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Subject: Fwd: umount bad disk
From: Arpit Agarwal <aagarwal@hortonworks.com>
To: user@hbase.apache.org
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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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