I started setting up hadoop cluster with 2 servers. And somehow couldn’t get past the ‘namenode format’ stage. That was strange considering I wasn’t a newbie. It consistently threw the following exception now matter what I did:
[XXX]$ bin/hadoop namenode -format
INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = hadoop1/127.0.0.1
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 0.20.2
STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
************************************************************/ Re-format filesystem in /data/hadoop/name ? (Y or N) y
Format aborted in /data/hadoop/name
INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hadoop1/127.0.0.1
************************************************************/
And finally I resolved it. It turned of to be a silly case sensitivity issue. So “Y” was suppose to be uppercase…Damn!!
Somehow yesterday my connection started timing out randomly. I’ve Comcast Modem + Linksys Router supporting couple of server on ethernet & couple of laptops on wireless. The problem was pretty strange because not all request were timing out. So the network was working in a distorted fashion. Read the rest of this entry »
Today I came across this post where one of the computer scientist Vinay Deolalikar from HP labs solved one of the long standing unsolved puzzle in Computer Science field. He is claiming “P is Not Equal to NP” & on verge of publishing a paper & will get 1 Million USD.
“Wave has not seen the user adoption we would have liked. We don’t plan to continue developing Wave as a standalone product, but we will maintain the site at least through the end of the year and extend the technology for use in other Google projects.”
1. iD3 The beauty of a jailbroken iPhone is that you can skin it like crazy. iD3 ($1.99) gives a gorgeous high-tech makeover to your Lock Screen, icons, and even various built-in apps (like Calculator, Dialer, and iPod). It also customizes user-interface sounds. It’s just one of more than 100 available themes; pick any of them to give your iPhone a fresh, distinctive look.
2. IntelliScreen The iPhone is long overdue for some kind of functional, Windows Mobile-style “Today” screen. IntelliScreen ($9.99) brings your calendar, e-mail, and text messages to the Lock Screen, plus custom news, sports, and weather. Setting up your layout can be a bit tricky, and the screen can be slow to populate, but it’s still the best use of the Lock Screen I’ve seen to date.
Excerpt From Chetan Bhagat’s inaugural speech at Symbiosis in 2008:
Don’t just have career or academic goals. Set goals to give you a balanced, successful life. I use the word balanced before successful. Balanced means ensuring your health, relationships, mental peace are all in good order. There is no point of getting a promotion on the day of your breakup. There is no fun in driving a car if your back hurts. Shopping is not enjoyable if your mind is full of tensions. Read the rest of this entry »
I recently came across this very interesting website which tells you how do you write. The website has writing analyzer which is build on top of sophisticated statistical analysis tool. Based on your choice of words and writing style it will align you with writing author.
This stuff is worth experimenting. You can try it here
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