2.4.7 problems

[BlueShadow]

Hi,
I updated to the newest version of web2py and I got at least to problems:
there is no client cache funktion anymore.
the second one:
I get an error when I create a cached version of a page:

@auth.requires_membership('VIP')
@cache("Ertrag", time_expire=86400, cache_model=cache.disk)
def Ertrag():
    Liste=getvaluesfromDB(db)
    Liste=Sortvalues(Liste)
    return response.render(Liste=Liste)

returns this error

<type 'exceptions.RuntimeError'> unable to create/re-create cache file F:\Website\web2py\applications\Prolog\cache\cache.shelve

Version

web2py™	Version 2.4.7-stable+timestamp.2013.05.24.17.48.47
Python	Python 2.7.4: C:\Python27\python.exe (prefix: C:\Python27)

Traceback

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16.

Traceback (most recent call last): File "F:\Website\web2py\gluon\restricted.py", line 212, in restricted exec ccode in environment File "F:/Website/web2py/applications/Prolog/controllers/default.py", line 188, in <module> File "F:\Website\web2py\gluon\globals.py", line 194, in <lambda> self._caller = lambda f: f() File "F:\Website\web2py\gluon\tools.py", line 3021, in f return action(*a, **b) File "F:\Website\web2py\gluon\cache.py", line 402, in __call__ self.time_expire) File "F:\Website\web2py\gluon\cache.py", line 347, in __call__ storage = self._open_shelve_and_lock() File "F:\Website\web2py\gluon\cache.py", line 299, in _open_shelve_and_lock 'unable to create/re-create cache file %s' % self.shelve_name) RuntimeError: unable to create/re-create cache file F:\Website\web2py\applications\Prolog\cache\cache.shelve

Error snapshot

<type 'exceptions.RuntimeError'>(unable to create/re-create cache file F:\Website\web2py\applications\Prolog\cache\cache.shelve)

inspect attributes

Atribute der Ausnahmeinstanz

args	(r'unable to create/re-create cache file F:\Website\web2py\applications\Prolog\cache\cache.shelve',)
__setattr__	<method-wrapper '__setattr__' of exceptions.RuntimeError object>
__reduce_ex__	<built-in method __reduce_ex__ of exceptions.RuntimeError object>
__getslice__	<method-wrapper '__getslice__' of exceptions.RuntimeError object>
__getitem__	<method-wrapper '__getitem__' of exceptions.RuntimeError object>
__setstate__	<built-in method __setstate__ of exceptions.RuntimeError object>
__getattribute__	<method-wrapper '__getattribute__' of exceptions.RuntimeError object>
__str__	<method-wrapper '__str__' of exceptions.RuntimeError object>
__format__	<built-in method __format__ of exceptions.RuntimeError object>
__reduce__	<built-in method __reduce__ of exceptions.RuntimeError object>
__class__	<type 'exceptions.RuntimeError'>
__dict__	{}
__delattr__	<method-wrapper '__delattr__' of exceptions.RuntimeError object>
__subclasshook__	<built-in method __subclasshook__ of type object>
__repr__	<method-wrapper '__repr__' of exceptions.RuntimeError object>
__init__	<method-wrapper '__init__' of exceptions.RuntimeError object>
__hash__	<method-wrapper '__hash__' of exceptions.RuntimeError object>
__sizeof__	<built-in method __sizeof__ of exceptions.RuntimeError object>
__doc__	'Unspecified run-time error.'
__unicode__	<built-in method __unicode__ of exceptions.RuntimeError object>
__new__	<built-in method __new__ of type object> ...default.py http://..../[app]/default/data/update/[table]/[id] http://..../[app]/default/data/delete/[table]/[id] http://..../[app]/default/data/select/[table] http://..../[app]/default/data/search/[table] but URLs must be signed, i.e. linked with A('table',_href=URL('data/tables',user_signature=True)) or with the signed load operator LOAD('default','data.load',args='tables',ajax=True,user_signature=True) """ return dict(form=crud(),nsb=1)

[Niphlod]

cache.client was experimental. it was renamed to cache.action

As for the second error, try to delete the cache/ directory

[BlueShadow]

deleting the cache directory has no effekt.
any other ideas?

[BlueShadow]

I just changet it from cache.disk to cache.ram and it works but I would prefer to put it on the disk and not to the ram.

[Niphlod]

I tried with cache.disk and no error occurred.
Are you positive that there are no permission issues on the cache folder ?

[BlueShadow]

I just rechecked it the standard www-data user is the owner of the folder and its content.

[Marian]

I can confirm the exception, on my local developement system the created cache.shelve has no owner and so it is not readable/writeable by the current sys user. When I create an empty cache.shelve by myself it seems to work.

[LightDot]

If it's a linux system, it must have an owner. Perhaps it's just called "nobody", or is it a nonexisting user, or...?

Could you please describe how do you start web2py, under which user accounts, etc. etc.

Regards,
Ales

On Thursday, May 30, 2013 9:43:28 AM UTC+2, Marian wrote:

I can confirm the exception, on my local developement system the created cache.shelve has no owner and so it is not readable/writeable by the current sys user. When I create an empty cache.shelve by myself it seems to work.
 
On Wednesday, May 29, 2013 12:28:35 PM UTC+2, BlueShadow wrote:

[Kevin Bethke]

I used the standard web2py-ubuntu-nginx install so www-user should be the right one. but I got that user and full access to the cache folder for everyone. drwxrwxrwx

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[Niphlod]

ehm ? I thought the problem was on windows ! :D

[Marian]

My local development system is windows 7 with the build in rocket server, my test server is a IIS 7 running with isapi_wsgi.

On both, the cache.shelve created by web2py has no owner.

[Kevin Bethke]

for me its on both local development(windows) and server(ubuntu)

On Thu, May 30, 2013 at 1:10 PM, Marian <scor...@gmx.net> wrote:

My local development system is windows 7 width the build in rocket server, my test server is a IIS 7 running with isapi_wsgi.

On both, the cache.shelve created by web2py has no owner.

On Thursday, May 30, 2013 12:41:12 PM UTC+2, LightDot wrote:

--

[sherdim]

The source of the problem is in the gluon/cache.py

When I have revert this only file to the version of 2012-09-18 - cache.disk is working again

below the method from that file, which have became errorous in the last versions:

def _open_shelf_with_lock(self):
        """Open and return a shelf object, obtaining an exclusive lock
        on self.locker first. Replaces the close method of the
        returned shelf instance with one that releases the lock upon
        closing."""
        def _close(self):
            try:
                shelve.Shelf.close(self)
            finally:
                portalocker.unlock(self.locker)
                self.locker.close()

        storage, locker, locker_locked = None, None, False
        try:
            locker = open(self.locker_name, 'a')
            portalocker.lock(locker, portalocker.LOCK_EX)
            locker_locked = True
            storage = shelve.open(self.shelve_name)
            storage.close = _close.__get__(storage, shelve.Shelf)
            storage.locker = locker
        except Exception:
            logger.error('corrupted cache file %s, will try to delete and recreate it!' % (self.shelve_name))
            if storage:
                storage.close()
                storage = None

            try:
                os.unlink(self.shelve_name)
                storage = shelve.open(self.shelve_name)
                storage.close = _close.__get__(storage, shelve.Shelf)
                storage.locker = locker
                if not CacheAbstract.cache_stats_name in storage.keys():
                    storage[CacheAbstract.cache_stats_name] = {
                        'hit_total': 0,
                        'misses': 0,
                    }
                storage.sync()
            except (IOError, OSError):
                logger.warn('unable to delete and recreate cache file %s' % self.shelve_name)
                if storage:
                        storage.close()
                        storage = None
                if locker_locked:
                    portalocker.unlock(locker)
                if locker:
                    locker.close()
        return storage

[Massimo Di Pierro]

Please open a ticket about this.

[Mark Li]

I've just encountered this problem myself, and I opened a ticket about this since I couldn't find one already posted.

http://code.google.com/p/web2py/issues/detail?id=1736&thanks=1736&ts=1382314136

[Arglanir]

Hello everyone,

I encountered this problem on 2.2.1 myself, so I checked the trunk source code and it has not moved a lot since.

I investigated this problem and found the bug, and thus the correction:

https://code.google.com/p/web2py/issues/detail?id=1736#c1

You can now correct if for next version :-)

You're welcome.