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Building burcell.org

Welcome to bpurcell.org, the personal homepage of Brandon Purcell. I started building bpurcell.org many, many years ago to share information I ran across everyday in my role as a Support Engineer and Consultant for Macromedia/Adobe. As a support engineer and consultant I always had a lot to blog about but as I moved into managment roles at Adobe my technical content dwindled.

I currently work as the Director of Technology for Universal Mind. My primary responsiblity is managing the SpatialKey project and it has been an amazing experience. I have been spending a lot of time working with Amazon Ec2 and will share my experiences through the blog in the future. I truly believe that Cloud Computing is the IT platform of the future and we have built the SpatialKey architecture on top of Ec2.

Viewing Individual Entry / Main
November 6, 2003

While working with another engineer we ran into a strange issue where the sytem clock on a server would jump ahead.  Normally this would not be a problem but the CreateUUID() function is dependent on time in order to not create a duplicate value.  It waits in a while loop for a number of milliseconds and then returns the value.  If the time jumps ahead it will sit in this loop until the we catch up with the clock time.  This could turn pretty ugly if you have alot of code calling createUUID() because the particular method responsible for the UUID is synchronized and  all requests will que up waiting for the method to complete.  The problem turned out to be a JVM bug on windows and the workaround is provided in the following technote

http://www.macromedia.com/support/coldfusion/ts/documents/createuuid_clock_speed.htm

Comments

Having bored of ordinary desktop and standard Windows look? Want to add some uniqueness and glance to your computer? Windows improvements always help to make your PC individual along with adding new advanced features to ordinary programs, like Windows tray clock.

enjoy Skin Clock at http://www.yaodownload.com/software-development/components-libraries/skinclock/


 

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