<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Hi,</div><div><br></div><div><br></div><div>I have a problem, which (from what I found) has been discussed, however not in the particular case, which I experienced, so I would be grateful for any suggestions of how to deal with it.</div><div><br></div><div><br></div><div>I.<br></div><div>1. I get an error when demoting DRBD resource:</div><div>* drbdadm down data0</div><div><br></div><div>data0: State change failed: (-12) Device is held open by someone<br>additional info from kernel:<br>failed to demote<br>Command 'drbdsetup-84 down data0' terminated with exit code 11<br></div><div><br></div><div>2. The device is not mounted and not used by any LVM, so based on some online discussions I checked the blocking process and it is "drbd0_submit"</div><div><br></div><div>* lsof | grep drbd0<br>drbd0_sub 16687        root cwd      DIR             202,1      251        64 /<br>drbd0_sub 16687        root rtd      DIR             202,1      251        64 /<br>drbd0_sub 16687        root txt  unknown                                        /proc/16687/exe<br><br></div><div>* ps auxf<br>root    16687 0.0 0.0     0    0 ?       S<  15:19  0:00 \_ [drbd0_submit]<br></div><div><br></div><div>Is there a good way to deal with this case, as whether some DRBD step is missing, which leaves the process or killing the process is the right way?</div><div><br></div><div>Thanks in advance,</div><div><br></div><div><br></div><div>II.<br></div><div>Some details:</div><div><br></div><div>1)<br></div><div>[root@ip-10-29-97-230 ~]# lsblk<br></div><div>xvdb       202:16  0  10G 0 disk <br>└─md0        9:0   0  20G 0 raid0 <br> ├─md0p1  259:0   0 9.9G 0 md   <br> │ └─drbd0 147:0   0 9.9G 0 disk <br> └─md0p2  259:1   0 10.1G 0 md   <br>xvdc       202:32  0  10G 0 disk <br>└─md0        9:0   0  20G 0 raid0 <br> ├─md0p1  259:0   0 9.9G 0 md   <br> │ └─drbd0 147:0   0 9.9G 0 disk <br> └─md0p2  259:1   0 10.1G 0 md   <br></div><div><br></div><div><br></div><div>2)<br></div><div>[root@ip-10-29-97-230 ~]# drbd-overview <br>NOTE: drbd-overview will be deprecated soon.<br>Please consider using drbdtop.<br><br> 0:data0/0 WFConnection Primary/Unknown UpToDate/DUnknown <br> 1:data1/0 Unconfigured .   </div><div><br></div><div><br></div><div>[root@ip-10-29-101-160 ~]# drbd-overview <br>NOTE: drbd-overview will be deprecated soon.<br>Please consider using drbdtop.<br><br> 0:data0/0 Unconfigured . . <br> 1:data1/0 Unconfigured . . <br></div><div><br></div><div><br></div><div>3)<br></div><div>[root@ip-10-29-97-230 ~]# drbdadm dump data0<br># resource data0 on ip-10-29-97-230.ec2.internal: not ignored, not stacked<br># defined at /etc/drbd.d/data0.res:55<br>resource data0 {<br>   on ip-10-29-97-230.ec2.internal {<br>       device          /dev/drbd0 minor 0;<br>       disk            /dev/md0p1;<br>       meta-disk       internal;<br>       address         ipv4 <a href="http://10.29.97.230:7789">10.29.97.230:7789</a>;<br>   }<br>   on ip-10-29-101-160.ec2.internal {<br>       device          /dev/drbd0 minor 0;<br>       disk            /dev/md0p2;<br>       meta-disk       internal;<br>       address         ipv4 <a href="http://10.29.101.160:7790">10.29.101.160:7790</a>;<br>   }<br>   options {<br>       cpu-mask          0;<br>       on-no-data-accessible io-error;<br>   }<br>   net {<br>       protocol          C;<br>       sndbuf-size       0;<br>       rcvbuf-size       0;<br>       max-buffers     2048;<br>       max-epoch-size  2048;<br>       unplug-watermark 128;<br>       use-rle         yes;<br>       tcp-cork        yes;<br>       verify-alg       "";<br>       connect-int      10;<br>       ping-int         10;<br>       ping-timeout      8;<br>       timeout          60;<br>   }<br>   disk {<br>       on-io-error     call-local-io-error;<br>       resync-rate     1000M;<br>       c-plan-ahead      0;<br>       c-fill-target    1M;<br>       c-delay-target    1;<br>       c-min-rate        0;<br>       c-max-rate      1000M;<br>       disk-barrier     no;<br>       disk-flushes    yes;<br>       disk-drain      yes;<br>       al-extents      1237;<br>       read-balancing  prefer-local;<br>       md-flushes      yes;<br>       max-bio-bvecs     0;<br>   }<br>   startup {<br>       become-primary-on ip-10-29-97-230.ec2.internal;<br>   }<br>}<br></div><div><br></div><div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Best Regards,<br><br>Radoslaw Garbacz<br></div>XtremeData Incorporated<br></div></div></div></div>
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