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

[Lincoln Stein]

Hi Joseph,

I believe I have fixed this bug. Please try version 1.997 that I just
uploaded to CPAN.

Lincoln

On Thu, Jul 30, 2009 at 10:10 AM, joseph franklin
<joseph.franklin at yale.edu>wrote:

> 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)
>
>


-- 
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>
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