I am David Hamilton. Programmer.

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Hi my name is David, I speak Korean and program in PHP. I drink lattes and post on humhum. WHAT AN INDIVIDUAL PERSONALITY. 안녕. 대철이라고 해. 난 한국말 말하고 PHP로 프로그램밍 해. 카패 랕태 먹고 HumHum으로 수다 더려. 어메이징!

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February 03 2010

15:19

Help.GitHub - Generating SSH keys (Linux)

Tags: php github git tutorial key help keys ubuntu howto linux dev ssh

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January 06 2010

11:27

php curl s3 tarzan select/poll returning error

ok for the last couple of days i've been blighted by an odd error that is affecting the staging server of one of my sites. i've been using the awesome AWS framework Tarzan to send files to S3 and everything was running fine up to christmas. i left for the christmas break and had a great time etc, but came back and the site no longer worked.

after much searching and debugging i finally tracked the problem down to curl producing this error "select/poll returning error". not tremendously helpful and no response seemed to be coming back either which really puzzled me*. thing is the code worked absolutely fine on my local machine.

anyway fruitless google searches, i decided to download the latest version of tarzan and just test a file upload in isolation on the staging server. what a good idea THAT was. it immediately gave me a skewed time error, which as it turns out, was the problem causing the uploads to fail.

the system time on my staging server had become 15 minutes out of sync with amazon's server time. as soon as i update my server's time to The Actual Time™ my uploads started working again.

Now I don't my server to lose track of time again so I did a little research found out about a neat wee app that keeps time for you called NTP and here's how you install it ...

$ sudo yum install ntp

$ sudo /usr/sbin/ntpdate pool.ntp.org

$ sudo /sbin/service ntpd start

i'm going to go and relax with a coffee now

* when i use words like puzzled or tricky, what i mean is i was screaming, shouting and throwing things across the room in a primeval rage

Tags: php curl s3 tarzan select poll returning error aws