Hi Jack, Does this happen even if you aren't running Yourkit on the DN?
Can you try using a Sun JDK instead of OpenJDK? -Todd On Sun, May 1, 2011 at 7:34 PM, Jack Levin <[email protected]> wrote: > Version: 0.20.2+320 hdfs > .89 HBASE > > ulimit is 32k > xcievers is 5k > > Note from the jstack, I am not exceeding xcievers. > > -Jack > > On Sun, May 1, 2011 at 6:19 PM, Michael Segel <[email protected]> > wrote: > > > > > > What's your xceivers set to? > > What's the ulimit -n set for hdfs/hadoop user... (You didn't say which > release/version you were using.) > > > >> Date: Sun, 1 May 2011 17:47:18 -0700 > >> Subject: one of our datanodes stops working after few hours > >> From: [email protected] > >> To: [email protected] > >> > >> I took a jstack (http://pastebin.com/5v6mHg3t). After few hours, its > >> literally staggers to a halt and gets very very slow... Any ideas > >> whats its blocking on? > >> (main issue is that fsreads for RS get really slow when that happens). > >> > >> -Jack > > > -- Todd Lipcon Software Engineer, Cloudera
