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Re: SUMMARY: Curl leaving lots of Apache threads around - why?

From: Ralph Mitchell <rmitchell_at_eds.com>
Date: Fri, 02 Jul 2004 00:34:18 -0500

I'm using curl to watch some tomcat ports - they said "go get a page
from the server on the 8080 port..." so I did this:

curl ... http://server.domain.com:8080/abs/index.html

with associated scripting to grep for something relevant in the returned
page.

Seems to work just fine for me.

Ralph Mitchell

Fletcher Cocquyt wrote:

> Turns out the BigBrother port tests bbnet does were causing this behavior.
>
> Tomcat logs these when BB telnets and quits on port 7009:
>
> SEVERE: BAD packet signature 29045
>
> 71 75 69 74 00 00 00 00 00 00 00 00 00 00 00 00 | quit............
>
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
>
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
>
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
>
> I’m not sure why this caused the curl calls to accumulate Apache
> threads, but eliminating the BB check solved the issue.
>
> I’m looking at better ways to make sure tomcat is up.
>
> Thanks,
>
> Fletcher Cocquyt
>
> Senior Systems Administrator
>
> fcocquyt_at_stanford.edu
>
> -----Original Message-----
> *From:* curl-users-bounces_at_cool.haxx.se
> [mailto:curl-users-bounces_at_cool.haxx.se] *On Behalf Of *Fletcher Cocquyt
> *Sent:* Tuesday, June 29, 2004 9:52 PM
> *To:* curl-users_at_cool.haxx.se
> *Subject:* Curl leaving lots of Apache threads around - why?
>
> We employ curl (curl 7.10.4 (sparc-sun-solaris2.9) libcurl/7.10.4
> OpenSSL/0.9.7a zlib/1.1.4
>
> ) heavily to monitor our different webapps (apache 2.0.48 + tomcat 4.1.30)
>
> The command looks like:
>
> time curl -s -netrc-optional -k -m 25 –i {URL to monitor}
>
> I run the script every 5 minutes and graph the latency in cacti.
>
> The problem is, the apache threads associated with these curl calls do
> not disappear – but stick around in “sending reply” mode – as reported
> by the apache 2.0.48 extended status stats.
>
> I know the URLs are actually returning and not timing out because the
> graphs would reveal timeouts.
>
> I am puzzled why curl is exhibiting this behaviour with apache.
>
> Eventually I have to HUP the apache server to clear the threads.
>
> Thanks for any insight!
>
> Fletcher Cocquyt
>
> Senior Systems Administrator
>
> fcocquyt_at_stanford.edu
>
Received on 2004-07-02

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