<font size=2 face="sans-serif">Good day!</font>
<br>
<br><font size=2 face="sans-serif">Recently we have installed Xymon 4.3.30
on new VM (CentOS Linux release 7.7.1908 (Core) - guest under KVM</font>
<br><font size=2 face="sans-serif">Guest Kernel: 3.10.0-1062.1.1.el7.x86_64
#1 SMP Fri Sep 13 22:55:44 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux</font>
<br>
<br><font size=2 face="sans-serif">All OK, except xymond_rrd is crashing
frequently - the "xymond_rrd" metric is always red (was
never green) with message:</font>
<br><font size=2 face="sans-serif"> - Program crashed</font>
<br><font size=2 face="sans-serif">Fatal signal caught!</font>
<br>
<br><font size=2 face="sans-serif">In rrd-status.log we can find frequent
messages like:</font>
<br>
<br><font size=2 face="sans-serif">2019-10-14 14:35:03.609265 Child process
2997 died: Signal 6</font>
<br><font size=2 face="sans-serif">2019-10-14 14:35:04.239677 Peer at 0.0.0.0:0
failed: Broken pipe</font>
<br><font size=2 face="sans-serif">2019-10-14 14:35:08.886124 Peer not
up, flushing message queue</font>
<br><font size=2 face="sans-serif">2019-10-14 14:36:45.883398 Host 'synologyhost.domain.eu'
reports netstat for an unknown OS</font>
<br><font size=2 face="sans-serif">2019-10-14 14:36:45.888875 Child process
21622 died: Signal 6</font>
<br><font size=2 face="sans-serif">2019-10-14 14:36:52.510319 Peer at 0.0.0.0:0
failed: Broken pipe</font>
<br><font size=2 face="sans-serif">2019-10-14 14:36:52.510720 Peer not
up, flushing message queue</font>
<br><font size=2 face="sans-serif">2019-10-14 14:40:02.689062 Host 'synologyhost.domain.eu'
reports netstat for an unknown OS</font>
<br><font size=2 face="sans-serif">2019-10-14 14:40:02.694320 Child process
28158 died: Signal 6</font>
<br><font size=2 face="sans-serif">2019-10-14 14:40:05.119354 Peer at 0.0.0.0:0
failed: Broken pipe</font>
<br><font size=2 face="sans-serif">2019-10-14 14:40:05.250422 Peer not
up, flushing message queue</font>
<br>
<br><font size=2 face="sans-serif">Note: lines like "Host 'synologyhost.domain.eu'
reports netstat for an unknown OS" are comining from Synonlogy NAS
with Monitoring package installed.</font>
<br><font size=2 face="sans-serif">I am sure it is not related - it was
working on old Xymon 4.3.17 (CentOS 6.6)</font>
<br>
<br><font size=2 face="sans-serif">After fresh installation we just remapped
(with symbolic link) the data directory to continue employ old data logs
and rra.</font>
<br>
<br><font size=2 face="sans-serif">There is plenty of core files under
server/tmp/</font>
<br><font size=2 face="sans-serif">srw-rw-rw- 1 xymon monitor
0 Oct 14 14:40 rrdctl.572</font>
<br><font size=2 face="sans-serif">-rw------- 1 xymon monitor 3252224 Oct
14 14:45 core.572</font>
<br><font size=2 face="sans-serif">srw-rw-rw- 1 xymon monitor
0 Oct 14 14:45 rrdctl.17027</font>
<br><font size=2 face="sans-serif">-rw------- 1 xymon monitor 3248128 Oct
14 14:50 core.17027</font>
<br><font size=2 face="sans-serif">srw-rw-rw- 1 xymon monitor
0 Oct 14 14:50 rrdctl.30574</font>
<br><font size=2 face="sans-serif">-rw------- 1 xymon monitor 3248128 Oct
14 14:55 core.30574</font>
<br><font size=2 face="sans-serif">srw-rw-rw- 1 xymon monitor
0 Oct 14 14:55 rrdctl.13275</font>
<br><font size=2 face="sans-serif">-rw------- 1 xymon monitor 3239936 Oct
14 15:00 core.13275</font>
<br><font size=2 face="sans-serif">-rw-r--r-- 1 xymon monitor 1887355 Oct
14 15:02 xymond.chk</font>
<br><font size=2 face="sans-serif">-rw-r--r-- 1 xymon monitor
0 Oct 14 15:02 alert.chk.sub</font>
<br><font size=2 face="sans-serif">-rw-r--r-- 1 xymon monitor 70921
Oct 14 15:02 alert.chk</font>
<br><font size=2 face="sans-serif">srw-rw-rw- 1 xymon monitor
0 Oct 14 15:02 rrdctl.5887</font>
<br><font size=2 face="sans-serif">srw-rw-rw- 1 xymon monitor
0 Oct 14 15:02 rrdctl.5954</font>
<br><font size=2 face="sans-serif">-rw------- 1 xymon monitor 3764224 Oct
14 15:05 core.5887</font>
<br><font size=2 face="sans-serif">srw-rw-rw- 1 xymon monitor
0 Oct 14 15:05 rrdctl.10234</font>
<br>
<br>
<br><font size=2 face="sans-serif">Question: How can we diagnose what is
the cause of the problem?</font>
<br>
<br>
<br>
<br><font size=2 face="Verdana">Best regards,</font>
<br>
<br><font size=2 face="Verdana">Andrey Chervonets</font>
<br><font size=2 face="Verdana">----------------------</font>
<br><font size=2 face="Verdana">SIA CoMinder</font>
<br><a href=http://www.cominder.eu/><font size=2 color=blue face="Verdana">http://www.cominder.eu/</font></a>
<br><font size=2 face="Verdana">mobile: +371 26517848</font>