Rick,

There's one possibility that comes to mind dealing with networking.  See
this post.

http://www.coldfusionmuse.com/index.cfm/2006/5/25/hanging.threads.network.ca
pacity.2

It's a fairly rare error dealing with renegotiation of port speeds/duplexing
- but it could mimic the "sudden failure" issue you saw and it leaves these
orphaned threads. Of course other network related issues could also cause
the same thing - broadcast storms, switch recycling etc.

-Mark

Mark A. Kruger, MCSE, CFG
(402) 408-3733 ext 105
Skype: markakruger
www.cfwebtools.com
www.coldfusionmuse.com
www.necfug.com



-----Original Message-----
From: Rick Root [mailto:[email protected]] 
Sent: Sunday, November 28, 2010 2:19 PM
To: cf-talk
Subject: Diagnosing DB / CF problem


88 minutes ago, 5 different requests to various pages on the
classcreator web site died while executing SQL Statements.  There is
nothing unusual about the SQL Statements, and in each case, these
statements are executed tens or hundreds of times per minute with no
problem.

Since that time, 88 minutes ago, no additional queries have frozen any
requests, but those 5 requests are still hanging (Fusion Reactor
reports attempting to kill them, but the SQL calls are native threads
so it cannot kill them).

Since the instances were restarted approximately 107 minutes ago, the
server has processed about 60,0000 requests, and only these 5 hung,
all 5 at the same time.

Anybody have any ideas what might cause something like these?  We've
had it happen several times recently.... we're running CF8 enterprise
on Win2k8 ... (upgrading to CF9 next weekend!)

I hate that the only way to kill these threads is to restart the CF
instances...

Rick



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