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<font face="sans-serif">Hi,<br>
<br>
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.<br>
<br>
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.<br>
<br>
I believe the following details will be useful,<br>
<br>
<font color="#660000">[root@domU-12-31-39-07-81-36 StoreGrid]# cat
/etc/redhat-release<br>
CentOS release 5.4 (Final)<br>
</font><br>
<font color="#660000">[root@domU-12-31-39-07-81-36 StoreGrid]# df
-lTi<br>
Filesystem Type Inodes IUsed IFree IUse% Mounted on<br>
/dev/sda1 ext3 1310720 107566 1203154 9% /<br>
/dev/sdb ext3 19546112 11 19546101 1% /mnt<br>
none tmpfs 186059 1 186058 1% /dev/shm<br>
/dev/sdh xfs 1934272 495857 1438415 26% /mymountpoint<br>
</font><br>
<font color="#660000">[root@domU-12-31-39-07-81-36 StoreGrid]#
uname -a<br>
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<br>
</font><br>
Output of dmesg :<br>
<br>
<font color="#660000">SGI XFS with ACLs, security attributes,
large block numbers, no debug enabled<br>
SGI XFS Quota Management subsystem<br>
Filesystem "sdh": Disabling barriers, not supported by the
underlying device<br>
XFS mounting filesystem sdh<br>
Ending clean XFS mount for filesystem: sdh<br>
Filesystem "sdh": XFS internal error xfs_trans_cancel at line
1138 of file fs/xfs/xfs_trans.c. Caller 0xee201944<br>
[<ee2032fe>] xfs_trans_cancel+0x59/0xe3 [xfs]<br>
[<ee201944>] xfs_rename+0x8f8/0x954 [xfs]<br>
[<ee201944>] xfs_rename+0x8f8/0x954 [xfs]<br>
[<ee21458c>] xfs_vn_rename+0x30/0x70 [xfs]<br>
[<c10bb5e3>] selinux_inode_rename+0x11f/0x16d<br>
[<c1078d88>] vfs_rename+0x2c3/0x441<br>
[<c107a77f>] sys_renameat+0x15a/0x1b4<br>
[<c1074b7f>] sys_stat64+0xf/0x23<br>
[<c1072d3b>] __fput+0x140/0x16a<br>
[<c10841ee>] mntput_no_expire+0x11/0x6a<br>
[<c107a800>] sys_rename+0x27/0x2b<br>
[<c1005688>] syscall_call+0x7/0xb<br>
=======================<br>
xfs_force_shutdown(sdh,0x8) called from line 1139 of file
fs/xfs/xfs_trans.c. Return address = 0xee217778<br>
Filesystem "sdh": Corruption of in-memory data detected.
Shutting down filesystem: sdh<br>
Please umount the filesystem, and rectify the problem(s)<br>
I/O error in filesystem ("sdh") meta-data dev sdh block
0x3c0001 ("xfs_trans_read_buf") error 5 buf count 512<br>
I/O error in filesystem ("sdh") meta-data dev sdh block
0x780001 ("xfs_trans_read_buf") error 5 buf count 512<br>
xfs_force_shutdown(sdh,0x1) called from line 423 of file
fs/xfs/xfs_rw.c. Return address = 0xee217778<br>
xfs_force_shutdown(sdh,0x1) called from line 423 of file
fs/xfs/xfs_rw.c. Return address = 0xee217778<br>
Filesystem "sdh": Disabling barriers, not supported by the
underlying device<br>
XFS mounting filesystem sdh<br>
Starting XFS recovery on filesystem: sdh (logdev: internal)<br>
Ending XFS recovery on filesystem: sdh (logdev: internal)</font><br>
<br>
The XFS utilities are in v2.9.4<br>
<br>
Any help would be appreciated.<br>
<br>
Regards,<br>
Srinivasan<br>
</font>
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