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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "FAQ" by SomeOtherAccount
Date Thu, 14 Oct 2010 20:55:11 GMT
Dear Wiki user,

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

The "FAQ" page has been changed by SomeOtherAccount.


  The NameNode does not have any available DataNodes.  This can be caused by a wide variety
of reasons.  Check the DataNode logs, the NameNode logs, network connectivity, ...
+ == If the NameNode loses its only copy of the fsimage file, can the file system be recovered
from the DataNodes? ==
+ No.  This is why it is very important to configure dfs.name.dir to write to two filesystems
on different physical hosts, use the secondary NameNode, etc.
  = Platform Specific =
  == Windows ==

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