Hi all, Probably is a stupid question but I don't figure out what happens. For example I start on master, start-dfs.sh, start-mapred.sh However, when I want to stop: stop-mapred, stop-dfs, only one slave instance is killed. For example in on the master I am doing something like that: rgrandl@ikq01:~/hadoop/hadoop-0.21.0$ bin/stop-mapred.sh stopping jobtracker ikq02.rrr: no tasktracker to stop ikq03.rrr: stopping tasktracker But I have a tasktracker on ikq02 as well which is not stopped anyway. rgrandl@ikq02:~$ jps 2462 Jps 2211 TaskTracker 2109 DataNode Same thing for stop-dfs.sh Always the tasktracker, datanode instances are killed only on one slave node, even if I have maybe 20 slaves or more. Thanks for any clue, Robert