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<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">Hello All.</span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">I am just explaining the problem in more detail to make sure that everybody understands what problem i have been facing.</span><u></u><u></u></p>
<p class="MsoNormal"><br>
<br>
<u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">Let’s have an example.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">A server – ACTIVE , B server – STANBY
</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">Our product uses DRBD to replicate DISK data ( like MySQL config data, disk file) from A server ( where Application processes are running, Here DRBD in primary
state) to B server( where Application are not running but has same data as Active server has, here DRBD in secondary state). Now A server goes into the STANDBY state(DRBD goes into the SECONDAY state)because due to some problem and B server goes to ACTIVE
state(DRBD goes into the PRIMARY state). During this switchover: server A goes from ACTIVE->STANDBY and DRBD on server A is going into the PRIMARY-> SECONDAY state, during that drbd checks open_cnt is greater than 0 (Here it should have been 0). Then it
will display the error “State change failed: (-12) Device is held open by someone”)”.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">The below error messages are printed in the log file by DRBD code.</span><u></u><u></u></p>
<p class="MsoNormal"><i><span style="background: silver none repeat scroll 0% 0%; font-size: 8pt; color: navy; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;">Jun 23 07:08:11 abaco-a kernel: drbd0: State change failed: Device is held open by someone</span></i><u></u><u></u></p>
<p class="MsoNormal"><i><span style="background: silver none repeat scroll 0% 0%; font-size: 8pt; color: navy; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;">Jun 23 07:08:11 abaco-a kernel: drbd0: state = { cs:Connected st:Primary/Secondary ds:UpToDate/UpToDate r--- }</span></i><u></u><u></u></p>
<p class="MsoNormal"><i><span style="background: silver none repeat scroll 0% 0%; font-size: 8pt; color: navy; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;">Jun 23 07:08:11 abaco-a kernel: drbd0: wanted = { cs:Connected st:Secondary/Secondary ds:UpToDate/UpToDate r--- }</span></i><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">I have no idea what could be the problem here?</span><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">Regards,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 10pt; color: navy;">Dileep Nayak</span><u></u><u></u></p>
<p class="MsoNormal"><i><span style="font-size: 8pt; color: navy;"><u></u> <u></u></span></i></p>
<p class="MsoNormal"><i><span style="font-size: 8pt;"> <u></u><u></u></span></i></p>
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