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On 06/05/2012 11:23 AM, Guozhonghua wrote:
<blockquote
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<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Hi</span>，<span lang="EN-US"> I am using
ocfs2 for test and find one issue, would someone give
some help about it.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">The background is that we are using ocfs2
over iSCSI on Ubuntu 12.04, with kernel version
3.2.0-23. </span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Linux 3.2.0-23-generic x86_64 GNU/Linux</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">We changed the configuration file of
iSCSI, initiatorname.iscsi file, so as to restart the
iSCSI service with the command "service open-iscsi
restart".</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">After the restart of iscsi service, the
device that ocfs2 using is missed, and the log is
written to kern.log as below: </span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Jun 5 09:10:06 vmc-7 kernel:
[45946.187897] sd 6:0:0:13: [sde] Attached SCSI disk</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Jun 5 09:10:07 vmc-7 kernel:
[45946.439225]
(o2hb-692FC96E2F,2786,5):o2hb_bio_end_io:389 ERROR: IO
Error -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Jun 5 09:10:07 vmc-7 kernel:
[45946.439673]
(o2hb-692FC96E2F,2786,5):o2hb_do_disk_heartbeat:1017
ERROR: status = -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Jun 5 09:10:07 vmc-7 kernel:
[45947.117979]
(o2hb-58592532BC,2804,2):o2hb_bio_end_io:389 ERROR: IO
Error -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Jun 5 09:10:07 vmc-7 kernel:
[45947.118413]</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">... ... .... ...</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">
(o2hb-58592532BC,2804,0):o2hb_bio_end_io:389 ERROR: IO
Error -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">Jun 5 09:10:53 vmc-7 kernel:
[45993.143578]
(o2hb-58592532BC,2804,0):o2hb_do_disk_heartbeat:1017
ERROR: status = -19</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US"></span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">The heartbeat timeout is 31 seconds
configured as below.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US"># O2CB_HEARTBEAT_THRESHOLD: Iterations
before a node is considered dead.</span></span></span></font></p>
<p class="MsoPlainText" style="text-indent: 18pt;"><font
face="宋体" size="1"><span style="font-size: 9pt; line-height:
150%;"><span style="line-height: 150%;"> <span
lang="EN-US">O2CB_HEARTBEAT_THRESHOLD=31</span></span></span></font></p>
</div>
</blockquote>
O2CB_HEARTBEAT_THRESHOLD = 31 means time out is 60 seconds, not 31
seconds.<br>
You can read the ocfs2 faq about this:<br>
O2CB_HEARTBEAT_THRESHOLD = (((timeout in secs) / 2) + 1)<br>
<br>
Tiger<br>
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