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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "TroubleShooting" by SteveLoughran
Date Sat, 09 Aug 2008 13:42:08 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

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.
+ 

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