[Zope] Zope hangs

[Peter Bengtsson]

Yes, and you can use the Control_Panel/DebugInfo as well and scroll
down to the Connections table. Out of the 8 threads most of them
should be vacant (ie. None) and if there are some requests logged
there they should in the range of < 1 sec.
If any of them are longer than 1 sec they are either stuck or doing
something is supposed to take a long time (e.g. render a complex
report, do a big upload, etc.)

I once had a similar problem and I hacked the LDAPUserFolder to do a
timing of the connections and found that connecting to the LDAP server
was super slow and thus each connection cost too much time and it
subsequently blocked the threads.

Peter



2008/9/30 Nico Grubert <nicogrubert at gmail.com>:
> Hi there
>
> in the last days my Zope server seems to hang and the CPU is almost
> every time at 100 %.
>
> I installed DeadlockDebugger and see a lot of these entries:
> -----------------------------------------------------------------------------
>   File "/usr/local/Zope-2.10.5/lib/python/OFS/Traversable.py", line
> 288, in unrestrictedTraverse
>     return obj
>   File "/usr/local/Zope-2.10.5/lib/python/ZODB/Connection.py", line
> 767, in setstate
>     raise
>   File "/usr/local/Zope-2.10.5/lib/python/ZODB/Connection.py", line
> 820, in _setstate
>     obj._p_serial = serial
>   File "/usr/local/Zope-2.10.5/lib/python/ZODB/serialize.py", line 605,
> in setGhostState
>     obj.__setstate__(state)
>   File "/usr/local/Zope-2.10.5/lib/python/ZODB/serialize.py", line 597,
> in getState
>     return unpickler.load()
>   File "/usr/local/Zope-2.10.5/lib/python/ZODB/serialize.py", line 471,
> in _persistent_load
>     return self.load_oid(reference)
>   File "/usr/local/Zope-2.10.5/lib/python/ZODB/serialize.py", line 537,
> in load_oid
>     return self._conn.get(oid)
>   File "/usr/local/Zope-2.10.5/lib/python/ZODB/Connection.py", line
> 225, in get
>     return obj
>   File
> "/usr/local/Zope-2.10.5/lib/python/ZODB/FileStorage/FileStorage.py",
> line 562, in load
>     self._lock_release()
>   File "/usr/local/lib/python2.4/threading.py", line 109, in acquire
>     return rc
> -----------------------------------------------------------------------------
>
> I am wondering what the last line
>   File "/usr/local/lib/python2.4/threading.py", line 109, in acquire
>     return rc
> does exactly mean. Are the threads blocked?
>
>
> My configuration:
> -Zope 2.10.5 running with 8 threads on a 2-CPU machine with 8 GB of RAM
> -Python 2.4.4
> -LDAPUserfolder
> -Silva CMS 2.0.8
> -ZODB size: ~6 Gbyte
> -Only 6-10 people work in the CMS and no public access  (spy bots,
>  crawlers) access the Zope server
>
>
> Regards
> Nico
> _______________________________________________
> Zope maillist  -  Zope at 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 )
>



-- 
Peter Bengtsson,
work www.fry-it.com
home www.peterbe.com
hobby www.issuetrackerproduct.com