[Gmod-help] Session locks overwritten with mod_perl and fcgi

[joseph franklin]

Lincoln,
As far as I know, everything I'm doing related to session locking is  
the default, except that I added the "session lock type = nfs" line to  
try to make sure that it isn't using flock:

# session settings
session lock type = nfs
session driver = driver:file;serializer:default
session args   = Directory /var/tmp/gbrowse2/sessions

Since this problem is limited to the mod_perl and fcgi modes, is there  
something specific to those packages that needs to be specified for  
proper session locking? (I know very little about insides of those  
modules or apache2).

Let me know if I can provide any more info.  Thanks-
Joe


On 29 Jul 2009, at 16:10, Lincoln Stein wrote:

> This is unpleasant news; I thought the session locking was pretty  
> well tested. Can you describe how to reproduce this bug?
>
> Lincoln
>
> On Tue, Jul 28, 2009 at 12:26 PM, joseph franklin <joseph.franklin at yale.edu 
> > wrote:
> (Now that I've recovered the browser installation, I'll post my  
> original question)
>
> When I use either ModPerl or Fast-CGI in Gbrowse2 (1.996), track  
> loading and refresh are both nicely accelerated.  However, in either  
> of these modes, it seems like the session locks get overwritten,  
> rather than created, when a new user accesses the browser (the  
> landmarks, tracks, etc. are lost for the first user).  The default  
> installation (localhost/cgi-bin/gb2/) appears to be locking sessions  
> normally.
>
> Realizing that GBrowse 2 is pre-release, I'd love to hear if anyone  
> has any easy suggestions (or perhaps this is a bug).
>
> I'm running this on Ubuntu 9.04 (webserver: Apache/2.2.11 (Ubuntu)  
> PHP/5.2.6-3ubuntu4.1 with Suhosin-Patch mod_perl/2.0.4 Perl/v5.10.0  
> Server).
>
> Here is my GBrowse.conf session settings stanza:
> # session settings
> session driver = driver:file;serializer:default
> session args   = Directory /var/tmp/gbrowse2/sessions
>
>
> /var/tmp/gbrowse2/sessions and /var/tmp/gbrowse2/locks are both  
> writable to the server, and indeed written to when any new session  
> is started (except in the mod_perl or fcgi cases, when relevant  
> session/lock files are overwritten).
>
>
> Thanks,
> joe
>
>
>
> ________________________________
> Joe Franklin
> Department of Cell Biology
> Yale University School of Medicine
> 295 Congress Ave, BCMM 137
> New Haven, CT 06519
> USA
>
> joseph.franklin at yale.edu
> 407 341 3263 (cell)
> 203 654 7494 (google voice)
>
>
>
>
> -- 
> Lincoln D. Stein
> Director, Informatics and Biocomputing Platform
> Ontario Institute for Cancer Research
> 101 College St., Suite 800
> Toronto, ON, Canada M5G0A3
> 416 673-8514
> Assistant: Renata Musa <Renata.Musa at oicr.on.ca>

________________________________
Joe Franklin
Department of Cell Biology
Yale University School of Medicine
295 Congress Ave, BCMM 137
New Haven, CT 06519
USA

joseph.franklin at yale.edu
407 341 3263 (cell)
203 654 7494 (google voice)

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