[Zope-dev] zc.async versus Zope 2 SIGTERM

[Vincent Fretin]

Hi,

Did you look how http://pypi.python.org/pypi/plone.app.async have done the
integration with Zope2?

Vincent Fretin
Ecreall
Site : http://vincentfretin.ecreall.com


On Thu, Mar 1, 2012 at 12:19 PM, Christian Theune <ct at gocept.com> wrote:

> Hi,
>
> zc.async's shutdown mechanism doesn't really work with Zope 2's SIGTERM
> handling: in my case it causes the Async's threaded dispatcher to die in
> the middle of something:
>
> Exception in thread Thread-1 (most likely raised during interpreter
> shutdown):
> Traceback (most recent call last):
>  File "/home/ctheune/local/lib/**python2.6/threading.py", line 532, in
> __bootstrap_inner
>  File "/home/ctheune/local/lib/**python2.6/threading.py", line 484, in run
>  File "/home/ctheune/gocept/code/...**deployment/eggs/zc.async-1.5.**
> 4-py2.6.egg/zc/async/**subscribers.py", line 115, in start
>  File "/home/ctheune/gocept/code/...**deployment/eggs/Twisted-10.2.**
> 0-py2.6-linux-x86_64.egg/**twisted/internet/base.py", line 1158, in run
>  File "/home/ctheune/gocept/code/...**deployment/eggs/Twisted-10.2.**
> 0-py2.6-linux-x86_64.egg/**twisted/internet/base.py", line 1172, in
> mainLoop
> <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute
> 'msg'
>
> This ends up in the worker not correctly unregistered and thus on next
> startup:
>
> Exception in thread Thread-1 (most likely raised during interpreter
> shutdown):
> Traceback (most recent call last):
>  File "/home/ctheune/local/lib/**python2.6/threading.py", line 532, in
> __bootstrap_inner
>  File "/home/ctheune/local/lib/**python2.6/threading.py", line 484, in run
>  File "/home/ctheune/gocept/code/**webwork.deployment/eggs/zc.**
> async-1.5.4-py2.6.egg/zc/**async/subscribers.py", line 115, in start
>  File "/home/ctheune/gocept/code/**webwork.deployment/eggs/**
> Twisted-10.2.0-py2.6-linux-**x86_64.egg/twisted/internet/**base.py", line
> 1158, in run
>  File "/home/ctheune/gocept/code/**webwork.deployment/eggs/**
> Twisted-10.2.0-py2.6-linux-**x86_64.egg/twisted/internet/**base.py", line
> 1172, in mainLoop
> <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute
> 'msg'
>
> The funny thing is: although this instance didn't get to register it will
> then on regular shutdown:
>
> 2012-03-01 11:54:56 INFO zc.async.events deactivated dispatcher
> 8da98af0-5c95-11e1-a205-**0024e8d50597
> 2012-03-01 11:54:56 INFO SignalHandler Caught signal SIGINT
> 2012-03-01 11:54:56 INFO Z2 Shutting down
>
> The first issue (fast shutdown) you can avoid by simply not sending
> SIGTERM and switching to always use SIGINT. (For some reason zdaemon seems
> to do that by default when sending SIGTERM to the daemon manager.)
>
> The second issue seems like a bad thing. Right?
>
> Any comments?
> Christian
>
>
>
> --
> Christian Theune · ct at gocept.com
> gocept gmbh & co. kg · forsterstraße 29 · 06112 halle (saale) · germany
> http://gocept.com · tel +49 345 1229889 0 · fax +49 345 1229889 1
> Zope and Plone consulting, development, hosting, operations
>
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