Input/Output error

From: Srinivasan T <srinivasan@storegrid.com>
To: xfs@oss.sgi.com
Subject: Input/Output error
Date: Tue, 22 Feb 2011 21:14:24 +0530	[thread overview]
Message-ID: <4D63D9D8.3060204@storegrid.com> (raw)

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Hi,

We are running an C++ application in AWS EC2 instance (CentOS 5.4) 
mounted with an EBS Volume (say /mymountpoint). We do more simultaneous 
writes to the EBS Volume from our application. But at some point we get 
'ERROR: Input/output error'. After this, 'ls -l /mymountpoint' command 
itself fails with the i/o error. The filesystem which we use for the EBS 
Volume is xfs.

I unmounted the drive and done xfs_check and again mounted the drive. 
Now, everything seems to be working fine. But the issue still persists 
everytime when we do simultaneous writes.

I believe the following details will be useful,

[root@domU-12-31-39-07-81-36 StoreGrid]# cat /etc/redhat-release
CentOS release 5.4 (Final)

[root@domU-12-31-39-07-81-36 StoreGrid]# df -lTi
Filesystem    Type    Inodes   IUsed   IFree IUse% Mounted on
/dev/sda1     ext3   1310720  107566 1203154    9% /
/dev/sdb      ext3   19546112      11 19546101    1% /mnt
none         tmpfs    186059       1  186058    1% /dev/shm
/dev/sdh       xfs   1934272  495857 1438415   26% /mymountpoint

[root@domU-12-31-39-07-81-36 StoreGrid]# uname -a
Linux domU-12-31-39-07-81-36 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 
12:39:36 EST 2008 i686 i686 i386 GNU/Linux

Output of dmesg :

SGI XFS with ACLs, security attributes, large block numbers, no debug 
enabled
SGI XFS Quota Management subsystem
Filesystem "sdh": Disabling barriers, not supported by the underlying device
XFS mounting filesystem sdh
Ending clean XFS mount for filesystem: sdh
Filesystem "sdh": XFS internal error xfs_trans_cancel at line 1138 of 
file fs/xfs/xfs_trans.c.  Caller 0xee201944
  [<ee2032fe>] xfs_trans_cancel+0x59/0xe3 [xfs]
  [<ee201944>] xfs_rename+0x8f8/0x954 [xfs]
  [<ee201944>] xfs_rename+0x8f8/0x954 [xfs]
  [<ee21458c>] xfs_vn_rename+0x30/0x70 [xfs]
  [<c10bb5e3>] selinux_inode_rename+0x11f/0x16d
  [<c1078d88>] vfs_rename+0x2c3/0x441
  [<c107a77f>] sys_renameat+0x15a/0x1b4
  [<c1074b7f>] sys_stat64+0xf/0x23
  [<c1072d3b>] __fput+0x140/0x16a
  [<c10841ee>] mntput_no_expire+0x11/0x6a
  [<c107a800>] sys_rename+0x27/0x2b
  [<c1005688>] syscall_call+0x7/0xb
  =======================
xfs_force_shutdown(sdh,0x8) called from line 1139 of file 
fs/xfs/xfs_trans.c.  Return address = 0xee217778
Filesystem "sdh": Corruption of in-memory data detected.  Shutting down 
filesystem: sdh
Please umount the filesystem, and rectify the problem(s)
I/O error in filesystem ("sdh") meta-data dev sdh block 0x3c0001       
("xfs_trans_read_buf") error 5 buf count 512
I/O error in filesystem ("sdh") meta-data dev sdh block 0x780001       
("xfs_trans_read_buf") error 5 buf count 512
xfs_force_shutdown(sdh,0x1) called from line 423 of file 
fs/xfs/xfs_rw.c.  Return address = 0xee217778
xfs_force_shutdown(sdh,0x1) called from line 423 of file 
fs/xfs/xfs_rw.c.  Return address = 0xee217778
Filesystem "sdh": Disabling barriers, not supported by the underlying device
XFS mounting filesystem sdh
Starting XFS recovery on filesystem: sdh (logdev: internal)
Ending XFS recovery on filesystem: sdh (logdev: internal)

The XFS utilities are in v2.9.4

Any help would be appreciated.

Regards,
Srinivasan

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