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IDS Forum

Re: IDS 11 computer reboot problems

Posted By: Art S. Kagel (Oninit)
Date: Monday, 14 April 2008, at 1:31 p.m.

In Response To: IDS 11 computer reboot problems (DENIS DIDEROT)

DENIS DIDEROT wrote:
> Hi,
>

Hi, see below:

> I have been using Informix SE 7.24 for a long time. Now, due to the lack of
> support and the aging of the hardware, I am obliged to upgrade to a newer
> version of Informix, most probably IDS 11. However, I can't get IDS to work
> for me.
> After obtaining trial copies of IDS 11 (workgroup and express, I have not
> managed to have a stable installation of it. I can successfully install it,
> start it, install a database on it, run dbaccess, install tools such as
> Client-SDK or ISQL, with no problems. The only and rather major problem is
> when the system is stopped and started again (regular reboot or forced
> shutdown), I can't get to have the server running again. The errors I get vary
> (after issuing either oninit, onmode, oncheck or onstat) but they all point to
> some shared memory problem.
>
> Examples:
>
> 1) [root@gage ~]# onmode -ky
> shared memory not initialized for INFORMIXSERVER gage
>
> 2) oninit -i
> [root@gage ~]# oninit -i
>

I hope you are not using 'oninit -i' to restart your instance after a
shutdown or crash!!!!!!!! The '-i' options, as indicated by the dire
warning below that you replied 'y' to, will destroy your server and all
of its existing data and initialize a new completely empty server! To
restart an existing server just run 'oninit' or 'oninit -v' to see more
verbose output on the terminal during startup.

> This action will initialize IBM Informix Dynamic Server;
> any existing IBM Informix Dynamic Server databases will NOT be accessible -
> Do you wish to continue (y/n)? y
>
> Mon Apr 14 11:29:48 2008
>
> 11:29:48 Event alarms enabled. ALARMPROG = '/usr/informix/etc/alarmprogram.sh'
> 11:29:48 Booting Language <c> from module <>
> 11:29:48 Loading Module <CNULL>
> 11:29:48 Booting Language <builtin> from module <>
> 11:29:48 Loading Module <BUILTINNULL>
> 11:29:53 Dynamically allocated new virtual shared memory segment (size 8192KB)
> 11:29:53 Memory sizes:resident:11664 KB, virtual:16384 KB, no SHMTOTAL limit
> 11:29:53 Dynamically allocated new message shared memory segment (size 528KB)
> 11:29:53 Memory sizes:resident:11664 KB, virtual:16912 KB, no SHMTOTAL limit
> 11:29:53 IBM Informix Dynamic Server Version 10.00.UC6E Software Serial Number
> AAA#B000000
> 11:29:53 Cannot Open Primary Chunk '/dev/online_root', errno = 2
> oninit: Cannot open chunk '/dev/online_root'. errno = 2
> oninit: Fatal error in shared memory initialization
> 11:29:53 IBM Informix Dynamic Server Stopped.
>
> 11:29:53 Process exited with return code 127: /bin/sh /bin/sh -c
> /usr/informix/etc/alarmprogram.sh 3 11 "Cannot open Chunk:
> '/dev/online_root'." "Cannot Open Primary C
>

^^^^^^^^^^^^^^^^^^^^ this is a dead giveaway and possibly another
problem. Does the file/device '/dev/online_root' exists? Is it owned
by user informix and group informix with privs 0660? If not that's your
problem. If this is a RAW or character device, under Linux and several
other UNIX versions you have to put commands into the startup 'rc'
scripts to recreate the RAW device drivers each time the machine boots up.

Also i note that this is the default name of the root chunk in the
unmodified ONCONFIG file, onconfig.std. You can edit the onconfig file
and really should rename the file to something like
onconfig.myservername. You can then set the ONCONFIG environment
variable to point to the newly named file and edit it to contain the
actual path of the initial root disk chunk you really want to use in the
ROOTPATH parameter.

> 11:29:53 mt_shm_remove: WARNING: may not have removed all/correct segments
>

This is just a warning that there may be shared memory segments left
over that you will have to delete manually using ipcrm if the engine was
unable to remove them automatically during the failed startup. If you
run 'ipcs -m | fgrep informix' if the list is empty you are OK. If
there are segments owned by informix the simplest thing to try is to run
'onmode -ky' which should destroy them, if that still fails, you'll have
to remove each by hand with ipcrm. This rarely happens, but it does
happen, hence the warning.

> 3) [root@gage ~]# onstat -
> shared memory not initialized for INFORMIXSERVER 'gage'
>
> The bottom line, nothing works.
>

If you continue to have trouble, you can contact us at Oninit, or any of
several other reputable Informix consultancies, and we'll help you get
started for a reasonable fee (I shouldn't think this would take more
than an hour or so and likely less). Normally setting up an IDS
instance is very simple and straight forward. Akin to making brownies.
Assemble all of the components, put them together, stir, and bake. REALLY!

As to all of the postings you saw GOOGLING around, you're just having
typical newbie problems. Concentrate on any of those that you find.
Solutions to more serious problems with similar symptoms are unlikely to
be helpful.

Art S. Kagel
Oninit

> I have googled around for days now. Funny that postings of problems related to
> this "shared memory" issue abound on Google, but I have tried all proposed
> solutions and nothing worked.
> I even had to find another box, format it clean, install Redhat Enterprise
> with the latest kernel (2.6.18-53.el5) on it ( I was starting to believe that
> maybe I had an issue of a bad glibc or else) but the problem remained.
>
> I can go into the million things I have tried to fix this issue, but you
> probably don't have time for that.
> The only time that I can have the server running is when I delete the informix
> directory and reinstall IDS. That is until the next reboot.
>
> Can someone out there tell me what I need to to fix this problem and gain
> confidence in buying a version of IDS? I know it must be a simple fix.
> Sorry for the long post...
> Thanks,
> Denis
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
> See you at the IIUG Informix 2008 Conference
> The Power Conference for Informix Professionals
> April 27 - 30, 2008 Marriott Overland Park (Kansas City), Kansas
> http://www.iiug.org/conf
> Registration Now Open!!
>
>
>

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