[Gluster-devel] difficult bug in 2.5 mainline

[Harris Landgarten]

The backup hung as first described. No data was written from the secondary volume on gluster to the backup tmp dir.

Harris

----- Original Message -----
From: "Harris Landgarten" <harrisl at lhjonline.com>
To: "Amar S. Tumballi" <amar at zresearch.com>
Cc: "gluster-devel" <gluster-devel at nongnu.org>
Sent: Sunday, July 1, 2007 9:46:18 PM (GMT-0500) America/New_York
Subject: Re: [Gluster-devel] difficult bug in 2.5 mainline

Amar,

The rm -rf bug is still there. See the last comment by Daniel to the ml in reply to the problem with rm -rf post to the ml. BTW files are being deleted but at the rate of about 1 every 3 sec with lots of lookups in the logs. I am going to check the other problem now.

Harris
 
----- Original Message -----
From: "Amar S. Tumballi" <amar at zresearch.com>
To: "Harris Landgarten" <harrisl at lhjonline.com>
Cc: "gluster-devel" <gluster-devel at nongnu.org>
Sent: Sunday, July 1, 2007 7:55:09 PM (GMT-0500) America/New_York
Subject: Re: [Gluster-devel] difficult bug in 2.5 mainline

Hi Harris, 
With the latest patch this bug is fixed. Also, i hope it should fix the problem of 'rm -rf' too.. please confirm. 

i am looking into other strange bug reported by you. 

-bulde 


On 7/2/07 , Harris Landgarten < harrisl at lhjonline.com > wrote: 

Disabling posix-locks changes the problem 

The client crashes along with the lock-server brick 

Here is the bt from the client: 

#0 unify_bg_cbk (frame=0xe080168, cookie=0xe1109c8, this=0x8057730, op_ret=0, op_errno=13) at unify.c:83 
83 callcnt = --local->call_count; 
(gdb) bt 
#0 unify_bg_cbk (frame=0xe080168, cookie=0xe1109c8, this=0x8057730, op_ret=0, op_errno=13) at unify.c:83 
#1 0xb75b96e5 in client_unlink_cbk (frame=0xe1109c8, args=0x8059248) at client-protocol.c:2969 
#2 0xb75beff5 in notify (this=0x8057730, event=2, data=0x8095338) at client-protocol.c:4184 
#3 0xb7f73827 in transport_notify (this=0x0, event= 235405672 ) at transport.c:152 
#4 0xb7f74299 in sys_epoll_iteration (ctx=0xbfb96248) at epoll.c:54 
#5 0xb7f738fd in poll_iteration (ctx=0xbfb96248) at transport.c:260 
#6 0x0804a170 in main (argc=6, argv=0xbfb96324) at glusterfs.c:341 
(gdb) print local 
$1 = (unify_local_t *) 0x0 

Harris 

----- Original Message ----- 
From: "Harris Landgarten" < harrisl at lhjonline.com > 
To: "gluster-devel" < gluster-devel at nongnu.org > 
Sent: Sunday, July 1, 2007 10:56:05 AM (GMT-0500) America/New_York 
Subject: [Gluster-devel] difficult bug in 2.5 mainline 

I am trying to track down a bug that is causing hangs in 2.5-patch-249 and all previous. 

This happens during a full Zimbra backup of certain accounts to /mnt/glusterfs/backups 

The first stage of the backup copies indexes and primary storage to /mnt/glusterfs/backups/tmp 
All of this data resides in local storage and the writing to gluster is successful. 

The next stage copies secondary storage to /mnt/glusterfs/backups/tmp 
This fails in the following way: 

Brick1 hangs with no errors 
Brick2 hangs with no errors 
Zimbra client hangs with no errors 
second client loses connectivity 

The second client bails after 2 min but cannot connect 
The Zimbra client never bails 

I then restart the bricks 

After both bricks are restarted, the second client reconnects and a hung df -h completes 

Zimbra client stays in a hung unconnected start 

ls -l /mnt/glusterfs hangs 

Only way is reset is 

kill -9 pidof glusterfs 
umount /mnt/glusterfs 

glusterfs 

Post mortem examination of /mnt/glusterfs/backups/tmp shows that a few files have the written from the secondary storage volume. I this can over 15,000 files should have been written. 

Note: this only happen with large email boxed with some large >10M files. 

Note: with patch-247 the zimbra client would seqfault. With 249 it just hangs in unrecoverable state. 


Harris 


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-- 
Amar Tumballi 
http://amar.80x25.org 
[bulde on #gluster/irc.gnu.org] 


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