Re:Re: I am running MapReduce on a 30G data on 1master/2 slave, but failed.

2013-01-15 Thread Charlie A.
Hi, yaotian I think you should check logs on the very tasktracker, it'll tell you why. And here's some tips on deploying a MR job. http://blog.cloudera.com/blog/2009/12/7-tips-for-improving-mapreduce-performance/ Charlie At 2013-01-15 16:34:27,yaotian yaot...@gmail.com wrote: I set

回复: HBase, org.apache.hadoop.hbase.PleaseHoldException: Master is initializing

2012-11-11 Thread Charlie AI
hi, 吴靖 I have got this error before. Please stop hbase on your cluster first. And restart them with certain sequences: first regionserver on all nodes, then hmaster. Wish it helps. Regards, Charlie 发件人: 吴靖 qhwj2...@126.com 收件人: user@hadoop.apache.org 发送日期

starting secondary namenode, edits and edits.new already exist

2011-01-21 Thread charlie w
it will happen. Of course, the real question is how to get a secondary name node going with as little risk as possible. Should we just start up the secondary name node? Or should we restart the name node first? Or is there some other way for us to get right with our cluster? Thanks, Charlie