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The following page has been changed by ErikBakker: http://wiki.apache.org/hadoop/FAQ The comment on the change is: See http://issues.apache.org/jira/browse/HADOOP-3499 ------------------------------------------------------------------------------ Hadoop offers the ''decommission'' feature to retire a set of existing data-nodes. The nodes to be retired should be included into the ''exclude file'', and the exclude file name should be specified as a configuration parameter - [http://hadoop.apache.org/core/docs/current/hadoop-default.html#dfs.hosts.exclude dfs.hosts.exclude]. This file should have been specified during namenode startup. It could be a zero length file. + [http://hadoop.apache.org/core/docs/current/hadoop-default.html#dfs.hosts.exclude dfs.hosts.exclude]. This file should have been specified during namenode startup. It could be a zero length file. You must use the full hostname, ip or ip:port format in this file. Then the shell command {{{ bin/hadoop dfsadmin -refreshNodes
