On Jul 1, 2010, at 7:50 PM, elton sky wrote: > hello, > > I am trying to separate my 6 nodes onto 2 different racks. > For test purpose, I wrote a bash file which smply returns "rack0" all the > time. And I add property "topology.script.file.name" in core-site.xml.
rack0 or /rack0? I think the leading / is required. > > When I restart by start-dfs.sh, the namenode could not find any datanode at > all. All datanodes are lost somehow. If I remove "topology.script.file.name" > from conf, things back to normal, i.e. all datanodes are under > "default-rack". > > I don't why datanode couldn't register to namenode when using rack. Any > ideas? It sounds like your topology script isn't returning the data in the correct format.
