<div dir="ltr">Thanks, but am only using ext4 on both nodes </div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Oct 15, 2015 at 3:27 PM, Trevor Hemsley <span dir="ltr"><<a href="mailto:themsley@voiceflex.com" target="_blank">themsley@voiceflex.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><span class="">
<div>On 15/10/15 13:02, Ammar Sheikh Saleh
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">When ==> <span style="color:rgb(0,0,0);font-size:12.8px">During normal
operation</span></div>
</blockquote>
<br></span>
Are you attempting to use ext3/4 on both nodes at the same time? <br><span class="">
<br>
<blockquote type="cite">
<div dir="ltr">
<div><span style="color:rgb(0,0,0);font-size:12.8px"><br>
</span></div>
<div><span style="color:rgb(0,0,0);font-size:12.8px">What's the
IO stack below DRBD ==> 4 Disks in JBOD</span><span style="color:rgb(0,0,0);font-size:12.8px"><br>
</span></div>
<div><span style="color:rgb(0,0,0);font-size:12.8px"><br>
</span></div>
<div><span style="color:rgb(0,0,0);font-size:12.8px">Kernel
upgrade is not possible now ... but at the same time its
not too old ( v.</span><font color="#000000"><span style="font-size:12.8px">2.6.32-431.20.3)</span></font></div>
</div>
</blockquote>
<br></span>
That kernel belongs to CentOS/RHEL 6.5 which is now approaching 2
years old and has numerous security vulnerabilities present.<br>
<br>
<blockquote type="cite"><div><div class="h5">
<div dir="ltr">
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Oct 15, 2015 at 2:34 PM, Lars
Ellenberg <span dir="ltr"><<a href="mailto:lars.ellenberg@linbit.com" target="_blank">lars.ellenberg@linbit.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On Thu, Oct 15, 2015 at 12:32:11PM +0300, Ammar
Sheikh Saleh wrote:<br>
> Hi all,<br>
><br>
> I have one cluster with 2 nodes in active-active -
master/slave setup<br>
><br>
> I see the following error messages in the system
logs:<br>
<br>
</span>*when*.<br>
<br>
After a hard crash?<br>
After a simulated Crash?<br>
After a switchover?<br>
After a failover?<br>
During normal operation?<br>
<br>
What's the IO stack below DRBD?<br>
<span><br>
> Jan 5 11:07:23 lws1h1 kernel: EXT4-fs error (device
drbd1): ext4_mb_generate_buddy: EXT4-fs: group 3785: 27507
blocks in bitmap, 27576 in gd<br>
> Jan 5 11:07:53 lws1h1 kernel: EXT4-fs error (device
drbd1): ext4_mb_generate_buddy: EXT4-fs: group 2437: 9219
blocks in bitmap, 32546 in gd<br>
> Jan 5 11:07:53 lws1h1 kernel: EXT4-fs error (device
drbd1): ext4_mb_generate_buddy: EXT4-fs: group 2438: 9075
blocks in bitmap, 32760 in gd<br>
> Jan 5 11:07:53 lws1h1 kernel: EXT4-fs error (device
drbd1): ext4_mb_generate_buddy: EXT4-fs: group 2442: 9078
blocks in bitmap, 32768 in gd<br>
> Jan 5 20:18:27 lws1h1 kernel: JBD: Spotted dirty
metadata buffer (dev = drbd1, blocknr = 0). There's a risk
of filesystem corruption in case of system crash.<br>
> Jan 5 22:02:18 lws1h1 kernel: EXT4-fs error (device
drbd1): ext4_mb_generate_buddy: EXT4-fs: group 3795: 32532
blocks in bitmap, 29780 in gd<br>
> Jan 5 22:02:19 lws1h1 kernel: JBD: Spotted dirty
metadata buffer (dev = drbd1, blocknr = 0). There's a risk
of filesystem corruption in case of system crash.<br>
><br>
> What is the appropriate action to fix this issue<br>
<br>
</span>Did you even google for the message?<br>
"JBD: Spotted dirty metadata buffer" turns up several
bugzillas from<br>
2010 and 2012, suggesting kernel upgrade would help.<br>
<span><font color="#888888"><br>
<br>
--<br>
: Lars Ellenberg<br>
: <a href="http://www.LINBIT.com" rel="noreferrer" target="_blank">http://www.LINBIT.com</a> | Your Way
to High Availability<br>
: DRBD, Linux-HA and Pacemaker support and consulting<br>
<br>
DRBD® and LINBIT® are registered trademarks of LINBIT,
Austria.<br>
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