my life

Starling Protocol Bug in STATS Response

Sat, 19 Jul 2008 01:13:25 +0000

The memcache protocol requires that all lines in the server response end with CRLN (\r\n). The Starling server doesn’t strictly obey this for the STATS command. The fix is trivial and the author has been notified of the fix.

Edit lib/starling/handler.rb and add the following gsub right before .freeze in the STATS_RESPONSE:

%sEND\r\n”.gsub(/\r?\n/, “\r\n”).freeze

And the same for QUEUE_STATS_RESPONSE:

STAT queue_%s_expired_items %d\n”.gsub(/\r?\n/, “\r\n”).freeze

What to do if spl_autoload_call() hasn’t defined the class

Sun, 06 Jul 2008 06:26:18 +0000

Recently, I was getting the error

Warning: session_start() [function.session-start]: Function spl_autoload_call() hasn’t defined the class it was called for in…

In my particular case, the problem stemmed from defining a deserialization function using

ini_set(’unserialize_callback_func’, ’spl_autoload_call’)

(well, symfony defines it)

In the process of deserializing an object, it tried to instantiate a class which hadn’t yet been loaded. The autoloader wasn’t able to find the class and the spl autoload functionality therefore croaked.

The problem was that I had defined a property inside of one my model objects that referenced the sfWebRequest. This property should never have been serialized. Infact, only the properties of the object as defined in model should get serialized. The fix was defined a __sleep method in the model.

public function __sleep() { return MySampleObjectPeer::getFieldNames(BasePeer::TYPE_FIELDNAME); }

Replace MySampleObjectPeer with the appropriate peer class.

Installing CPAN Packages for Debian

Thu, 19 Jun 2008 19:32:54 +0000

If you want to install CPAN modules as Debian packages, this HOWTO is for you.

First, install dh-make-perl:

apt-get install dh-make-perl

Then build & install the package. For example, if you wish to install the module Nagios::Plugins::Memcached from CPAN, simply run:

dh-make-perl --install --cpan Nagios::Plugins::Memcached

You’re done.

Nginx Rewrite to 404

Thu, 15 May 2008 03:13:59 +0000

The following Nginx configuration technique will allow you to do rewrites to status codes.

rewrite ^.*?\.(?:swf|xml|gif|jpg|png|css|js)$ @404 break; location = @404 { return 404; }

Must have Yum Plugin: fastestmirror

Wed, 30 Apr 2008 23:48:39 +0000

Yum always gets stuck on dead mirrors or slow mirrors. Avoid this by installing yum-fastestmirror
yum install yum-fastestmirror
yum clean all

RPM Package List Without Version Info

Wed, 30 Apr 2008 22:48:05 +0000

rpm -qa --qf “%{NAME}\n” > /tmp/installed-packages.log

To install those packages, run:

yum install -y $(cat /tmp/installed-packages.log)

Capistrano Put File Fix

Fri, 25 Apr 2008 19:49:29 +0000

Up until recently, it was not possible to upload large files asynchronously to 2 or more machines simultaneously. This was due to a problem in the ruby ssh implementation. A patch is available which fixes this.

http://rubyforge.org/tracker/index.php?func=detail&aid=17857&group_id=274&atid=1123

If applying the patch is not an option, you can always change the transfer mode to synchronous.

set :synchronous_connect, true

Count Down to LA

Thu, 27 Mar 2008 06:55:36 +0000

Welcome back Sofie!!!

Configuring Mutt for IMAP support

Mon, 31 Dec 2007 16:32:10 +0000

Configuring Mutt with IMAP is as easy as editing your .muttrc and adding the following lines.

set spoolfile=imap://username:password@host/INBOX set folder=imap://username:password@host/INBOX

You can then change folders inside of Mutt by pressing ‘c’ and then ‘?’ to get a folder list.

Unknown table engine ‘InnoDB’

Sun, 23 Dec 2007 15:05:31 +0000

I was getting the error “ERROR 1286 (42000): Unknown table engine ‘InnoDB’” when trying to create/alter tables with the InnoDB engine. You can check for this warning by issuing the create or alter statements and then running

show warnings;

in the same mysql client session.

Check if you have InnoDB support enabled:

The problem is that InnoDB is not enabled by default in Debian distributions of my.cnf. To enable it, simply comment the following lines under the [mysqld] section.

#skip-innodb