[Zope] Zope hangs hangs hangs...

Dennis Allison allison at sumeru.stanford.EDU
Wed Oct 22 15:47:25 EDT 2003


Check the archives.  The fix appers to be to upgrade both kernel and glibc
to the latest release level.  And, if that does not work, load the system
with the new threading stuff disabled (I forget the magic
incantation--it's in the archives).  That being done, I have been able to
make RH9 work in a production environment.  There are still problems, one
of which is that I cannot build Python 2.1.3 from sources, but the
threading problems with Zope seem to have disappeared.   That being said, 
the RH9 production system is significantly less stable than the RH7.3
production system.

On Wed, 22 Oct 2003, Jim Kutter wrote:

> I had the same problems in RH9. After setting my threads to 1, and the
> interval check timer to 22 (pystones/250), the problem seemed to go
> away.
> 
> It's a dedicated development box, so it's not heavily taxed - you may
> not be able to get away with the same settings I did...
> 
> -jim
> 
> -----Original Message-----
> From: zope-bounces+jim=ebizq.net at zope.org
> [mailto:zope-bounces+jim=ebizq.net at zope.org] On Behalf Of Jakub
> Wisniowski
> Sent: Wednesday, October 22, 2003 6:44 AM
> To: zope at zope.org
> Subject: [Zope] Zope hangs hangs hangs...
> 
> 
> Hi
> 
>    I'm experiencing some problems with my Zope. It is Zope 2.6.0
>   sitting on RedHat and connected to Oracle DB via DCOracle. The problem
> is that sometimes Zope hangs.
> 
>     There are tens of users in my app, and there are also some long
>   lasting db queries, so I have total number of zope threads set to 15
>   and zodb cache poool size set to 25. But there is
>   no rule (I can't find any rule) for hanging like heavy load or sth
>   - it just happens.
> 
>    This is pretty mysterious for me, because there is nothing in event
> log except a series of conflict
>   errors, then:
> 
> 2003-10-21T12:39:18 INFO(0) ZODB conflict error at addr (481 conflicts
> since startup at 2003-10-21T02:00:05)
> ------
> 2003-10-21T12:39:24 INFO(0) ZODB conflict error at addr2 (482 conflicts
> since startup at 2003-10-21T02:00:05)
> ------
> 2003-10-21T12:39:26 INFO(0) ZODB conflict error at addr3 (483 conflicts
> since startup at 2003-10-21T02:00:05)
> ------                                                <-- Zope hanging
> here
> 2003-10-21T12:56:34 INFO(0) Z2 Caught signal SIGTERM  <-- restart here
> ------
> 2003-10-21T12:56:34 INFO(0) Z2 Closing all open ZODB databases
> ------
> 2003-10-21T12:56:34 INFO(0) Z2 Shutting down
> 
>   and then system start informations.
> 
>   In z2.log there is also a pause in requests - it looks like:
> 
>   127.0.0.1  - Anonymous [21/Oct/2003:12:40:35 +0200] "GET /addr
> HTTP/1.1" 302 339 "" "Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)"
>   127.0.0.1  - Anonymous [21/Oct/2003:12:56:40 +0200] "GET /addr
> HTTP/1.1" 302 339 "" "Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)"
> 
>    And most descriptive detailed log:
> 
>               Start  WIn WOut WEnd Tot S   OSize Code  Act URL
> 2003-10-21T12:39:42    0    1    0   1 E   21690  200    0  urls
> 2003-10-21T12:39:42    0    0    0   0 E     282  302    0  ...
> 2003-10-21T12:39:45    0    0    0   0 E   14318  200    0  ...
> 2003-10-21T12:39:46    0    2    0   2 E   58170  200    2  ...
> 2003-10-21T12:39:46    0    5    0   5 E   21743  200    4
> 2003-10-21T12:39:48    0   NA   NA   0 I      NA   NA  152  urls
> 2003-10-21T12:39:50    0    1    0   1 E   13904  200    1  ...
> 2003-10-21T12:39:50    0   13    0  13 E  101528  200    9  ...
> 2003-10-21T12:39:50    0   13    0  13 E  101528  200   11  ...
> 2003-10-21T12:39:51    0    1    0   1 E    1790  200    1  ...
> 2003-10-21T12:39:52    0    0    0   0 E   26499  200    0  ...
> 2003-10-21T12:39:53    0    0    0   0 E    7728  302    0
> 2003-10-21T12:39:53    0    1    0   1 E   14049  302    0
> 2003-10-21T12:39:53    0    4    0   4 E   84388  200    2
> 2003-10-21T12:39:54    0    1    0   1 E   18137  200    0
> 2003-10-21T12:39:57    0    1    0   1 E   11716  200    1  urls
> 2003-10-21T12:39:58    0    1    0   1 E   18322  302    0  ...
> 2003-10-21T12:39:59    0    3    0   3 E   15407  200    0  ...
> 2003-10-21T12:40:03    0    1    0   1 E   26706  200    1
> 2003-10-21T12:40:04    0   NA   NA   0 I      NA   NA  138  urls
> 2003-10-21T12:40:05    0   NA   NA   0 I      NA   NA  137  ...
> 2003-10-21T12:40:05    0    1    0   1 E    8084  200    2  ...
> 2003-10-21T12:40:05    0    2    0   2 E   14568  302    2  ...
> 2003-10-21T12:40:06    0   NA   NA   0 I      NA   NA  134  ...
> 2003-10-21T12:40:07    0   NA   NA   0 I      NA   NA  133  ...
> 2003-10-21T12:40:08    0   NA   NA   0 I      NA   NA  132  ...
> 2003-10-21T12:40:12    0   NA   NA   0 I      NA   NA  131  ...
> 2003-10-21T12:40:14    0   NA   NA   0 I      NA   NA  130 
> 2003-10-21T12:40:18    0   NA   NA   0 I      NA   NA  129 
> 2003-10-21T12:40:32    0   NA   NA   0 I      NA   NA  126 
> 2003-10-21T12:40:32    0   NA   NA   0 I      NA   NA  127 
> 2003-10-21T12:40:32    0   NA   NA   0 I      NA   NA  128 
> 2003-10-21T12:40:34    0    1    0   1 E     339  302    0 
> 2003-10-21T12:40:37    0   NA   NA   0 I      NA   NA  124 
> 2003-10-21T12:40:39    0   NA   NA   0 I      NA   NA  123 
> 2003-10-21T12:40:41    0   NA   NA   0 I      NA   NA  122 
> 2003-10-21T12:40:43    0   NA   NA   0 I      NA   NA  121 
> 2003-10-21T12:40:45    0   NA   NA   0 I      NA   NA  119 
> 2003-10-21T12:40:45    0   NA   NA   0 I      NA   NA  120
>                       ...
>                       ...
>                       ...
> 2003-10-21T12:55:25    0   NA   NA   0 I      NA   NA    4 urls
> 2003-10-21T12:55:49    0   NA   NA   0 I      NA   NA    3 ...
> 2003-10-21T12:55:52    0   NA   NA   0 I      NA   NA    2 ...
> 2003-10-21T12:56:03    0   NA   NA   0 I      NA   NA    1 ...
> 2003-10-21T12:56:09    0   NA   NA   0 I      NA   NA    0 ...
> 2003-10-21T12:56:37   NA   NA   NA   0 U      NA   NA    0 System
> startup
> 2003-10-21T12:56:40    0    0    0   0 E     339  302    0 urls
> 2003-10-21T12:56:41    0    0    0   0 E     873  302    1 ...
> 2003-10-21T12:56:41    0    0    0   0 E     339  302    0 ...
> 2003-10-21T12:56:41    0    0    0   0 E     873  302    0 ...
> 2003-10-21T12:56:41    0    0    0   0 E    1672  500    0 ...
> 
>  What can I read from these? Is any of these logs descriptive enough to
> say what is wrong with my Zope? How to do more investigation?
>  I've got some more Zope instances that works perfectly stable in
> similar configuration but not with Oracle database, maybe this is a
> source of these hangs?
> 
> Thanks
> 
> -- 
> Jakub Wisniowski
> 
> 
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