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doc/user/trouble.htm
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<html>
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<head>
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<title>SICS Trouble Shooting</title>
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</head>
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<body>
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<h1>SICS Trouble Shooting </h1>
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<hr size=4 width="66%">
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<p>
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There is no such thing as bug free software. There are always bugs, nasty
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behaviour etc. This document shall help to solve these problems. The usual
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symptom will be that a client cannot connect to the server or the server is
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not responding.
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</p>
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<p>
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An essential prerequisite of SICS is that the server is up
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and running. The system is configured to restart the SICServer whenever it
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fails. Only after a reboot or when the keepalive processes were killed (see
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below) the SICServer must be restarted. This is done for all instruments by
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typing:
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<pre>
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startsics
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</pre>
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at the command prompt. startsics actually starts two programs: one is
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the replicator application which is responsible for the automatic
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copying of data files to the laboratory server. The other is the SICS
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server. Both programs are started by means of a shell script called
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<b>keepalive</b>. keepalive is basically an endless loop which calls
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the program again and agaian and thus ensures that the program will
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never stop running.
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</p>
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<p>
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When the SICS server hangs, or you want to enforce an reinitialization of
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everything the server process must be killed. This can be accomplished either manually or through a shell script.
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</p>
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<h2>Stopping SICS</h2>
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<p>
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All SICS processes can be stopped through the command:
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<pre>
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killsics
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</pre>
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given at the unix command line. You must be the instrument user
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(for example DMC) on the instrument computer for this to work properly.
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</p>
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<h2>Finding the SICS server</h2>
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<p>The first thing when killing the SICS server manually is to find the
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server process.
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Log in as Instrument user on the instrument computer (for instance DMC on
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lnsa05). Type the command:
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<pre>
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/home/DMC> ps -A
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</pre>
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Note the capital A given as parameter. The reward will be listing like this:
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<pre width =132>
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PID TTY S TIME CMD
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0 ?? R 01:56:28 [kernel idle]
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1 ?? I 1:24.44 /sbin/init -a
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3 ?? IW 0:00.20 /sbin/kloadsrv
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24 ?? S 40:39.58 /sbin/update
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97 ?? S 0:04.87 /usr/sbin/syslogd
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99 ?? IW 0:00.03 /usr/sbin/binlogd
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159 ?? S 1:43.70 /usr/sbin/routed -q
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285 ?? S 1:00.45 /usr/sbin/portmap
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293 ?? S 6:03.45 /usr/sbin/ypserv
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299 ?? I 0:00.37 /usr/sbin/ypbind -s -S psunix,lnsa05.psi.ch
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307 ?? I 0:00.52 /usr/sbin/mountd -i
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309 ?? I 0:00.07 /usr/sbin/nfsd -t8 -u8
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311 ?? I 0:00.09 /usr/sbin/nfsiod 7
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317 ?? S 5:51.54 /usr/sbin/automount -f /etc/auto.master -M /psi
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370 ?? I 0:28.58 -accepting connections (sendmail)
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389 ?? S 1:41.15 /usr/sbin/xntpd -g -c /etc/ntp.conf
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419 ?? S 6:00.16 /usr/sbin/snmpd
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422 ?? S 1:00.91 /usr/sbin/os_mibs
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438 ?? S 34:29.67 /usr/sbin/advfsd
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449 ?? I 3:16.29 /usr/sbin/inetd
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482 ?? IW 0:11.53 /usr/sbin/cron
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510 ?? IW 0:00.02 /usr/lbin/lpd
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525 ?? I 5:31.67 /usr/opt/psw/psw_agent -x/dev/null -f/usr/opt/psw/psw_agent.conf
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532 ?? I 0:00.74 /usr/opt/psw/psw_sensor_syswd 1 -x/dev/null
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555 ?? I 0:00.58 /usr/bin/nsrexecd
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571 ?? I 0:20.27 /usr/dt/bin/dtlogin -daemon
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583 ?? S 1:38.27 lpsbootd -F /etc/lpsodb -l 0 -x 1
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585 ?? IW 0:00.04 /usr/sbin/getty /dev/lat/620 console vt100
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586 ?? IW 0:00.03 /usr/sbin/getty /dev/lat/621 console vt100
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587 ?? I 35:59.85 /usr/bin/X11/X :0 -auth /var/dt/authdir/authfiles/A:0-aaarBa
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657 ?? I 0:01.46 rpc.ttdbserverd
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4705 ?? IW 0:00.05 dtlogin -daemon
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9127 ?? I 0:00.37 /usr/bin/X11/dxconsole -geometry 480x150-0-0 -daemon -nobuttons -verbose -notify -exitOnFail -nostdin -bg gray
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9317 ?? IW 0:00.73 dtgreet -display :0
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14412 ?? S 0:39.71 netscape
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15524 ?? I 0:00.57 rpc.cmsd
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21678 ?? S 0:00.11 telnetd
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31912 ?? S 0:10.65 /home/DMC/bin/SICServer /home/DMC/bin/dmc.tcl
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584 console IW + 0:00.21 /usr/sbin/getty console console vt100
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21978 ttyp1 S 0:00.63 -tcsh (tcsh)
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22269 ttyp1 R + 0:00.10 ps -A
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</pre>
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This is a listing of all running processes on the machine where this command
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has been typed. Note, in this case, at the bottom in the line starting with
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<tt> 31912 ?? </tt> an entry for the SICS server. In this example the server
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is running. If the server is down, no such entry would be present.
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</p>
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<h2> Killing a hanging SICS server </h2>
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<p>
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Suppose, the situation is that the SICS server does not respond anymore. It
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needs to be forcefully exited. Please note, that it is always better to
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close the server via the <tt>Sics_Exitus</tt> command typed with manager
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privilege in one of the command clients. In order to kill the server it is
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needed to find him first using the scheme given above. The information
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needed is the number given as first item in the same line where the server
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is listed. In this case: <tt>31912</tt>. Please note, that this number will
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always be different. The command to force the server to stop is:
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<pre>
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/home/DMC> kill -9 31912
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</pre>
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Note, the second parameter is the number found with <tt>ps -A</tt>. The
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SICServer will be restarted automatically by the system. Occasionally, it
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may happen, that you cannot connect to the SICS server after such an
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operation. This is due to some network buffering problems. Doing the killing
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again usually solves the problem.
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</p>
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<h2> Shutting The SICS Server Down Completely</h2>
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<p>
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This is done for you by the killsics shell script. Just type
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<pre>
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killsics
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</pre>
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at the unix command line. Here is what killsics does for you:
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In order to completely shutdown the SICS server two process must be killed:
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the actual SICS server and the process which automatically restarts the
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SICServer. The latter must be killed first. It can be found in the ps -A
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listing as a line reading <b>keepalive SICServer </b>. Kill that one as
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described above, then kill the SICServer. For restarting SICS after this,
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use the startsics command.
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</p>
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<h2>Restart Everything</h2>
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<p>
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If nothing seems to work any more, no connections can be obtained etc, then
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the next guess is to restart everything. This is especially necessary if
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mechanics or electronics people were closer to the instrument then 400 meters.
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<OL>
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<LI> Reboot the Macintosh PC by switching it off at the silver button on the
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left. Press deep and a few seconds to achieve an effect. The LED right to the
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button should be off, before you press again to boot the Macintosh.
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<LI> Reboot the histogram memory. It has a tiny button labelled RST. That' s
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the one. Can be operated with a hairpin, a ball point pen or the like.
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<LI> Wait 5 minutes. The Macintosh may take that time to come up again.
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<LI> Restart the SICServer. Watch for any messages about things not being
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connected or configured.
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<LI> Restart and reconnect the client programs.
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</OL>
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If this fails (even after a second) time there may be a network problem which
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can not be resolved by simple means.
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</p>
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<h2>Getting New SICS Software</h2>
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<p>
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Sometimes you might want to be sure that you have the latest SICS software.
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This is how to get it:
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<ol>
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<li>Login to the instrument account.
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<li>If you are no there type cd to get into the home directory.
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<li>Type <b>killsics</b> at the unix prompt in order to stop the SICS server.
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<li>Type <b>sicsinstall exe</b> at the unix prompt for copying new
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SICS software from the general distribution area.
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<li>Type <b> startsics</b> to restart the SICS software.
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</ol>
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</p>
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<h2>Hot Fixes</h2>
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<p>
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When there is trouble with SICS you may be asked by one of the SICS
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programmers to copy the most recent development reason of the SICS server
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to your machine. This is done as follows:
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<ol>
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<li>Login to the instrument account.
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<li>cd into the bin directory, for example: /home/DMC/bin.
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<li>Type <b> killsics</b> at the unix prompt in order to stop the SICS server.
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<li>Type <b>cp /data/koenneck/src/sics/SICServer .</b> at the unix prompt.
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<li>Type <b> startsics</b> to restart the SICS software.
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</ol>
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<b>!!!!!! WARNING !!!!!!!. Do this only when advised to do so by a competent
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SICS programmer. Otherwise you might be copying a SICS server in an
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instable experimental state!</b>
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</p>
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<h2> HELP debugging!!!!</h2>
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<p>
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The SICS server hanging or crashing should not happen. In order to sort such
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problems out it is very helpful if any available debugging information is
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saved and presented to the programmers. Information available are the log
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files as written continously by the SICS server and posssible core files
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lying around. They have just this name: core. In order to save them create a
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new directory (for example dump2077) and copy the stuff in there. This looks
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like:
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<pre>
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/home/DMC> mkdir dump2077
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/home/DMC> cp log/*.log dump2077
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/home/DMC> cp core dump2077
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</pre>
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The <tt>/home/DMC> </tt> is just the command prompt. Please note, that core
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files are only available after crashes of the server. These few commands
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will help to analyse the cause of the problem and to eventually resolve it.
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</p>
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</body>
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||||
</html>
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