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The following page has been changed by SteveLoughran: http://wiki.apache.org/hadoop/TroubleShooting The comment on the change is: dfs client problems ------------------------------------------------------------------------------ == NameNode startup fails == - === Exception when initializing the filesystem == + === Exception when initializing the filesystem === {{{ERROR org.apache.hadoop.dfs.NameNode: java.io.EOFException @@ -34, +34 @@ Take a back up of {{{dfs.name.dir}}} before updating and playing around with it. + == Client cannot talk to filesystem == + + === Error message: Could not get block locations. Aborting... === + + There are at least two couple of causes for this. + + 1. The namenode may be overloaded. Check the logs for messages that say "discarding calls..." + 1. There may not be enough (any) datanodes for the data to be written. Again, check the logs. +
