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The following page has been changed by AaronKimball: http://wiki.apache.org/hadoop/FAQ ------------------------------------------------------------------------------ will see that the lease for the file is already granted to another client, and will reject the open request for the second client. + [[BR]] + [[Anchor(25)]] + '''25. [#25 I have a new node I want to add to a running Hadoop cluster; how do I start services on just one node?]''' + + This also applies to the case where a machine has crashed and rebooted, etc, and you need to get it to rejoin the cluster. You do not need to shutdown and/or restart the entire cluster in this case. + + First, add the new node's DNS name to the conf/slaves file on the master node. + + Then log in to the new slave node and execute: + + {{{ + $ cd path/to/hadoop + $ bin/hadoop-daemon.sh start datanode + $ bin/hadoop-daemon.sh start tasktracker + }}} +
