[THIN] Re: Tough One--Nfuse sites stop responding during mid-afte rnoon

  • From: george.wasgatt@xxxxxxxxxxxx
  • To: thin@xxxxxxxxxxxxx
  • Date: Tue, 12 Nov 2002 08:34:29 -0500


Instead of bouncing the Primary Data Collector why not just stop and restart
the XML service ?

-----Original Message-----
From: Andrew Feringa [mailto:Andrew.Feringa@xxxxxxxxxxx]
Sent: Monday, November 11, 2002 10:11 PM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: Tough One--Nfuse sites stop responding during
mid-afte rnoon



How many web Citrix servers do you have? One of them maybe hung and =
will not
accept connections.

I have had a similar issue but not with Nfuse. At roughly the same time =
each
day the farm would stop accepting connections. What it ended up being =
was a
corrupt server with 18 connections on it. The server would not allow =
anyone
to log onto it but was only a problem when all the other servers =
reached 18
users and load balancing tried to connect new users to that server.

We have 100 MF servers so it was hard to detect. I found it by doing a
Qserver in the morning to see if any stats on a server stood out.

This does not explain why a reboot of the DC temporary resolves the =
issue
though?

Andrew Feringa
System Administrator
CCEA (XP), MCP
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-----Original Message-----
From: Mason Dively [mailto:mdively@xxxxxxxx]=20
Sent: Thursday, 7 November 2002 23:59
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Tough One--Nfuse sites stop responding during =
mid-afternoon


Thought I would put this one out there and see if anyone has any =
ideas?we
are near the end of our rope with this one and Citrix support has been =
next
to worthless up to this point. =20

=20

Farm:

Win2K SP2 Active Directory Domain

Metaframe XPe FR1/SP2

3 Zones (2 production zones with 60 application servers per zone, and 1
testing/training zone with 30 application servers) (Each of the 3 zones =
has
its own dedicated data collector)

2 Load balanced Nfuse 1.6 web servers pointed to the primary data =
collector
for zone 1 for their published application information

=20

Situation:

Our farm has been online for nearly a year and a half now and we have =
been
using the Nfuse implementation for just over a year.  We started with =
Nfuse
1.51 when we originally built our farm, and used the Custom Web Site =
builder
that shipped with Nfuse 1.51 to build multiple sites on our Nfuse =
servers.
These websites that we created with the website builder have worked
perfectly fine since they were first created over a year ago.  Just =
within
the past two days, each day around 2:30 in the afternoon (peak logon =
time
for our farm?after lunch rush), we have experienced the following =
problem.
We suddenly see the number of current web connections jump dramatically =
up
on both of our web servers (this might be something network =
related?haven?t
pinpointed the cause here) and then both of the websites stop =
responding.
What I mean by stop responding is that when a user points their web =
browser
to the login page, the initial login page will load but then the window =
that
pops up to che
 ck whether the ICA client is installed on the local machine just sits =
there
and hangs.  The ICA client popup window never closes as it normally =
does
when the website is working properly.  If you try to close the ICA =
client
popup window and then login to the website?it just basically sits there =
and
spins?doesn?t ever bring up an application set.  The first thing we =
tried is
restarting IIS, but this did not change the outcome.  After this we =
tried
rebooting our webservers (one at a time) and then trying to load the =
initial
login page?even with a very small amount of web connections to the web
servers the page still does not function properly.  Our next step was =
to
bounce our primary data collector?the box that both of our webservers =
are
pointed to for their published application information.  Once the =
primary
data collector is rebooted and comes back up, the problem seems to go =
away.
This is where we are stuck.  Why does rebooting the data collector fix =
the
web servers abilit
 y to display the Nfuse websites?  It is very odd that the web ICA =
client
window would just stick there and not allow us to login to the page, =
but as
soon as we reboot the data collector the site starts functioning =
correctly.
This puppy is nasty and we obviously don?t want to deal with rebooting =
our
data collector every day in the middle of peak login time.

=20

Does anyone have any ideas as to what might be causing this problem?  =
Any
help is greatly appreciated?I?m buying beers for anyone who has the fix =
for
this one!!!

=20

By the way?don?t ever let your farm dump on you during IForum?there are =
no
Citrix SE?s available right now!!

=20

Thanks,

=20

Mason B. Dively  MCP,CCA

Amdocs CMI Production Windows Support

=20

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