Hi, this is nasty. We detected a couple of hangs with a Zope 2.7.7 final and (using the DeadlockDebugger) we found this situation in every of the four threads: (See attached file for complete listing of all threads)
Threads traceback dump at 2005-10-05 14:14:07
Thread 16386 (GET
/psdsite/psd/niProductGroupsContainer/5/psdsite/vendoOrderItem.gif):
File "/home/bpm/zope/lib/python/ZServer/PubCore/ZServerPublisher.py", line
23, in __init__
response=response)
File "/home/bpm/instance/Products/ZopeProfiler/MonkeyPatcher.py", line 35, in
__call__
return self._function(*args,**kw)
File "/home/bpm/instance/Products/ZopeProfiler/ZopeProfiler.py", line 352, in
_profilePublishModule
request=request, response=response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 384, in
publish_module
environ, debug, request, response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 175, in
publish_module_standard
response = publish(request, module_name, after_list, debug=debug)
File
"/home/bpm/instance/Products/PlacelessTranslationService/PatchStringIO.py",
line 51, in new_publish
x = Publish.old_publish(request, module_name, after_list, debug)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 107, in publish
transactions_manager.commit()
File "/home/bpm/zope/lib/python/Zope/App/startup.py", line 222, in commit
get_transaction().commit()
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 240, in commit
self._commit_begin(jars, subjars, subtransaction)
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 348, in
_commit_begin
jar.tpc_begin(self)
File "/home/bpm/zope/lib/python/ZODB/Connection.py", line 729, in tpc_begin
self._storage.tpc_begin(transaction)
File "/home/bpm/zope/lib/python/ZODB/BaseStorage.py", line 163, in tpc_begin
self._commit_lock_acquire()
We then looked at the locks in BaseStorage, and what I found is that in
tpc_finish, the commit_lock
will be freed in any case (using a finally clause) whereas in tpc_abort, there
might be a race condition
that does not free the commit_lock. (the finally clause only covers a second,
different lock).
Additionally, we are using Ape running on a postgres backend, so this might
trigger
some unusual side effects, maybe this possible race condition.
(If someone has another suspicion where this hang might come from, I'm all
your's to listen)
Best regards,
Christian
--
gocept gmbh & co. kg - schalaunische str. 6 - 06366 koethen - germany
www.gocept.com - [EMAIL PROTECTED] - phone +49 3496 30 99 112 -
fax +49 3496 30 99 118 - zope and plone consulting and development
Threads traceback dump at 2005-10-05 14:14:07
Thread 16386 (GET
/psdsite/psd/niProductGroupsContainer/5/psdsite/vendoOrderItem.gif):
File "/home/bpm/zope/lib/python/ZServer/PubCore/ZServerPublisher.py", line
23, in __init__
response=response)
File "/home/bpm/instance/Products/ZopeProfiler/MonkeyPatcher.py", line 35, in
__call__
return self._function(*args,**kw)
File "/home/bpm/instance/Products/ZopeProfiler/ZopeProfiler.py", line 352, in
_profilePublishModule
request=request, response=response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 384, in
publish_module
environ, debug, request, response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 175, in
publish_module_standard
response = publish(request, module_name, after_list, debug=debug)
File
"/home/bpm/instance/Products/PlacelessTranslationService/PatchStringIO.py",
line 51, in new_publish
x = Publish.old_publish(request, module_name, after_list, debug)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 107, in publish
transactions_manager.commit()
File "/home/bpm/zope/lib/python/Zope/App/startup.py", line 222, in commit
get_transaction().commit()
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 240, in commit
self._commit_begin(jars, subjars, subtransaction)
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 348, in
_commit_begin
jar.tpc_begin(self)
File "/home/bpm/zope/lib/python/ZODB/Connection.py", line 729, in tpc_begin
self._storage.tpc_begin(transaction)
File "/home/bpm/zope/lib/python/ZODB/BaseStorage.py", line 163, in tpc_begin
self._commit_lock_acquire()
Thread 32771 (GET
/psdsite/psd/niProductGroupsContainer/5/psdsite/vendoOrder.gif):
File "/home/bpm/zope/lib/python/ZServer/PubCore/ZServerPublisher.py", line
23, in __init__
response=response)
File "/home/bpm/instance/Products/ZopeProfiler/MonkeyPatcher.py", line 35, in
__call__
return self._function(*args,**kw)
File "/home/bpm/instance/Products/ZopeProfiler/ZopeProfiler.py", line 352, in
_profilePublishModule
request=request, response=response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 384, in
publish_module
environ, debug, request, response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 175, in
publish_module_standard
response = publish(request, module_name, after_list, debug=debug)
File
"/home/bpm/instance/Products/PlacelessTranslationService/PatchStringIO.py",
line 51, in new_publish
x = Publish.old_publish(request, module_name, after_list, debug)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 107, in publish
transactions_manager.commit()
File "/home/bpm/zope/lib/python/Zope/App/startup.py", line 222, in commit
get_transaction().commit()
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 240, in commit
self._commit_begin(jars, subjars, subtransaction)
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 348, in
_commit_begin
jar.tpc_begin(self)
File "/home/bpm/zope/lib/python/ZODB/Connection.py", line 729, in tpc_begin
self._storage.tpc_begin(transaction)
File "/home/bpm/zope/lib/python/ZODB/BaseStorage.py", line 163, in tpc_begin
self._commit_lock_acquire()
Thread 49156 (GET
/psdsite/psd/niProductGroupsContainer/5/497/psdcontainer_view):
File "/home/bpm/zope/lib/python/ZServer/PubCore/ZServerPublisher.py", line
23, in __init__
response=response)
File "/home/bpm/instance/Products/ZopeProfiler/MonkeyPatcher.py", line 35, in
__call__
return self._function(*args,**kw)
File "/home/bpm/instance/Products/ZopeProfiler/ZopeProfiler.py", line 352, in
_profilePublishModule
request=request, response=response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 384, in
publish_module
environ, debug, request, response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 175, in
publish_module_standard
response = publish(request, module_name, after_list, debug=debug)
File
"/home/bpm/instance/Products/PlacelessTranslationService/PatchStringIO.py",
line 51, in new_publish
x = Publish.old_publish(request, module_name, after_list, debug)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 107, in publish
transactions_manager.commit()
File "/home/bpm/zope/lib/python/Zope/App/startup.py", line 222, in commit
get_transaction().commit()
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 240, in commit
self._commit_begin(jars, subjars, subtransaction)
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 348, in
_commit_begin
jar.tpc_begin(self)
File "/home/bpm/zope/lib/python/ZODB/Connection.py", line 729, in tpc_begin
self._storage.tpc_begin(transaction)
File "/home/bpm/zope/lib/python/ZODB/BaseStorage.py", line 163, in tpc_begin
self._commit_lock_acquire()
Thread 65541 (GET
/psdsite/psd/niProductGroupsContainer/5/psdsite/folder_icon.gif):
File "/home/bpm/zope/lib/python/ZServer/PubCore/ZServerPublisher.py", line
23, in __init__
response=response)
File "/home/bpm/instance/Products/ZopeProfiler/MonkeyPatcher.py", line 35, in
__call__
return self._function(*args,**kw)
File "/home/bpm/instance/Products/ZopeProfiler/ZopeProfiler.py", line 352, in
_profilePublishModule
request=request, response=response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 384, in
publish_module
environ, debug, request, response)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 175, in
publish_module_standard
response = publish(request, module_name, after_list, debug=debug)
File
"/home/bpm/instance/Products/PlacelessTranslationService/PatchStringIO.py",
line 51, in new_publish
x = Publish.old_publish(request, module_name, after_list, debug)
File "/home/bpm/zope/lib/python/ZPublisher/Publish.py", line 107, in publish
transactions_manager.commit()
File "/home/bpm/zope/lib/python/Zope/App/startup.py", line 222, in commit
get_transaction().commit()
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 240, in commit
self._commit_begin(jars, subjars, subtransaction)
File "/home/bpm/zope/lib/python/ZODB/Transaction.py", line 348, in
_commit_begin
jar.tpc_begin(self)
File "/home/bpm/zope/lib/python/ZODB/Connection.py", line 729, in tpc_begin
self._storage.tpc_begin(transaction)
File "/home/bpm/zope/lib/python/ZODB/BaseStorage.py", line 163, in tpc_begin
self._commit_lock_acquire()
End of dump
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