Re: Lifebeat
Re: Lifebeat
- Subject: Re: Lifebeat
- From: Valerio Luccio <email@hidden>
- Date: Tue, 04 Mar 2008 16:18:21 -0500
Chuck Hill wrote:
Are you running with concurrent request handling turned off? Which
version of WO?
Chuck
WO 5.3.3. This is a Tiger machine, going to migrate to a Leopard and WO
5.4 in a few weeks.
As for concurrent request handling ... you're testing the limit of my
knowledge, how do I control that ?
Miguel Arroz wrote:
Hi!
You are trying to solve the problem in the wrong way. If you have a
long operation, you should do it on a separate thread, and use
WOLongResponse or the Ajax similar to handle the user interface. That
way, you won't have any problem with lifebeat.
Of course you're right Miguel, but this is an exceptional case, that
operation usually takes between 1 and 4 seconds and I didn't think it
was worth separate threads. I don't feel like making the changes for
something that has happened once in 3 years. If it happens more often
I'll have to do some re-design.
Chuck Hill wrote:
Hold on there, Valerio said:
That is wotaskd killing an unresponsive app, IIRC. The adaptor
timeouts should not affect this. I thought that the lifebeat came
through on a different request handler, but if it gets blocked by
having concurrent request handling off, that could explain this.
Valerio: WOLifebeatInterval controls how often the app is checked, not
how long wotaskd waits for a response.
I think we need more information: which version of WO, is concurrent
request handling on or off, what do you see in the app log when it
shuts down? Is the app running out of memory?
Chuck
OK, the WO version is above. I was under the impression that the
WOLifeBeatInterval was supposed to control how long to wait between
checks. The message in the log is:
Exception while sending response: java.net.SocketException: Broken pipe
The program would shut down after exactly 30 seconds .... of course
today the operation is taking only 3 seconds so I cannot duplicate the
error. In case you're wondering about the disparity in response time,
the database is on a server that, over the years, has taken on more and
more tasks. I've already ordered another server to offload all the file
serving operations, but for the moment this baby had to endure and
yesterday it was very busy.
--
Valerio Luccio (212) 998-8736
Center for Brain Imaging 4 Washington Place, Room 156
New York University New York, NY 10003
"In an open world, who needs windows or gates?"
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| References: | |
| | >Lifebeat (From: Valerio Luccio <email@hidden>) |
| | >Re: Lifebeat (From: Miguel Arroz <email@hidden>) |