It depends where the media error occurs. If it is in the 1MB heartbeat file,
it will fence.
Eckenfels. Bernd wrote:
Did you get read error (media sense or something like that) messages in
the kernel log (dmesg) while using the debug tool. Ocfs2 should really
not kill the cluster in that case.
Bernd
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Holger
Brueckner
Sent: Friday, September 15, 2006 10:21 AM
To: Sunil Mushran
Cc: [email protected]
Subject: Re: [Ocfs2-users] self fencing and system panicproblem
afterforced reboot
i guess i found the solution. while dumping some files with debugfs, it
suddenly stopped working and could not be killed. and guess what, media
error on the drive :-/. funny that a filesystem check succeeds.
anyway thx a lot to those who responded.
holger
On Thu, 2006-09-14 at 11:03 -0700, Sunil Mushran wrote:
Not sure why a power outage should cause this.
Do you have the full stack of the oops? It will show the times taken
in the last 24 operations in the hb thread. That should tell us as to
what is up.
Holger Brueckner wrote:
i just discovered the ls, cd, dump and rdump commands in
debugfs.ocfs2.
they work fine :-). neverless i would really like to know why
mounting and accessing the volume is not possible anymore.
but thanks for the hint pieter
holger brueckner
On Thu, 2006-09-14 at 14:30 +0200, Pieter Viljoen - MWEB wrote:
Hi Holger
Maybe you should try the fscat tools
(http://oss.oracle.com/projects/fscat/) - which has a fsls (to
list) and fscp (to copy) directly from the device.
I have not tried it yet, so good luck!
Pieter Viljoen
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Holger
Brueckner
Sent: Thursday, September 14, 2006 14:17
To: [email protected]
Subject: Re: [Ocfs2-users] self fencing and system panic problem
afterforced reboot
side note: setting HEARBEAT_THRESHOLD to 30 did not help either.
could it be that the syncronization between the daemons does not
work?
(e.g daemons think fs is mounted on some nodes and try to
synchonize but actually the fs isn't mounted on any node?)
i'm rather clueless now. finding a way to access the data and copy
it to the non shared partitions would help me a lot.
thx
holger brueckner
On Thu, 2006-09-14 at 13:47 +0200, Holger Brueckner wrote:
X-CS-3-Report: plain
hello,
i'm running ocfs2 to provide a shared disk thoughout a xen
cluster.
this setup was working fine until today where there was an power
outage
and all xen nodes where forcefully shut down. whenever i try to
mount/access the ocfs2 partition the system panics and reboots:
darks:~# fsck.ocfs2 -y -f /dev/sda4
(617,0):__dlm_print_nodes:377 Nodes in my domain
("5BA3969FC2714FFEAD66033486242B58"):
(617,0):__dlm_print_nodes:381 node 0 Checking OCFS2 filesystem in
/dev/sda4:
label: <NONE>
uuid: 5b a3 96 9f c2 71 4f fe ad 66 03 34 86 24 2b
58
number of blocks: 35983584
bytes per block: 4096
number of clusters: 4497948
bytes per cluster: 32768
max slots: 4
/dev/sda4 was run with -f, check forced.
Pass 0a: Checking cluster allocation chains Pass 0b: Checking
inode allocation chains Pass 0c: Checking extent block allocation
chains Pass 1: Checking inodes and blocks.
[CLUSTER_ALLOC_BIT] Cluster 295771 is marked in the global cluster
bitmap but it isn't in use. Clear its bit in the bitmap? y
[CLUSTER_ALLOC_BIT] Cluster 2456870 is marked in the global
cluster bitmap but it isn't in use. Clear its bit in the bitmap?
y [CLUSTER_ALLOC_BIT] Cluster 2683096 is marked in the global
cluster bitmap but it isn't in use. Clear its bit in the bitmap?
y Pass 2: Checking directory entries.
Pass 3: Checking directory connectivity.
Pass 4a: checking for orphaned inodes Pass 4b: Checking inodes
link counts.
All passes succeeded.
darks:~# mount /data
(622,0):ocfs2_initialize_super:1326 max_slots for this device: 4
(622,0):ocfs2_fill_local_node_info:1019 I am node 0
(622,0):__dlm_print_nodes:377 Nodes in my domain
("5BA3969FC2714FFEAD66033486242B58"):
(622,0):__dlm_print_nodes:381 node 0
(622,0):ocfs2_find_slot:261 slot 2 is already allocated to this
node!
(622,0):ocfs2_find_slot:267 taking node slot 2
(622,0):ocfs2_check_volume:1586 File system was not unmounted
cleanly, recovering volume.
kjournald starting. Commit interval 5 seconds
ocfs2: Mounting device (8,4) on (node 0, slot 2) with ordered data
mode.
(630,0):ocfs2_replay_journal:1181 Recovering node 2 from slot 0 on
device (8,4) darks:~# (4,0):o2hb_write_timeout:164 ERROR:
Heartbeat write timeout
to
device sda4 after 12000 milliseconds
(4,0):o2hb_stop_all_regions:1789 ERROR: stopping heartbeat on all
active
regions.
Kernel panic - not syncing: ocfs2 is very sorry to be fencing this
system by panicing
ocfs2-tools 1.2.1-1
kernel 2.6.16-xen (with corresponding ocfs2 compiled into
the
kernel)
i already tried the elevator=deadline scheduler option with no
effect.
any further help debugging this issue is greatly appreciated. are
ther any other possibilities to get access to the data from
outside the cluster (obviously while the partition isn't mounted)
?
thanks for your help
holger brueckner
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