[Zope] Re: zope unresponsive

[Erik Myllymaki]

I'll chime in with a "me too" ( see me thread within the last week on the same 
list).

I haven't looked into it as deeply as you, but I have tried the 
DeadlockDebugger which itself was inaccessible during the time when zope was 
spinning. Nothing in the logs.

My install is Zope 2.8.5 on RHEL 4 without Zeo.




Florent Guillaume wrote:
> Try DeadlockDebugger.
> 
> Florent
> 
> Andy Altepeter wrote:
>> Hey All,
>>
>> I'm experiencing hanging issues with my Zope-2.8.6+zeo setup/ RHEL 4. 
>> The hanging isn't categorized by 100% cpu usage. Actually, I had the 
>> same issues using 2.8.5, but I've upgraded since then.  Here's the 
>> situation:
>>
>> I have one zeo client connected to a zeo server on the same box.  
>> Apache sits in front, using RewriteRules to request data from zope.
>>
>> After some time (could be 2 minutes or an hour), the zeo client stops 
>> responding.  Apparently this is called a deadlock or a "spinning zope".
>>
>> I've tried using gdb to attach to the zeo client pid, and use the 
>> recipe http://zopelabs.com/cookbook/1073504990 to print a traceback, 
>> but the call always aborted with SIGABORT.
>> I've captured all of the requests sent to zope during an uptime window 
>> (via Z2.log), and using wget to "replay" the requests.  I've also 
>> pulled from apache's rewrite log all requests proxied to zope, 
>> thinking the Z2.log only writes finished requests.  I setup another 
>> zeo client (on the same box, different port) and used wget to replay 
>> these captures as well.  Just running these captures does not cause 
>> zope to hang.  In fact, I have not been able to cause zope to hang by 
>> replaying.  There doesn't seem to be any one url or sequence of urls 
>> that cause zope to hang.
>>
>> I've tried reinstalling the zope instance, but that didn't help.
>>
>> I've tried using requestprofiler.py to inspect the trace.log.  This 
>> shows a high number of "hangs", but not on a url that actually 
>> triggers a spinning zope.
>>
>> Basically, that's where I'm stuck.  Is there anything else I can try?  
>> Am I missing something?
>>
>> Thanks for the help,
>> Andy
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> 
>