Debian Bug report logs - #501313
php5: lack of session.gc_probability breaks roundcube

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Gokdeniz Karadag <gokdenizk@gmail.com>

To: submit@bugs.debian.org

Subject: php5: lack of session.gc_probability breaks roundcube

Date: Mon, 06 Oct 2008 17:10:33 +0300

Package: php5
Severity: normal


RoundCube webmail and probably some other web applications install their
own session handlers via php functions. They store sessions in their own
databases and handle garbage collection on their own.

In default etch installation, php5 ships with session.gc_probability
setting turned off. It clears "file based" sessions wtih the cronjob,
but aforementioned webapps get no chance to run their garbage
collectors. Is it possible to have both gc_probability set, and the
cronjob running in a default install ?

Also, I have experienced that setting gc_probability in
/etc/php5/apache2/php.ini had no effect ( observed with a low, divisor
and over a long time ) but setting it with the following function call
managed to run the custom garbage collection, If this is not intentionally 
disabled in the package compilation, that might be a bug.
ini_set('session.gc_probability', 1);



-- System Information:
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Message #10 received at 501313@bugs.debian.org (full text, mbox, reply):

From: Samat K Jain <samat@samat.org>

To: 501313@bugs.debian.org

Cc: gokdenizk@gmail.com

Subject: Fixed in lenny?

Date: Fri, 10 Oct 2008 14:48:06 -0400

[Message part 1 (text/plain, inline)]

Do you still see this behavior in lenny? In lenny, setting session.gc_probablity to a non-zero enables garbage collection again.

This has been "fixed"; there's now a mention in php.ini to turn this setting on, see bugs:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=388808
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=388808

-- 
Samat Jain <http://samat.org/> | GPG: 0x1A1993D3
Partner, Chief Technology Officer | Rhombic Networks, LLC

It is dangerous to be right when the government is wrong.
-- Voltaire (174)

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Message #15 received at 501313@bugs.debian.org (full text, mbox, reply):

From: Gokdeniz Karadag <gokdenizk@gmail.com>

Cc: 501313@bugs.debian.org

Subject: Re: Fixed in lenny?

Date: Sun, 12 Oct 2008 21:59:53 +0300

Hi I think you meant also this bug
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=321460

I cannot test with lenny as I have no installed lenny system, but if
gc_probability setting in php.ini is honored, then the bug is fixed.

Is it possible to make php in etch aware of the gc_probability setting By using
the same fix?

Samat K Jain demis ki::
> Do you still see this behavior in lenny? In lenny, setting session.gc_probablity to a non-zero enables garbage collection again.
> 
> This has been "fixed"; there's now a mention in php.ini to turn this setting on, see bugs:
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=388808
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=388808
> 

Message #20 received at 501313@bugs.debian.org (full text, mbox, reply):

From: Samat K Jain <samat@samat.org>

To: Gokdeniz Karadag <gokdenizk@gmail.com>

Cc: 501313@bugs.debian.org

Subject: Re: Fixed in lenny?

Date: Wed, 15 Oct 2008 02:38:31 -0400

[Message part 1 (text/plain, inline)]

> I cannot test with lenny as I have no installed lenny system, but if
> gc_probability setting in php.ini is honored, then the bug is fixed.

It is honored on lenny, yes. Though, it remains disabled (gc_probability = 0).

> Is it possible to make php in etch aware of the gc_probability setting By
> using the same fix?

Someone else will have to answer that... But since lenny will become the new stable soon (hopefully), it may be better use of effort to prepare a switch to lenny than debugging this in etch.

-- 
Samat Jain <http://samat.org/> | GPG: 0x1A1993D3
Partner, Chief Technology Officer | Rhombic Networks, LLC

Arbitrary system (n): System about which nothing general can be said, save "nothing general can be said."
-- Anonymous (430)

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Message #25 received at 501313@bugs.debian.org (full text, mbox, reply):

From: "Raphael Geissert" <atomo64@gmail.com>

To: "Samat K Jain" <samat@samat.org>, 501313@bugs.debian.org

Cc: "Gokdeniz Karadag" <gokdenizk@gmail.com>

Subject: Re: [php-maint] Bug#501313: Fixed in lenny?

Date: Wed, 15 Oct 2008 20:07:43 -0500

Hi,

2008/10/15 Samat K Jain <samat@samat.org>:
>> I cannot test with lenny as I have no installed lenny system, but if
>> gc_probability setting in php.ini is honored, then the bug is fixed.
>
> It is honored on lenny, yes. Though, it remains disabled (gc_probability = 0).
>
>> Is it possible to make php in etch aware of the gc_probability setting By
>> using the same fix?
>
> Someone else will have to answer that... But since lenny will become the new stable soon (hopefully), it may be better use of effort to prepare a switch to lenny than debugging this in etch.
>

IIRC gc_probability should work in etch just like it does in lenny. It
was just turned off in the default php.ini, nothing else.

Please confirm soon, or else I'll just close this bug as there is no real bug.

> --
> Samat Jain <http://samat.org/> | GPG: 0x1A1993D3
> Partner, Chief Technology Officer | Rhombic Networks, LLC
>
> Arbitrary system (n): System about which nothing general can be said, save "nothing general can be said."
> -- Anonymous (430)
>
> _______________________________________________
> pkg-php-maint mailing list
> pkg-php-maint@lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/pkg-php-maint
>


Cheers,
-- 
Raphael Geissert - Debian Maintainer
www.debian.org - get.debian.net

Message #30 received at 501313@bugs.debian.org (full text, mbox, reply):

From: Gokdeniz Karadag <gokdenizk@gmail.com>

To: Raphael Geissert <atomo64@gmail.com>

Cc: 501313@bugs.debian.org

Subject: Re: [php-maint] Bug#501313: Fixed in lenny?

Date: Thu, 16 Oct 2008 12:39:49 +0300

Raphael Geissert demis ki::
> Hi,
> 
> 2008/10/15 Samat K Jain <samat@samat.org>:
>>> I cannot test with lenny as I have no installed lenny system, but if
>>> gc_probability setting in php.ini is honored, then the bug is fixed.
>> It is honored on lenny, yes. Though, it remains disabled (gc_probability = 0).
>>
>>> Is it possible to make php in etch aware of the gc_probability setting By
>>> using the same fix?
>> Someone else will have to answer that... But since lenny will become the new stable soon (hopefully), it may be better use of effort to prepare a switch to lenny than debugging this in etch.
>>
> 
> IIRC gc_probability should work in etch just like it does in lenny. It
> was just turned off in the default php.ini, nothing else.
> 
> Please confirm soon, or else I'll just close this bug as there is no real bug.

There is a problem in etch.

In etch, I have changed the gc_probability in php.ini,
I gave a high probability/divisor ratio (about 1/10, also tried 1/1)
and restarted apache. Garbage collection never happened.

As soon as I copied those settings into the webapp's code with iniset,
garbage collection worked.

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=267720
This states that gc_probability was compiled in as 0,
"""
* Comment out session.gc_probability in the default php.ini, as we've
     now compiled in a default of 0, allowing the cronjob to do the
     garbage collection for us instead. (closes: #267720)
"""

Changing it back may allow the setting in php.ini work.

Message #35 received at 501313@bugs.debian.org (full text, mbox, reply):

From: "Raphael Geissert" <atomo64@gmail.com>

To: "Gokdeniz Karadag" <gokdenizk@gmail.com>, 501313@bugs.debian.org

Subject: Re: [php-maint] Bug#501313: Bug#501313: Fixed in lenny?

Date: Thu, 16 Oct 2008 15:38:03 -0500

[Please do not send me a copy of the message, IOW: no To nor B/CC]

2008/10/16 Gokdeniz Karadag <gokdenizk@gmail.com>:
[...]
> There is a problem in etch.
>
> In etch, I have changed the gc_probability in php.ini,
> I gave a high probability/divisor ratio (about 1/10, also tried 1/1)
> and restarted apache. Garbage collection never happened.

And what sessions path are you using? are you sure the process does
actually have enough rights to delete the files? are you sure the max
life time was reached?

>
> As soon as I copied those settings into the webapp's code with iniset,
> garbage collection worked.
>
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=267720
> This states that gc_probability was compiled in as 0,
> """
> * Comment out session.gc_probability in the default php.ini, as we've
>     now compiled in a default of 0, allowing the cronjob to do the
>     garbage collection for us instead. (closes: #267720)
> """
>
> Changing it back may allow the setting in php.ini work.
>

The only change that was done here was to default to 0 in php itself
(i.e. if gc_probability is not defined in php.ini it will default to
0/off).

>
>

Cheers,
-- 
Raphael Geissert - Debian Maintainer
www.debian.org - get.debian.net

Satchel Paige  - "Don't look back. Something might be gaining on you."

Message #40 received at 501313@bugs.debian.org (full text, mbox, reply):

From: Gokdeniz Karadag <gokdenizk@gmail.com>

To: 501313@bugs.debian.org

Subject: Re: [php-maint] Bug#501313: Bug#501313: Fixed in lenny?

Date: Fri, 17 Oct 2008 14:13:38 +0300

Raphael Geissert demis ki::
> [Please do not send me a copy of the message, IOW: no To nor B/CC]
> 
> 2008/10/16 Gokdeniz Karadag <gokdenizk@gmail.com>:
> [...]
>> There is a problem in etch.
>>
>> In etch, I have changed the gc_probability in php.ini,
>> I gave a high probability/divisor ratio (about 1/10, also tried 1/1)
>> and restarted apache. Garbage collection never happened.
> 
> And what sessions path are you using? are you sure the process does
> actually have enough rights to delete the files? are you sure the max
> life time was reached?
> 

The sessions are stored in a database, and there is write access to database.
The webapp(Roundcube) did not have much users, there were 3000+ sessions in the
database. When garbage collection was moved to the webapp code my first login
initiated garbage collection and number fell to 16.

>> As soon as I copied those settings into the webapp's code with iniset,
>> garbage collection worked.
>>
>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=267720
>> This states that gc_probability was compiled in as 0,
>> """
>> * Comment out session.gc_probability in the default php.ini, as we've
>>     now compiled in a default of 0, allowing the cronjob to do the
>>     garbage collection for us instead. (closes: #267720)
>> """
>>
>> Changing it back may allow the setting in php.ini work.
>>
> 
> The only change that was done here was to default to 0 in php itself
> (i.e. if gc_probability is not defined in php.ini it will default to
> 0/off).

I also guess so, but somehow the setting in php.ini does not get honored. (I
restarted apache, made sure no stale process exists.)

This bug was solved in roundcube by adding the ini_set call to the code, but
other people may have problems with other software.

- Gokdeniz

Message #45 received at 501313-done@bugs.debian.org (full text, mbox, reply):

From: Ondřej Surý <ondrej@sury.org>

To: 501313-done@bugs.debian.org

Subject: #501313: php5: lack of session.gc_probability breaks roundcube

Date: Fri, 8 Jan 2010 17:35:14 +0100

Version: 5.2.6.dfsg.1-1+lenny4

gc_probability is set to non-zero in current stable (lenny)

-- 
Ondřej Surý <ondrej@sury.org>
http://blog.rfc1925.org/

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