[DRBD-user] Both nodes UpToDate but "bitmap WRITE of 0 pages took 0 jiffies" "marked out-of-sync by on disk bit-map"

Maulviridha Abu Bakar maulvi at gmail.com
Sat Apr 25 19:39:36 CEST 2015

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


Hello All

I am still using Heartbeat but I am in a bit of a jiffy.

Our primary node host "01" recently had a full root-filesystem incident
that forces us to relocate the active node to host "02".  The switch was
successful.

After housekeeping, we are prepared to swing back to host "01". To be on
the safe side, we stopped all services on host "02" and started it on "01".

The error we encountered was marked under "kernel" for DRBD mentioning that
the block devices are "bitmap WRITE of 0 pages took 0 jiffies" and "marked
out-of-sync by on disk bit-map".

However, the status from "cat /proc/drbd" both shows "Connected" and
"UpToDate" status on both nodes.

Numerous attempts failed and it was decided to start it back to host "02"
and it works like a charm.

I am wondering what may be the cause that it fails to start on host "01".
I hope someone are able to shed some light on this anomaly -


version: 8.4.5 (api:1/proto:86-101)
GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by phil at Build64R6,
2014-10-28 10:32:53
 0: cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate C r-----
    ns:532 nr:0 dw:532 dr:6954 al:5 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
 1: cs:Connected ro:Secondary/Secondary ds:UpToDate/UpToDate C r-----
    ns:348 nr:0 dw:348 dr:22055 al:5 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f
oos:0


Apr 26 01:05:22 icewarp01 ResourceManager(default)[41174]: info: Running
/etc/ha.d/resource.d/drbddisk r1 stop
Apr 26 01:05:22 icewarp01 kernel: block drbd1: role( Primary -> Secondary )
Apr 26 01:05:22 icewarp01 kernel: block drbd1: bitmap WRITE of 0 pages took
0 jiffies
Apr 26 01:05:22 icewarp01 kernel: block drbd1: 0 KB (0 bits) marked
out-of-sync by on disk bit-map.
Apr 26 01:05:22 icewarp01 ResourceManager(default)[41174]: info: Running
/etc/ha.d/resource.d/Filesystem /dev/drbd0 /var/lib/mysql ext4 stop
Apr 26 01:05:23 icewarp01 Filesystem(Filesystem_/dev/drbd0)[42351]: INFO:
Running stop for /dev/drbd0 on /var/lib/mysql
Apr 26 01:05:23 icewarp01 Filesystem(Filesystem_/dev/drbd0)[42351]: INFO:
Trying to unmount /var/lib/mysql
Apr 26 01:05:23 icewarp01 Filesystem(Filesystem_/dev/drbd0)[42351]: INFO:
unmounted /var/lib/mysql successfully
Apr 26 01:05:23 icewarp01
/usr/lib/ocf/resource.d//heartbeat/Filesystem(Filesystem_/dev/drbd0)[42340]:
INFO:  Success
Apr 26 01:05:23 icewarp01 ResourceManager(default)[41174]: info: Running
/etc/ha.d/resource.d/drbddisk r0 stop
Apr 26 01:05:23 icewarp01 kernel: block drbd0: role( Primary -> Secondary )
Apr 26 01:05:23 icewarp01 kernel: block drbd0: bitmap WRITE of 0 pages took
0 jiffies
Apr 26 01:05:23 icewarp01 kernel: block drbd0: 0 KB (0 bits) marked
out-of-sync by on disk bit-map.


Sincere regards and thanks

Maulvi Bakar
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