[DRBD-user] drbd-0.7.15 one primary device got locked in BrokenPipestatus forbidding all i/o operations.

Diego Liziero diego.liziero at comune.carpi.mo.it
Mon Jan 30 11:25:01 CET 2006

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

I forgot to say that all the drdb devices are synced
between the 2 nodes through a cross cable.

The latest stable version for our busy smp cluster seems to be

Another strange thing happens with drbd-0.7.15:
2 or 3 of the 6 drbd devices, when switching from
primary to secondary while mounted,
drbd complains that there is some i/o in use,
even if the command fuser doesn't show any
process using them.

This didn't happen with drbd-0.7.11,
and happens with drbd-0.7.15 only after some days
of use of the primary partitions and only for
some of them.

Is it a wanted behaviour?

On Sat, 2006-01-21 at 08:20, Diego Liziero wrote:
> One of our primary drbd devices (/dev/drbd2) got in BrokenPipe status,
> and all processes accessing their files (mostly ldap and mysql)
> got frozen, unkillable even with -9.
> This didn't permit us to switch /dev/drbd into secondary,
> we had to reboot the primary node.
> Any hint?
> Kernel: 2.4.21-37.EL (rhel3.02)
> cat /proc/drbd (now that it's working, after the reboot)
> version: 0.7.15 (api:77/proto:74)
> SVN Revision: 2020 build by [..], 2005-12-21 18:55:34
>  0: cs:Connected st:Primary/Secondary ld:Consistent
>     ns:38904 nr:148 dw:39052 dr:525 al:4 bm:1 lo:0 pe:0 ua:0 ap:0
>  1: cs:Connected st:Primary/Secondary ld:Consistent
>     ns:328612 nr:86164 dw:414776 dr:128877 al:537 bm:118 lo:0 pe:0 ua:0
> ap:0
>  2: cs:Connected st:Primary/Secondary ld:Consistent
>     ns:88544 nr:21716 dw:110260 dr:50253 al:0 bm:35 lo:0 pe:0 ua:0 ap:0
>  3: cs:Connected st:Primary/Secondary ld:Consistent
>     ns:31700 nr:8304 dw:40004 dr:4349 al:10 bm:54 lo:0 pe:0 ua:0 ap:0
>  4: cs:Connected st:Primary/Secondary ld:Consistent
>     ns:228 nr:208 dw:436 dr:1449 al:0 bm:2 lo:0 pe:0 ua:0 ap:0
>  5: cs:Connected st:Primary/Secondary ld:Consistent
>     ns:1567340 nr:2024004 dw:3591344 dr:4765217 al:11799 bm:955 lo:0
> pe:0 ua:0 ap:0
> before the reboot /dev/drbd2 was FWConnection st:Primary/BrokenPipe
> attached our drdb syslog entries.
> Regards,
> Diego.
> ______________________________________________________________________

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