hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Raghu Angadi <rang...@yahoo-inc.com>
Subject Re: HDFS is corrupt, need to salvage the data.
Date Tue, 10 Mar 2009 18:44:31 GMT
Mayuran Yogarajah wrote:
> lohit wrote:
>> How many Datanodes do you have.
>> From the output it looks like at the point when you ran fsck, you had 
>> only one datanode connected to your NameNode. Did you have others?
>> Also, I see that your default replication is set to 1. Can you check 
>> if  your datanodes are up and running.
>> Lohit
> There is only one data node at the moment.  Does this mean the data is 
> not recoverable?
> The HD on the machine seems fine so I'm a little confused as to what 
> caused the HDFS to
> become corrupted.

The block files usually don't disappear easily. Check on the datanode if 
you find any files starting with "blk". Also check datanode log to see 
what happened there... may be use started on a different directory or 
something like that.


View raw message