FAQ
Hey Zhang,

Thanks for the info. Can you be more specific, eg by NN crash do you
mean NPE? Relevant logs would be helpful.

Thanks,
Eli
On Fri, Dec 4, 2009 at 2:59 PM, Zhang, Zhang wrote:

Eli,

Thanks for responding to my question. I guess what you're mentioning are
dfs.name.edits.dir and dfs.namenode.name.dir. They do not contain any
NFS mounted directories. They were all accessible (can be seen by UNIX
shell commands such as ls and du) when the namenode went down. The error
message is just the symptom. It is not the cause of the failure.

Zhang


-----Original Message-----
From: Eli Collins
Sent: Friday, December 04, 2009 2:03 PM
To: common-user@hadoop.apache.org
Subject: Re: Namenode crashes while rolling edit log from secondary
namenode

Hey Zhang,
org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Fatal Error : All
storage directories are inaccessible.
Are the directories specified by dfs.namenode.[name|edits].dir
accessible? Perhaps they're NFS mounts that are flaking out?

Thanks,
Eli

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