)
# If anything else went wrong, catch it here and avoid passing an
# arbitrary exception back to the client. The error here will mask
# the original ConflictError. A client can recover from a
# ConflictError, but not necessarily from other errors. But log
# the error so that any problems can be fixed.
logger.error(Unexpected error, exc_info=True)
return None
/code
Now let's see what's going on in the console :
console
in ConflictResolution.py, called the tryToResolveConflict method with
arguments :
self tempstorage.TemporaryStorage.TemporaryStorage instance at 0x43fb6aac
oid '\x00\x00\x00\x00\x00\x00\x00\t' committedSerial
'\x03k#\x93\x1d\xff\xf5\x11' oldSerial '\x03k#\x91^t\xf1D' newpickle '(
cProducts.Transience.Transience\nIncreaser\nq\x01)tq\x02.J\x88\xa6\xb8E.'
committedData ''
ConflictError during conflict resolution in tryToResolveConflict,
ConflictResolution.py
Traceback (most recent call last):
File /opt/aef/Zope-2.9.0/lib/python/ZODB/ConflictResolution.py, line
126, in tryToResolveConflict
old = state(self,
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
Concerning zeo, I do not use it in the developpement plateforme, but there's
one in the test and production platformes, so maybe I will face the problem
during the test phase.
I do not understand : session objects should be unique for each browser, so
why are there conflict errors on them ?
If ZEO cannot reach your product (import it), it cannot run any
conflict resolution. Make sure that the ZEO server setup has access to
those Products that do conflict resolution.
The product that does conflict resolution is the Transient object (I think
it is the session object) , which is Zope2.9.0/lib/python/Products/Transcience.
I think that zeo should see it.
2007/1/25, yacine chaouche [EMAIL PROTECTED]:
Is _p_resolveConflict method of Inceraser executed at all?
I wonder if traceback you see in console is from the
code you added:
traceback.print_exc(file=stdin)
or it is always shown when there is a conflict error.
code
def _p_resolveConflict(self, old, state1, state2):
print called the _p_resolveConflict of the Increaser object,self
try:
number = max(old,state1,state2)
except Exception,msg:
import traceback
traceback.print_exc(file=sys.stdin)
return max(old, state1, state2)
/code
Yes, The method was not called. However, the traceback was indeed printed
by the print_exc, since there were no tracebacks before I added this line.
In fact, as Gabriel Genellina said :
That might provoke a ConflictError, forcing a
transaction abort and the request to be re-tried (up to three times,
silently, then it goes logged).
as well as Pascal Peregrina:
In general, retry is called when a ZODB Conflict Error has happened.
If I remember well, Zope will silently retry 3 times, and then actually
return an error page showing the Conflict Error.
as the documentation says
http://www.zope.org/Documentation/Books/ZDG/current/ObjectPublishing.stx :
If an unhandled exception is raised during the publishing process, Zope
aborts the transaction. As detailed in Chapter 4. Zope handles
ConflictErrors by re-trying the request up to three times. This is done with
the zpublisher_exception_hook.
Thus, I don't think that the traceback is always shown when there's a
conflict error.
So I decided to look into the file suggested by Maciej Wisniowski :
You may take a look at lib/python/ZODB/ConflictResolution.py
method: tryToResolveConflict. There is a call to _p_resolveConflict.
and edited it like this :
code
def tryToResolveConflict(self, oid, committedSerial, oldSerial, newpickle,
committedData=''):
# class_tuple, old, committed, newstate = ('',''), 0, 0, 0
print in ConflictResolution.py, called the tryToResolveConflict
method with arguments :
print
self,self,oid,oid.__repr__(),committedSerial,committedSerial.__repr__(),oldSerial,oldSerial.__repr__(),newpickle,newpickle.__repr__(),committedData,committedData.__repr__()
try:
prfactory = PersistentReferenceFactory()
file = StringIO(newpickle)
unpickler = Unpickler(file)
unpickler.find_global = find_global
unpickler.persistent_load = prfactory.persistent_load
meta = unpickler.load()
if isinstance(meta, tuple):
klass = meta[0]
newargs = meta[1] or ()
if isinstance(klass, tuple):
klass = find_global(*klass)
else:
klass = meta
newargs = ()
if klass in _unresolvable:
print klass,klass.__repr__,is unresolvable
return None
newstate = unpickler.load()
inst = klass.__new__(klass, *newargs)
try:
resolve = inst._p_resolveConflict
except AttributeError:
print inst.__repr__,has no _p_resolveConflict method
_unresolvable[klass] = 1
return None
old = state(self, oid, oldSerial, prfactory)
committed = state(self, oid, committedSerial, prfactory,
committedData)
resolved = resolve(old, committed, newstate)
file = StringIO()
pickler = Pickler(file,1)
pickler.persistent_id = persistent_id
pickler.dump(meta)
pickler.dump(resolved)
print everything's ok
return file.getvalue(1)
except (ConflictError, BadClassName):
print ConflictError during conflict resolution in
tryToResolveConflict, ConflictResolution.py
import traceback
import sys
traceback.print_exc(file = sys.stdout)
return None
except:
print Exception raised in in tryToResolveConflict,
ConflictResolution.py
import traceback
import sys
traceback.print_exc(file=sys.stdout)
# If anything else went wrong, catch it here and avoid passing an
# arbitrary exception back to the client. The error here will
mask
# the original ConflictError. A client can recover from a
# ConflictError, but not necessarily from other errors. But log
# the error so that any
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
yacine chaouche wrote at 2007-1-24 18:23 +0100: As Gabriel Genellina said earlier in this discussion, the probleme could come from the dicoLignes variable that is stored in the session.I don't get it, the exception says that the Increaser object is responsible of the conflict error : ZODB.POSException.ConflictError database conflict error (oid 0x09, class Products.Transience.Transience.Increaser, serial this txn started with 0x036b192256c66688 2007-01-23 16:34:20.337891, serial currently committed 0x036b19236a4be0ee 2007-01-23 16:35:24.913219) But the Increaser class has a _p_resolveConflict method : In order to resolve a conflict, the storage must have sufficient history to deliver the old state. A TemporaryStorage has only a very limited history -- way to often not enough for conflict resolution. -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
As Gabriel Genellina said earlier in this discussion, the probleme could come from the dicoLignes variable that is stored in the session.I don't get it, the exception says that the Increaser object is responsible of the conflict error : ZODB.POSException.ConflictError database conflict error (oid 0x09, class Products.Transience.Transience.Increaser, serial this txn started with 0x036b192256c66688 2007-01-23 16:34:20.337891, serial currently committed 0x036b19236a4be0ee 2007-01-23 16:35:24.913219) But the Increaser class has a _p_resolveConflict method : code class Increaser(Persistent): A persistent object representing a typically increasing integer that has conflict resolution which uses the greatest integer out of the three available states. ... def _p_resolveConflict(self, old, state1, state2): return max(old, state1, state2) /code http://www.zope.org/Members/jim/ZODB/ApplicationLevelConflictResolution says : When a conflict is detected, then the database checks to see if the class of the object being saved defines the method, _p_resolveConflict. If the method is defined, then the method is called on the object. If the method succeeds, then the object change can be committed, otherwise a ConflictErroris raised as usual. But how can the simple instruction return max(old,state1,state2) not succeed ??!! anyway, i decided to rewrite it like this : code def _p_resolveConflict(self, old, state1, state2): try: number = max(old,state1,state2) except Exception,msg: import traceback traceback.print_exc(file=sys.stdin) return max(old, state1, state2) /code And still the same exception is raised ! traceback on the console exception raised in the publish module, in function publish Traceback (most recent call last): File /opt/aef/Zope-2.9.0/lib/python/ZPublisher/Publish.py, line 119, in publish transactions_manager.commit() File /opt/aef/Zope-2.9.0//lib/python/Zope2/App/startup.py, line 234, in commit transaction.commit() File /opt/aef/Zope-2.9.0//lib/python/transaction/_manager.py, line 96, in commit return self.get().commit(sub, deprecation_wng=False) File /opt/aef/Zope-2.9.0//lib/python/transaction/_transaction.py, line 380, in commit self._saveCommitishError() # This raises! File /opt/aef/Zope-2.9.0//lib/python/transaction/_transaction.py, line 378, in commit self._commitResources() File /opt/aef/Zope-2.9.0//lib/python/transaction/_transaction.py, line 433, in _commitResources rm.commit(self) File /opt/aef/Zope-2.9.0//lib/python/ZODB/Connection.py, line 484, in commit self._commit(transaction) File /opt/aef/Zope-2.9.0//lib/python/ZODB/Connection.py, line 526, in _commit self._store_objects(ObjectWriter(obj), transaction) File /opt/aef/Zope-2.9.0//lib/python/ZODB/Connection.py, line 554, in _store_objects s = self._storage.store(oid, serial, p, self._version, transaction) File /opt/aef/Zope-2.9.0//lib/python/tempstorage/TemporaryStorage.py, line 200, in store data=data) ConflictError: database conflict error (oid 0x09, class Products.Transience.Transience.Increaser, serial this txn started with 0x036b1eec70e150ee 2007-01-24 17:16:26.456283, serial currently committed 0x036b1eee46e27955 2007-01-24 17:18:16.613593) /traceback (i edited publish.py and added a traceback.print_exc(file=stdin) instruction in the beginning of the except block). Y.Chaouche 2007/1/23, Maciej Wisniowski [EMAIL PROTECTED]: And here is the exception that is raised: exception raised in the publish module, in function publish ZODB.POSException.ConflictError database conflict error (oid 0x09, class Products.Transience.Transience.Increaser, serial this txn started with 0x036b192256c66688 2007-01-23 16:34:20.337891, serial currently committed 0x036b19236a4be0ee 2007-01-23 16:35:24.913219) What happend ? Sorry for doing that but I'll send you to list archives. There were a lot of threads about conflict errors. I think you'll find them helpful. -- Maciej Wisniowski ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
But the Increaser class has a _p_resolveConflict method : (...) And still the same exception is raised ! Is _p_resolveConflict method of Inceraser executed at all? I wonder if traceback you see in console is from the code you added: traceback.print_exc(file=stdin) or it is always shown when there is a conflict error. Another question, do you use ZEO? I know there were some issues with _p_resolveConflict and ZEO (at last in Zope 2.8.x). Result was that with ZEO setup _p_resolveConflict was not called at all. There is solution for this but I don't know if this is your case especially that you are dealing with TemporaryStorage which is typically managed by ZEO Client... You may take a look at lib/python/ZODB/ConflictResolution.py method: tryToResolveConflict. There is a call to _p_resolveConflict. -- Maciej Wisniowski ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
Hello all,
From times to times, apparently randomly, I have the following uncaught
exception in the console :
2007-01-23 10:41:07 ERROR ZServer uncaptured python exception, closing
channel ZServer.HTTPServer.zhttp_channel connected 10.75.49.51:48177 at
0x44562e6c channel#: 140 requests: (socket.error:(104, 'Connection reset by
peer') [/opt/python2.4.2/lib/python2.4/asynchat.py|initiate_send|219]
[/opt/aef/Zope-2.9.0/lib/python/ZServer/medusa/http_server.py|send|417]
[/opt/python2.4.2/lib/python2.4/asyncore.py|send|332])
In addition, i have edited this file
:Zope-2.9.0/lib/python/ZPublisher/HTTPRequest.py
as follows :
code
def retry(self):
print retry called in HTTPRequest for the,self.retry_count,time
self.retry_count=self.retry_count+1
self.stdin.seek(0)
r=self.__class__(stdin=self.stdin,
environ=self._orig_env,
response=self.response.retry()
)
r.retry_count=self.retry_count
return r
/code
I only added a single print line to see if this method was called. And
indeed, it is ! Does anyone knows when (in what circumstances) this method
could be called ???
console trace
ip: 10.75.49.155 requests counting of lines 11 to 21
ip: 10.75.49.51 requests counting of lines 11 to 21
sending results to 10.75.49.155
sending results to 10.75.49.51
retry called in HTTPRequest for the 0 time
ip: 10.75.49.51 requests counting of lines 11 to 21
/console trace
Thanks.
Y.Chaouche
2007/1/19, yacine chaouche [EMAIL PROTECTED]:
It writes and reads objects in the session, maybe the probleme comes from
here ? Here's a little sinppet :
def toutCompter(self):
xmlrpc methode, called from a web borwser.
documentXML = ComptageXML()
#this reads and writes objects in the session
dicoLignes = self._fabriquerDicoLignes()
#do things with dicoLignes
for inumLigneCourante in xrange(borneInf,borneSup) :
snumLigneCourante = str(inumLigneCourante)
ligne = dicoLignes[snumLigneCourante][requete]
#do things here
self._ajouterAuDico(snumLigneCourante,ligne,comptage,arbre)
if ligne :
self._mettreEnSession(resultats)
response = self.REQUEST.RESPONSE
response.setHeader(Content-Type,text/xml)
response.setHeader (charset,utf-8)
chaineXML = documentXML.formatXML()
print sending results to +addresseIP
return chaineXML
def _fabriquerDicoLignes(self):
formulaire = self.getForm()
dicoLignes = self.getSession(self,dicoLignes) or {}
for key in formulaire.keys():
#do things...
self.setSession(dicoLignes, dicoLignes)
return dicoLignes
def _fabriquerListeLignes(self):
dicoLignes = RacineAbstraite.getSession(self,dicoLignes) or {}
listeNumeros = dicoLignes.keys()
listeNumeros.sort ( lambda x,y: cmp(int(x), int(y)) )
return [ dicoLignes[str(inumeroLigne)][requete] for inumeroLigne
in \
sorted( [int(snumeroLigne) for snumeroLigne in
dicoLignes.keys()] ) ]
def _ajouterAuDico(self,p_snumeroCle,p_ligne,p_comptage,p_arbre):
dicoLignes = RacineAbstraite.getSession(self,'dicoLignes') or {}
dicoLignes[p_snumeroCle] =
{'requete':p_ligne,'comptage':p_comptage,'arbre':p_arbre}
self.setSession('dicoLignes',dicoLignes)
def _mettreEnSession(self,p_resultats):
Mettre en session les résultats d'un comptage.
# Initialise de la SESSION
dicoResultatRecherche = {
'listeCriteres' : [self._fabriquerListeLignes(),
self.getForm('numeroLigne')],
'nombreEntreprises' : p_resultats[0][0],
'listeComptage' : p_resultats,
'listeEntreprises' : [],
}
#On conserve la requete et le resultat en session
self.setSession('resultatRecherche',
p_dicoResultatRecherche.copy())
When toutCompter is called by browser 1, then he will write and read, say,
the dicoLignes object in the session.
When toutCompter is called by browser 2 parallely, is it the same
dicoLignes object that it tries to access or another one is created ? can
there be conflicts somehow ?
Y.Chaouche
2007/1/19, yacine chaouche [EMAIL PROTECTED]:
I mean triple couples of lines of code.
2007/1/19, yacine chaouche [EMAIL PROTECTED]:
The toutCompter methode does a lot of thing and it would take a triple
couples of lines to describe what it does all.
Anyway, is there a way for me to detect ConflictErrors ? they don't
appear on the console so i guess they are catched.
Y.Chaouche
2007/1/19, Gabriel Genellina [EMAIL PROTECTED] :
At Thursday 18/1/2007 16:30, Andreas Jung wrote:
zope trace to the console
ip: 10.75.49.155 requests counting of lines 1 to 11
ip: 10.75.49.51 requests counting of lines 1 to 11
sending results to 10.75.49.155
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
From times to times, apparently randomly, I have the following uncaught exception in the console : 2007-01-23 10:41:07 ERROR ZServer uncaptured python exception, closing channel ZServer.HTTPServer.zhttp_channel connected 10.75.49.51:48177 http://10.75.49.51:48177 at 0x44562e6c channel#: 140 requests: (socket.error:(104, 'Connection reset by peer') [/opt/python2.4.2/lib/python2.4/asynchat.py|initiate_send|219] [/opt/aef/Zope- 2.9.0/lib/python/ZServer/medusa/http_server.py|send|417] [/opt/python2.4.2/lib/python2.4/asyncore.py|send|332]) This means that when Zope was sending a response to the browser, user pressed a 'Stop' button in browser, closed browser tab/window etc. Nothing to worry about. -- Maciej Wisniowski ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
Got it ! I edited this file : Zope-2.9.0/lib/python/ZPublisher/Publish.py and added a print line in the publish function, at the beginning of the first except block : code def publish(request, module_name, after_list, debug=0,...): ... try: request.processInputs() request_get=request.get response=request.response ... except: print exception raised in the publish module, in function publish, sys.exc_type,sys.exc_value # DM: provide nicer error message for FTP sm = None if response is not None: sm = getattr(response, setMessage, None) ... /code print exception raised in the publish module, in function publish, sys.exc_type,sys.exc_value /code And here is the exception that is raised: exception raised in the publish module, in function publish ZODB.POSException.ConflictError database conflict error (oid 0x09, class Products.Transience.Transience.Increaser, serial this txn started with 0x036b192256c66688 2007-01-23 16:34:20.337891, serial currently committed 0x036b19236a4be0ee 2007-01-23 16:35:24.913219) What happend ? Y.Chaouche 2007/1/23, Maciej Wisniowski [EMAIL PROTECTED]: From times to times, apparently randomly, I have the following uncaught exception in the console : 2007-01-23 10:41:07 ERROR ZServer uncaptured python exception, closing channel ZServer.HTTPServer.zhttp_channel connected 10.75.49.51:48177 http://10.75.49.51:48177 at 0x44562e6c channel#: 140 requests: (socket.error:(104, 'Connection reset by peer') [/opt/python2.4.2/lib/python2.4/asynchat.py|initiate_send|219] [/opt/aef/Zope- 2.9.0/lib/python/ZServer/medusa/http_server.py|send|417] [/opt/python2.4.2/lib/python2.4/asyncore.py|send|332]) This means that when Zope was sending a response to the browser, user pressed a 'Stop' button in browser, closed browser tab/window etc. Nothing to worry about. -- Maciej Wisniowski ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
And here is the exception that is raised: exception raised in the publish module, in function publish ZODB.POSException.ConflictError database conflict error (oid 0x09, class Products.Transience.Transience.Increaser, serial this txn started with 0x036b192256c66688 2007-01-23 16:34:20.337891, serial currently committed 0x036b19236a4be0ee 2007-01-23 16:35:24.913219) What happend ? Sorry for doing that but I'll send you to list archives. There were a lot of threads about conflict errors. I think you'll find them helpful. -- Maciej Wisniowski ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
The toutCompter methode does a lot of thing and it would take a triple couples of lines to describe what it does all. Anyway, is there a way for me to detect ConflictErrors ? they don't appear on the console so i guess they are catched. Y.Chaouche 2007/1/19, Gabriel Genellina [EMAIL PROTECTED]: At Thursday 18/1/2007 16:30, Andreas Jung wrote: zope trace to the console ip: 10.75.49.155 requests counting of lines 1 to 11 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.155 sending results to 10.75.49.51 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.51 /zope trace Zope says he got 2 requests form 10.75.49.51 and sent it the results 2 times. Ok, let's check the tcpflow then for these supposed connections : [...] Allright, there is only ONE POST request. So zope didnt really got two requests. Now let's see if it sent the data two times as it presumes : [...] The results were sent just one time, not two. What is going on here ? What does the toutCompter method really does? Does it modify some object state? That might provoke a ConflictError, forcing a transaction abort and the request to be re-tried (up to three times, silently, then it goes logged). -- Gabriel Genellina Softlab SRL __ Preguntá. Respondé. Descubrí. Todo lo que querías saber, y lo que ni imaginabas, está en Yahoo! Respuestas (Beta). ¡Probalo ya! http://www.yahoo.com.ar/respuestas ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
I mean triple couples of lines of code. 2007/1/19, yacine chaouche [EMAIL PROTECTED]: The toutCompter methode does a lot of thing and it would take a triple couples of lines to describe what it does all. Anyway, is there a way for me to detect ConflictErrors ? they don't appear on the console so i guess they are catched. Y.Chaouche 2007/1/19, Gabriel Genellina [EMAIL PROTECTED]: At Thursday 18/1/2007 16:30, Andreas Jung wrote: zope trace to the console ip: 10.75.49.155 requests counting of lines 1 to 11 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.155 sending results to 10.75.49.51 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.51 /zope trace Zope says he got 2 requests form 10.75.49.51 and sent it the results 2 times. Ok, let's check the tcpflow then for these supposed connections : [...] Allright, there is only ONE POST request. So zope didnt really got two requests. Now let's see if it sent the data two times as it presumes : [...] The results were sent just one time, not two. What is going on here ? What does the toutCompter method really does? Does it modify some object state? That might provoke a ConflictError, forcing a transaction abort and the request to be re-tried (up to three times, silently, then it goes logged). -- Gabriel Genellina Softlab SRL __ Preguntá. Respondé. Descubrí. Todo lo que querías saber, y lo que ni imaginabas, está en Yahoo! Respuestas (Beta). ¡Probalo ya! http://www.yahoo.com.ar/respuestas ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
Please keep the discussion on the list and don't try to address helpdesk requests to individuals. -aj Forwarded Message Date: 18. Januar 2007 19:05:28 +0100 From: yacine chaouche [EMAIL PROTECTED] To: Andreas Jung [EMAIL PROTECTED] Subject: Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! 2007/1/18, Andreas Jung [EMAIL PROTECTED]: --On 18. Januar 2007 16:40:02 +0100 Patrick Gerken [EMAIL PROTECTED] w instead of strace try tcpdump, much more helpful: tcpdump -i INTERFACE -s 0 -A HOST HOST AND PORT PORT should show the reality tcpflow is much nicer and show the HTTP traffic in a decoded way. -aj Thank you Andreas for showing me this nice tool which is tcpflow. Thanks to it, I am now sure that the probleme is coming from zope. Would you take a look at this : [EMAIL PROTECTED]:~/HTTPCONNECTIONS# tcpflow host 10.75.49.100 and port 8081 tcpflow[20104]: listening on eth0 The tcpflow is run on the 10.75.49.51 machine, the one that zope thinks it sends two times the XMLRPC query. 10.75.49.100 is the server that runs zope. Now i click on the button, on both browsers (remember they are on different machines), invoking the method toutCompter via xmlhttprequest, and wait for zope to complete the requests : zope trace to the console ip: 10.75.49.155 requests counting of lines 1 to 11 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.155 sending results to 10.75.49.51 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.51 /zope trace Zope says he got 2 requests form 10.75.49.51 and sent it the results 2 times. Ok, let's check the tcpflow then for these supposed connections : [EMAIL PROTECTED]:~/HTTPCONNECTIONS# ls total 8,0K -rw-r--r-- 1 root root 873 2007-01-18 18:52 010.075.049.051.41131-010.075.049.100.08081 -rw-r--r-- 1 root root 607 2007-01-18 18:53 010.075.049.100.08081-010.075.049.051.41131 Allright, first file (machine to server): [EMAIL PROTECTED]:~/HTTPCONNECTIONS# cat 010.075.049.051.41131-010.075.049.100.08081 POST /aef/rechercheMultiligne/toutCompter HTTP/1.1 Host: 10.75.49.100:8081 User-Agent: Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.8.1) Gecko/20061010 Firefox/2.0 Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9 ,text/plain;q=0.8,image/png,*/*;q=0.5 Accept-Language: fr,en-us;q=0.7,en;q=0.3 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-15,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive Content-Type: application/x-www-form-urlencoded Referer: http://10.75.49.100:8081/aef/rechercheMultiligne Content-Length: 224 Cookie: _ZopeId=58653529A2r8NuahgXc Pragma: no-cache Cache-Control: no-cache requete_1=ape%2012*requete_2=ape%2012*requete_3=ape%2012*requete_4=ape%2 012*requete_5=ape%2012*requete_6=ape%2012*requete_7=ape%2012*requete_8= ape%2012*requete_9=ape%2012*requete_10=ape%2012*borneInf=0borneSup= 10[EMAIL PROTECTED]:~/HTTPCONNECTIONS# Allright, there is only ONE POST request. So zope didnt really got two requests. Now let's see if it sent the data two times as it presumes : [EMAIL PROTECTED]:~/HTTPCONNECTIONS# cat 010.075.049.100.08081-010.075.049.051.41131 HTTP/1.1 200 OK Server: Zope/(Zope 2.9.0-, python 2.4.2, linux2) ZServer/1.1 Date: Thu, 18 Jan 2007 17:51:42 GMT Content-Length: 413 Charset: utf-8 Content-Type: text/xml; charset=utf-8 ?xml version=1.0 encoding=utf-8 ?comptagescomptage numLigne=13/comptagecomptage numLigne=23/comptagecomptage numLigne=33/comptagecomptage numLigne=43/comptagecomptage numLigne=53/comptagecomptage numLigne=63/comptagecomptage numLigne=73/comptagecomptage numLigne=83/comptagecomptage numLigne=93/comptagecomptage numLigne=103/comptage/comptages [EMAIL PROTECTED]:~/HTTPCONNECTIONS# The results were sent just one time, not two. What is going on here ? Any comment would be really appreciated. Thanks, Y.Chaouche -- End Forwarded Message -- -- ZOPYX Ltd. Co. KG - Charlottenstr. 37/1 - 72070 Tübingen - Germany Web: www.zopyx.com - Email: [EMAIL PROTECTED] - Phone +49 - 7071 - 793376 E-Publishing, Python, Zope Plone development, Consulting pgp0J4BBfvb5L.pgp Description: PGP signature ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope pretends to receive and send XMLRPC data, but strace sees nothing ! (fwd)
At Thursday 18/1/2007 16:30, Andreas Jung wrote: zope trace to the console ip: 10.75.49.155 requests counting of lines 1 to 11 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.155 sending results to 10.75.49.51 ip: 10.75.49.51 requests counting of lines 1 to 11 sending results to 10.75.49.51 /zope trace Zope says he got 2 requests form 10.75.49.51 and sent it the results 2 times. Ok, let's check the tcpflow then for these supposed connections : [...] Allright, there is only ONE POST request. So zope didnt really got two requests. Now let's see if it sent the data two times as it presumes : [...] The results were sent just one time, not two. What is going on here ? What does the toutCompter method really does? Does it modify some object state? That might provoke a ConflictError, forcing a transaction abort and the request to be re-tried (up to three times, silently, then it goes logged). -- Gabriel Genellina Softlab SRL __ Preguntá. Respondé. Descubrí. Todo lo que querías saber, y lo que ni imaginabas, está en Yahoo! Respuestas (Beta). ¡Probalo ya! http://www.yahoo.com.ar/respuestas ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
