Re: Error: Too Many Fetch Failures

2012-06-28 Thread Ellis H. Wilson III
On 06/19/12 23:10, Ellis H. Wilson III wrote: On 06/19/12 20:42, Raj Vishwanathan wrote: You are probably having a very low somaxconn parameter ( default centos has it at 128 , if I remember correctly). You can check the value under /proc/sys/net/core/somaxconn Aha! Excellent, it does seem

Error: Too Many Fetch Failures

2012-06-19 Thread Ellis H. Wilson III
Hi all, This is my first email to the list, so feel free to be candid in your complaints if I'm doing something canonically uncouth in my requests for assistance. I'm using Hadoop 0.23 on 50 machines, each connected with gigabit ethernet and each having solely a single hard disk. I am

Re: Error: Too Many Fetch Failures

2012-06-19 Thread Ellis H. Wilson III
On 06/19/12 14:11, Minh Duc Nguyen wrote: Take at look at slide 25: http://www.slideshare.net/cloudera/hadoop-troubleshooting-101-kate-ting-cloudera It describes a similar error so hopefully this will help you. I appreciate your prompt response Minh, but as you will notice in the end of my

Re: Error: Too Many Fetch Failures

2012-06-19 Thread Ellis H. Wilson III
On 06/19/12 13:38, Vinod Kumar Vavilapalli wrote: Replies/more questions inline. I'm using Hadoop 0.23 on 50 machines, each connected with gigabit ethernet and each having solely a single hard disk. I am getting the following error repeatably for the TeraSort benchmark. TeraGen runs