[Ocfs2-users] Random node reboots
Sunil Mushran
sunil.mushran at oracle.com
Tue Dec 7 15:59:13 PST 2010
It means that the network heartbeat has not heard from that node for 60 secs.
If disk heartbeat also agrees, then that node is assumed to be dead and
recovery follows.
nointr has no role to play in all this.
On 12/07/2010 03:56 PM, Neil Campbell wrote:
>
> Thanks Sunil.
>
> OK, so when another node says "......been idle for 60.0 seconds, shutting it down"
>
> It doesn't actually mean it is going to shut down the other node, instead it means
>
> something like it is not including it in the list of available nodes ?
>
> Do you think I should add the nointr mount option for this as a general purpose filesystem?
>
> In the meantime, I will look at setting up netconsole.
>
> Thanks
>
> Neil
>
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> *From:*Sunil Mushran [mailto:sunil.mushran at oracle.com]
> *Sent:* Wednesday, 8 December 2010 10:50 AM
> *To:* Neil Campbell
> *Cc:* ocfs2-users at oss.oracle.com
> *Subject:* Re: [Ocfs2-users] Random node reboots
>
> It's the other way round. These message indicate that the other node
> died. When these nodes detect that, they need to do recovery/cleanup.
> The messages all relate to that activity.
>
> The reason as to why the first node died will only be known once we have
> the oops trace. And that is caught by netdump/netconsole.
>
> On 12/07/2010 03:37 PM, Neil Campbell wrote:
>
> Hi Sunil,
>
> Thanks for responding.
>
> It is being evicted by the other nodes in the OCFS2 cluster isn't it?
>
> /var/log/messages from dcapp02 shows
>
> Dec 8 01:56:01 dcapp02 kernel: o2net: connection to node dcapp01 (num 0) at 10.255.255.1:10007 has been idle for 60.0 seconds, shutting it down.
>
> This appears in all the other messages files of the nodes in the cluster (except the one that got re-booted).
>
> So that is why dcapp01 got shutdown isn't it? What I think I need help with is why ?
>
> Many thanks
>
> Neil
>
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> *From:*Sunil Mushran [mailto:sunil.mushran at oracle.com]
> *Sent:* Wednesday, 8 December 2010 10:32 AM
> *To:* Neil Campbell
> *Cc:* ocfs2-users at oss.oracle.com <mailto:ocfs2-users at oss.oracle.com>
> *Subject:* Re: [Ocfs2-users] Random node reboots
>
> ==> /var/log/messages from the node being rebooted doesn't show anything, just the to reboot shows the following
>
> That's how Linux works. You should configure netconsole or netdump
> to capture the logs. Only then we'll know as to why the node is panic-ing.
>
>
> On 12/07/2010 03:27 PM, Neil Campbell wrote:
>
> Hi all,
>
> I keep getting node reboots across my cluster, it seems random in that the node being evicted changes
> and in that it happens every now an then. I'm running RHEL 4 kernel 2.6.89.0.26.ELsmp,
> and OCFS is OCFS2 1.2.9 Mon Jun 21 20:03:07 PDT 2010 (build 5e8325ec7f66b5189c65c7a8710fe8cb)
>
> I am using OCFS2 as a general purpose filesystem (i.e not forOracle datafiles or OCR etc),
> with the following entries in /etc/fstab
>
> /dev/emcpowera1 /u01/cfs ocfs2 _netdev 0 0
>
> As a general purpose filesystem, should I be using the nointr mount option?
>
> /etc/init.d/o2cb status
>
> Module "configfs": Loaded
> Filesystem "configfs": Mounted
> Module "ocfs2_nodemanager": Loaded
> Module "ocfs2_dlm": Loaded
> Module "ocfs2_dlmfs": Loaded
> Filesystem "ocfs2_dlmfs": Mounted
> Checking O2CB cluster UATocfs2: Online
> Heartbeat dead threshold: 61
> Network idle timeout: 60000
> Network keepalive delay: 2000
> Network reconnect delay: 2000
> Checking O2CB heartbeat: Active
>
> /var/log/messages from the node being rebooted doesn't show anything, just the to reboot shows the following
>
> Dec 8 00:59:02 dcapp01 syslogd 1.4.1: restart.
>
> On the other nodes, I see the following entries
>
> Dec 8 01:56:01 dcapp02 kernel: o2net: connection to node dcapp01 (num 0) at 10.255.255.1:10007 has been idle for 60.0 seconds, shutting it down.
> Dec 8 01:56:01 dcapp02 kernel: (0,3):o2net_idle_timer:1426 here are some times that might help debug the situation: (tmr 1291733701.691575 now 1291733761.692608 dr 1291733701.690949 adv 1291733701.696965:1291733701.696967 func (d399da91:500) 1291733701.691576:1291733701.696950)
> Dec 8 01:56:01 dcapp02 kernel: o2net: no longer connected to node dcapp01 (num 0) at 10.255.255.1:10007
> Dec 8 01:57:01 dcapp02 kernel: (16082,3):o2net_connect_expired:1585 ERROR: no connection established with node 0 after 60.0 seconds, giving up and returning errors.
> Dec 8 01:57:01 dcapp02 kernel: (4215,2):dlm_send_remote_convert_request:398 ERROR: status = -107
> Dec 8 01:57:01 dcapp02 kernel: (4215,2):dlm_wait_for_node_death:365 C5C06C9B675D41B99B60DE2EB28CE0F7: waiting 5000ms for notification of death of node 0
> Dec 8 01:57:04 dcapp02 kernel: (16082,3):ocfs2_dlm_eviction_cb:119 device (120,1): dlm has evicted node 0
> Dec 8 01:57:05 dcapp02 kernel: (4269,0):dlm_send_remote_convert_request:398 ERROR: status = -107
> Dec 8 01:57:05 dcapp02 kernel: (4269,0):dlm_wait_for_node_death:365 D43AF814A25845F7B103EBBEA440BA18: waiting 5000ms for notification of death of node 0
> Dec 8 01:57:05 dcapp02 kernel: (16082,3):ocfs2_dlm_eviction_cb:119 device (120,66): dlm has evicted node 0
> Dec 8 01:57:06 dcapp02 kernel: (16082,3):ocfs2_dlm_eviction_cb:119 device (120,65): dlm has evicted node 0
> Dec 8 02:00:15 dcapp02 kernel: o2net: connected to node dcapp01 (num 0) at 10.255.255.1:10007
> Dec 8 02:00:29 dcapp02 kernel: ocfs2_dlm: Node 0 joins domain C5C06C9B675D41B99B60DE2EB28CE0F7
> Dec 8 02:00:29 dcapp02 kernel: ocfs2_dlm: Nodes in domain ("C5C06C9B675D41B99B60DE2EB28CE0F7"): 0 1 2 3 6 7 8 9 10 11 14 15
> Dec 8 02:00:35 dcapp02 kernel: ocfs2_dlm: Node 0 joins domain 97F22666B5A6494AAF38C53909275DB2
> Dec 8 02:00:35 dcapp02 kernel: ocfs2_dlm: Nodes in domain ("97F22666B5A6494AAF38C53909275DB2"): 0 1 2 3
> Dec 8 02:00:39 dcapp02 kernel: ocfs2_dlm: Node 0 joins domain D43AF814A25845F7B103EBBEA440BA18
> Dec 8 02:00:39 dcapp02 kernel: ocfs2_dlm: Nodes in domain ("D43AF814A25845F7B103EBBEA440BA18"): 0 1 2 3
>
> I would really appreciate some help with this, as I'm not sure where to go from here.
>
> Thanks
> Neil
>
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>
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