id,summary,reporter,owner,description,type,status,component,version,severity,resolution,keywords,cc,stage,has_patch,needs_docs,needs_tests,needs_better_patch,easy,ui_ux 9400,flock causes problems when writing to an NFS share,mikeh,nobody,"Hi, This seems to be the same behaviour as reported in #8403, but as that ticket has been closed as there was a request not to reopen it, here's a new ticket. We have a media directory mounted over NFS. Our system is RHEL5.2, Python 2.4, Django-1.0. Saving a file through the standard FileField mechanisms (we're not using any custom storage backends, just out of the box django setup stuff) results in the following : {{{ File ""/usr/lib64/python2.4/site-packages/mod_python/apache.py"", line 299, in HandlerDispatch? result = object(req) File ""/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py"", line 222, in handler return ModPythonHandler?()(req) File ""/usr/lib/python2.4/site-packages/django/core/handlers/modpython.py"", line 195, in call response = self.get_response(request) File ""/usr/lib/python2.4/site-packages/django/core/handlers/base.py"", line 128, in get_response return self.handle_uncaught_exception(request, resolver, exc_info) File ""./../apps/dave_common/init.py"", line 20, in new File ""/usr/lib/python2.4/site-packages/django/core/handlers/base.py"", line 86, in get_response response = callback(request, *callback_args, **callback_kwargs) File ""/usr/lib/python2.4/site-packages/django/contrib/admin/sites.py"", line 158, in root return self.model_page(request, *url.split('/', 2)) File ""/usr/lib/python2.4/site-packages/django/views/decorators/cache.py"", line 44, in _wrapped_view_func response = view_func(request, *args, **kwargs) File ""/usr/lib/python2.4/site-packages/django/contrib/admin/sites.py"", line 177, in model_page return admin_obj(request, rest_of_url) File ""/usr/lib/python2.4/site-packages/django/contrib/admin/options.py"", line 191, in call return self.add_view(request) File ""/usr/lib/python2.4/site-packages/django/db/transaction.py"", line 238, in _commit_on_success res = func(*args, **kw) File ""/usr/lib/python2.4/site-packages/django/contrib/admin/options.py"", line 492, in add_view new_object = self.save_form(request, form, change=False) File ""/usr/lib/python2.4/site-packages/django/contrib/admin/options.py"", line 370, in save_form return form.save(commit=False) File ""/usr/lib/python2.4/site-packages/django/forms/models.py"", line 302, in save return save_instance(self, self.instance, self._meta.fields, fail_message, commit) File ""/usr/lib/python2.4/site-packages/django/forms/models.py"", line 47, in save_instance f.save_form_data(instance, cleaned_data[f.name]) File ""/usr/lib/python2.4/site-packages/django/db/models/fields/files.py"", line 192, in save_form_data getattr(instance, self.name).save(data.name, data, save=False) File ""/usr/lib/python2.4/site-packages/django/db/models/fields/files.py"", line 217, in save super(ImageFieldFile?, self).save(name, content, save) File ""/usr/lib/python2.4/site-packages/django/db/models/fields/files.py"", line 74, in save self._name = self.storage.save(name, content) File ""/usr/lib/python2.4/site-packages/django/core/files/storage.py"", line 45, in save name = self._save(name, content) File ""/usr/lib/python2.4/site-packages/django/core/files/storage.py"", line 159, in _save locks.lock(fd, locks.LOCK_EX) File ""/usr/lib/python2.4/site-packages/django/core/files/locks.py"", line 57, in lock fcntl.lockf(fd(file), flags) IOError: [Errno 37] No locks available }}} The default with RHEL5.2 is NFSv3, and that's what we're using. Cheers, Mike",Bug,closed,File uploads/storage,1.0,Normal,worksforme,,,Design decision needed,0,0,0,0,0,0