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From Hiran Chaudhuri <hiran.chaudh...@amadeus.com>
Subject Re: Fwd: umount bad disk
Date Thu, 13 Feb 2014 18:06:37 GMT
You may want to check this out:

http://stackoverflow.com/questions/323146/how-to-close-a-file-descriptor-from-another-process-in-unix-systems

Hiran Chaudhuri
System Support Programmer / Analyst
Business Development (DB)
Hosting & Regional Services (BH)
Amadeus Data Processing GmbH
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T: +49-8122-43x3662
hiran.chaudhuri@amadeus.com
amadeus.com





From:   Arpit Agarwal <aagarwal@hortonworks.com>
To:     user@hbase.apache.org, 
Date:   13/02/2014 18:10
Subject:        Fwd: umount bad disk



bcc'ed hadoop-user

Lei, perhaps hbase-user can help.

---------- Forwarded message ----------
From: lei liu <liulei412@gmail.com>
Date: Thu, Feb 13, 2014 at 1:04 AM
Subject: umount bad disk
To: user@hadoop.apache.org


I use HBase0.96 and CDH4.3.1.

I use Short-Circuit Local Read:
<property>
  <name>dfs.client.read.shortcircuit</name>
  <value>true</value>
</property>
<property>
  <name>dfs.domain.socket.path</name>
  <value>/home/hadoop/cdh4-dn-socket/dn_socket</value>
</property>

When one disk is bad, because the RegionServer open some file on the disk, 

so I don't run "umount", example:
sudo umount -f /disk10
umount2: Device or resource busy


umount: /disk10: device is busy
umount2: Device or resource busy
umount: /disk10: device is busy 

I must stop RegionServer in order to run umount command. 


How can don't stop RegionServer and delete the bad disk.

Thanks,

LiuLei











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