LDAP not responding

[Ilyas]

Hi,
We are using WebSphere Portal Server 5.1 with IBM Directory Server V6.0
as a users repository. Both are running over AIX 5.3. When there are
too many users trying to access WebSphere Portal, sometimes LDAP doesn't
respond. It seems like IDS process hangs(a ps -ef | grep ibmslapd shows
that the process exists, but the LDAP are not responding). We tried to
access to the LDAP with a GUI Tool, but we didn't succeeded. So the only
way we found to get back IDS working is to stop and start IDS.
Any suggestion to know what happen each time IDS is not responding? And
how could I diagnostic the problem?
Regards,
ILYAS

[sujay]

Hi Ilyas,

In case where the Directory Server appears to be hang try to run a
monitor search ...
if you get a error something like "cant contact directory server"
please check the following ...

The ulimit settings on the system might not allow the Directory Server
to accept connections beyond the default settings.

To see the current settings please run ulimit -a command
Sample output of the command ..
bash-2.05a# ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
max memory size (kbytes, -m) 32768
open files (-n) 256
pipe size (512 bytes, -p) 64
stack size (kbytes, -s) 32768
cpu time (seconds, -t) unlimited
max user processes (-u) 262144
virtual memory (kbytes, -v) unlimited

notice the open files (-n) which is 256 this means that the maximum
files a process can open is 256 now a socket also has a file
descriptor so our connections will be limited upto 256.

If your open files ulimit -n is too small and you have the required
system access you might want to change the ulimit -n settings ...
One can change the ulimit settings as ... ulimit -n 1024

Thanks,
Sujay.

[Christian Chateauvieux]

What level of fixpack have you applied to TDS?

-- C

[Ilyas]

Christian Chateauvieux a écrit :

Hi,
No fixes have been applied yet... Is it really important to apply fixes
to TDS?

[jmc...@us.ibm.com]

If you are having a problem, I would certainly recommend that you at least
see what the current fix level is and scan through the list of problems
fixed. You may find your problem -- or other problems that could be of
interest to you.

You can find the ITDS support site here, including links to download the
current fixpack level:
http://www-306.ibm.com/software/sysmgmt/products/support/IBMDirectoryServer.html

John