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From: holtz@zonker.cascade.carleton.ca (Neal Holtz)
Newsgroups: comp.sys.apollo
Subject: YARR (Yet Another Registry Rot)
Message-ID: <1990Oct9.162600.16610@ccs.carleton.ca>
Date: 9 Oct 90 16:26:00 GMT
Sender: news@ccs.carleton.ca (news)
Organization: none
Lines: 98

I am sure this question has been asked (and answered) before, but I can't find
it in my archives...

Configuration:
	1 - DN4500, disked
	3 - DN3500s, disked
	4 - DN 2500s, diskless - one booted off each disked node
	SR10.2 Aegis & BSD
	1 Master registry, on DN4500, no replications
	DN4500 runs glbd, llbd, rgyd
	each DN3500 runs llbd

Problem:
	With time, the registry server becomes unavailable on the DN3500's
	and users are logged in using the local registries.  This seems
	to take the form of a gradual rot, with more of the DN3500s becoming
	'serverless'.                                                          

	Also, of course, '/etc/passwd' is unreadable (doesn't exist).

	However, the registries are still available to the diskless
	DN2500s booted off the DN3500s, and /etc/passwd is OK.

	And the DN3500 has no trouble seeing the files on and otherwise
	communicating with the rgy server node.
                     

Attempted fixes:

	We have rebooted everything, we have manually restarted various
	servers, and looked at a few log files in in /usr/adm.
	Nothing worked, and no clues, either.  Debugging via Apollos hot line
 	seems to take a long time, as well. 

	The clocks are set to within a few seconds.

Details:

Processes on the Master Registry node (DN4500):

    1 > ps -ax
      PID TTY     STAT  TIME COMMAND
        1 ?       S <   0:23 /etc/init
        2 ?       R   1461:10 null
        3 ?       S     0:51 purifier
        4 ?       S     0:29 purifier
        5 ?       S     0:50 unwired_dxm
        6 ?       S     0:00 pinger
        7 ?       S     0:04 netreceive
        8 ?       S     0:39 netpaging
        9 ?       S     0:18 wired_dxm
       10 ?       S     0:38 netrequest
       91 ?       S     5:10 /etc/tcpd
       96 ?       S     1:25 /etc/routed -f -q
       99 ?       S     0:00 /etc/inetd
      102 ?       S     0:00 /etc/ncs/llbd
      104 ?       S     1:49 /etc/ncs/glbd
      107 ?       S <   2:02 /etc/rgyd
      112 ?       S     0:04 /sys/spm/spm
      115 ?       S     0:03 /sys/net/netman
      117 ?       S     0:03 /sys/ns/ns_helper
      120 ?       S     0:08 /sys/alarm/alarm_server -disk 98 -msg -w 0 0 550 100 -
      122 ?       S     0:01 /sys/mbx/mbx_helper
      125 ?       S <   0:08 /etc/Xapollo -K /usr/X11/lib/keyboard/keyboard.config 
      127 ?       S <   8:29 dm
	

processes on the serverless DN3500:

    Connected to node 19A9D   "//thorin"
    login: 
    Password: 
    Using local registry. Can't use network registry:  - Registry server unavailable (from RGYC / Server)
    1 > ps -ax
      PID TTY     STAT  TIME COMMAND
        1 ?       S <   0:28 /etc/init
        2 ?       R   158:32 null
        3 ?       S     0:05 purifier
        4 ?       S     0:00 purifier
        5 ?       S     0:09 unwired_dxm
        6 ?       S     0:00 pinger
        7 ?       S     0:00 netreceive
        8 ?       S     0:23 netpaging
        9 ?       S     0:02 wired_dxm
       10 ?       S     0:13 netrequest
       92 ?       S     0:00 /etc/ncs/llbd
       97 ?       S     0:01 /sys/spm/spm
       99 ?       S     0:03 /sys/net/netman
      101 ?       S     0:02 /sys/alarm/alarm_server -disk 98 -msg -w 0 0 550 100 -v 20 20
      105 ?       S     0:00 /sys/mbx/mbx_helper
      107 ?       S <   0:05 /etc/Xapollo -K /usr/X11/lib/keyboard/keyboard.config -D1 s+r-
      109 ?       S <   4:09 dm


Perhaps I'll dig out my SR8 floppies and re-install :-(
--
Prof. Neal Holtz,  Dept. of Civil Eng.,  Carleton University,  Ottawa, Canada
Internet: holtz@civeng.carleton.ca   Tel: (613)788-5797    Fax: (613)788-3951