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<p class="MsoNormal"><span style="color:#1F497D">Thanks, Japheph!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In fact, I did have a number of semaphores that remained in memory after all Xymon processes had exited… (BTW: same “ipcs -a” to view in Solaris). I don’t know if it was coincidence or causal, but w/in a couple
of hours of removing, the system was locked up and I had to reboot.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Now I can start up Xymon and exit without leaving semaphores littering the landscape. However, I have two new symptoms:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">The xymonnet and xymonetagain daemons refuse to exit when I run the “xymon.sh stop” script. They just continue to run, growing in memory constantly (I ran “truss” against xymonnet and it just kept calling
brk(…) – successfully – again and again, etc.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">The xymongen daemon does not regenerate a new $HOME/xymon/server/www/ directory if I remove the old one. There is no new updates to the old directory that I can see either.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I’m going to have Oracle take a look at the host to make sure there isn’t something wrong with the OS. I’m kind of stuck and would be grateful for any debugging suggestions…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">TIA!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">david<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Japheth Cleaver [mailto:cleaver@terabithia.org]
<br>
<b>Sent:</b> Friday, November 18, 2016 11:53 AM<br>
<b>To:</b> Mills,David (HHSC Contractor); 'xymon@xymon.com'<br>
<b>Subject:</b> Re: [Xymon] xymond not accepting connections<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">This is (probably) a sign that you have stuck SysV IPC semaphores, probably from the previous crash.<br>
<br>
The fix is to stop all xymon/hobbit processes, and then remove the hobbit-owned IPC stuff manually. On Linux, you'd run ipcs -a to find any segments (also, queues and arrays) owned by the xymon/hobbit user and use ipcrm to remove them.<br>
<br>
ipcs output on a running system will look something like this:<br>
<br>
<o:p></o:p></p>
<pre>------ Shared Memory Segments --------<o:p></o:p></pre>
<pre>key shmid owner perms bytes nattch status <o:p></o:p></pre>
<pre>0x010045d6 0 xymon 600 262144 4 <o:p></o:p></pre>
<pre>0x020045d6 32769 xymon 600 262144 2 <o:p></o:p></pre>
<pre>0x030045d6 65538 xymon 600 262144 2 <o:p></o:p></pre>
<pre>0x040045d6 98307 xymon 600 262144 3 <o:p></o:p></pre>
<pre>0x050045d6 131076 xymon 600 262144 2 <o:p></o:p></pre>
<pre>0x060045d6 163845 xymon 600 32768 2 <o:p></o:p></pre>
<pre>0x070045d6 196614 xymon 600 26214400 3 <o:p></o:p></pre>
<pre>0x080045d6 229383 xymon 600 26214400 2 <o:p></o:p></pre>
<pre>0x090045d6 262152 xymon 600 131072 1 <o:p></o:p></pre>
<p class="MsoNormal">I'm not sure if the commands are the same on Solaris (don't have a Sun box handy at the moment), but once those are gone things should start back up.<br>
<br>
This is reduced to an error in 4.x instead of an abort, but the behavior is still undefined since it's easy for xymond to get into a deadlock with pre-existing semaphores set, while we wait for a message to be picked up by a process that may not exist.<br>
<br>
<br>
HTH,<br>
-jc<br>
<br>
<br>
On 11/18/2016 8:53 AM, Mills,David (HHSC Contractor) wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="color:#1F497D">OK… This is new: more details from xymonlaunch.log file:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span>
<span style="font-family:"Courier New ;color:#1F497D","serif"">…</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:34 Loading saved state</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Setting up network listener on 0.0.0.0:1984</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Setting up signal handlers</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Setting up xymond channels</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 FATAL: xymond sees clientcount 2, should be 0</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> Check for hanging xymond_channel processes or stale semaphores</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Cannot setup data channel</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Task xymond terminated, status 1</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Task xymongen terminated by signal 15</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Task xymonnet terminated by signal 15</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:13:59 Loading hostnames</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:14:39 xgetenv: Cannot find value for variable HOME</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:17:41 xgetenv: Cannot find value for variable HOME</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:20:40 xgetenv: Cannot find value for variable HOME</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> 2016-11-18 07:23:30 Task xymonnetagain terminated, status 208</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New ;color:#1F497D","serif""> …</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">The above lines pretty much cycle endlessly.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Xymon [<a href="mailto:xymon-bounces@xymon.com">mailto:xymon-bounces@xymon.com</a>]
<b>On Behalf Of </b>Mills,David (HHSC Contractor)<br>
<b>Sent:</b> Thursday, November 17, 2016 5:17 PM<br>
<b>To:</b> '<a href="mailto:xymon@xymon.com">xymon@xymon.com</a>'<br>
<b>Subject:</b> [Xymon] xymond not accepting connections</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Hi, all!<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">We have a rather murky situation. A colleague accidentally completely removed the Xymon (4.3.3 / Solaris) server home directory recently. It was restored from backups, but since then that server has not been completely functioning. (‘Don’t
know if our symptoms are related to the home dir “zap” or what…)<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">We periodically run the ghostlist.cgi app from cron and now these instances sometimes don’t exit. When I run truss on them, I see they are almost continuously calling brk(): allocating anonymous memory for that instance’s heap. It’s gotten
so bad that we’ve had this server’s resources completely depleted and now have had to turn off the cron jobs<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The xymond daemon is no longer accepting connections, despite the fact that this server has been stable for years.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> The system was rebooted last night and seemed to be functioning throughout the night but stopped updating around 7:30 AM<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> Confirmed xymond is no longer accepting connections via:<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> 17:03:49 pwsu020:/var/log/xymon> telnet 127.0.0.1 1984<o:p></o:p></p>
<p class="MsoNormal"> Trying 127.0.0.1...<o:p></o:p></p>
<p class="MsoNormal"> telnet: Unable to connect to remote host: Connection refused<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"> <o:p></o:p></p>
<p class="MsoNormal"> 17:02:53 pwsu020:/var/log/xymon> ps -u hobbit -f<o:p></o:p></p>
<p class="MsoNormal"> UID PID PPID C STIME TTY TIME CMD<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4132 4131 1 17:02:36 ? 0:26 xymond --pidfile=/var/log/xymon/xymond.pid --restart=/export/xymon/server/tmp/x<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4288 4279 0 17:03:01 ? 0:01 /usr/bin/perl -w /usr/local/devmon/devmon<o:p></o:p></p>
<p class="MsoNormal"> hobbit 12895 12867 0 10:54:01 pts/5 0:00 -bash<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4278 1908 0 17:03:00 ? 0:00 sh -c /usr/local/devmon/bin/restart.devmon> /dev/null 2>&1<o:p></o:p></p>
<p class="MsoNormal"> hobbit 12491 5466 0 03:10:04 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 12490 5466 0 03:10:04 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 12487 5466 0 03:10:04 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 15958 5466 0 11:20:04 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 15612 5466 0 11:17:01 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 17158 5466 0 03:45:03 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 12488 5466 0 03:10:04 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 12489 5466 0 03:10:04 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4290 4289 0 17:03:01 ? 0:01 /usr/bin/perl -w /usr/local/devmon/devmon<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4257 4143 0 17:02:46 ? 0:00 /home/hobbit/xymon/client/bin/xymon 0.0.0.0 @<o:p></o:p></p>
<p class="MsoNormal"> hobbit 15776 5466 0 11:18:51 ? 0:00 /usr/local/apache2/bin/httpd -k start<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4148 4141 1 17:02:41 ? 0:21 /export/xymon/server/bin/xymonnet --ping --checkresponse --timeout=10 --dns-tim<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4279 4278 0 17:03:01 ? 0:00 /bin/ksh /usr/local/devmon/bin/restart.devmon<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4135 4131 0 17:02:41 ? 0:00 xymond_channel --channel=client --log=/var/log/xymon/clientdata.log xymond_clie<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4140 4131 1 17:02:41 ? 0:21 xymonnet --report --ping --checkresponse --timeout=10 --dns-timeout=2 --dnslog=<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4141 4131 0 17:02:41 ? 0:00 /bin/sh /export/xymon/server/ext/xymonnet-again.sh<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4137 4131 0 17:02:41 ? 0:00 xymond_channel --channel=data --log=/var/log/xymon/rrd-data.log xymond_rrd --rr<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4144 4131 0 17:02:41 ? 0:00 xymond_channel --channel=data --log=/var/log/xymon/data.log xymond_filestore --<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4131 1 0 17:02:36 ? 0:00 /export/xymon-4.3.3/server/bin/xymonlaunch --config=/export/xymon-4.3.3/server/<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4136 4131 0 17:02:41 ? 0:00 xymond_channel --channel=status --log=/var/log/xymon/rrd-status.log xymond_rrd<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4133 4131 0 17:02:41 ? 0:00 xymond_channel --channel=stachg --log=/var/log/xymon/history.log xymond_history<o:p></o:p></p>
<p class="MsoNormal"> hobbit 12912 12885 0 10:54:09 pts/7 0:00 -bash<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4143 4131 0 17:02:41 ? 0:00 /bin/sh /export/xymon-4.3.3/client/bin/xymonclient.sh<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4289 4288 0 17:03:01 ? 0:00 /usr/bin/perl -w /usr/local/devmon/devmon<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4139 4131 1 17:02:41 ? 0:21 xymongen --recentgifs --subpagecolumns=2 --ignorecolumns=files --tooltips=never<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4134 4131 0 17:02:41 ? 0:00 xymond_channel --channel=page --log=/var/log/xymon/alert.log xymond_alert --che<o:p></o:p></p>
<p class="MsoNormal"> hobbit 4138 4131 0 17:02:41 ? 0:00 xymond_channel --channel=clichg --log=/var/log/xymon/hostdata.log xymond_hostda<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The only other clue I’ve been able to find is this note in the xymonlaunch.log file:<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> 15:29:24 pwsu020:/var/log/xymon> tail -50f xymonlaunch.log<o:p></o:p></p>
<p class="MsoNormal"> ...<o:p></o:p></p>
<p class="MsoNormal"> 2016-11-17 13:54:36 xymonlaunch starting<o:p></o:p></p>
<p class="MsoNormal"> 2016-11-17 13:54:36 Loading tasklist configuration from /export/xymon-4.3.3/server/etc/tasks.cfg<o:p></o:p></p>
<p class="MsoNormal"> 2016-11-17 13:54:36 Loading hostnames<o:p></o:p></p>
<p class="MsoNormal"> 2016-11-17 13:54:41 xgetenv: Cannot find value for variable HOME<o:p></o:p></p>
<p class="MsoNormal"> 2016-11-17 13:57:44 xgetenv: Cannot find value for variable HOME<o:p></o:p></p>
<p class="MsoNormal"> 2016-11-17 14:00:46 xgetenv: Cannot find value for variable HOME<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"> <o:p></o:p></p>
<p class="MsoNormal"> Yet, when I tried this, as well as grep’ing through xymonlaunch “truss” output for HOME, I see valid home directory values:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"> <o:p></o:p></p>
<p class="MsoNormal"> 13:58:35 pwsu020:~> echo 'echo HOME=$HOME XYMSRV=$XYMSRV XYMSERVERS=$XYMSERVERS XYMONDPORT=$XYMONDPORT' | /home/hobbit/xymon/client/bin/xymoncmd<o:p></o:p></p>
<p class="MsoNormal"> 2016-11-17 13:58:38 Using default environment file /export/xymon-4.3.3/client/etc/xymonclient.cfg<o:p></o:p></p>
<p class="MsoNormal"> HOME=/home/hobbit XYMSRV=0.0.0.0 XYMSERVERS=10.235.57.11 10.235.157.56 XYMONDPORT=1984<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Help! <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">david<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman , serif","serif"">David Mills<br>
Systems Administrator</span><br>
<b><i>Northrop Grumman</i></b><span style="font-family:"Times New Roman , serif","serif""><br>
(512) 595-1238 (mobile)</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Xymon mailing list<o:p></o:p></pre>
<pre><a href="mailto:Xymon@xymon.com">Xymon@xymon.com</a><o:p></o:p></pre>
<pre><a href="http://lists.xymon.com/mailman/listinfo/xymon">http://lists.xymon.com/mailman/listinfo/xymon</a><o:p></o:p></pre>
</blockquote>
<p><o:p> </o:p></p>
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