Re: [PHP4BETA] Re: yet another Session oddness/bug?

Hi Peter, I have included my test app. Its pretty straight forward. To compile it just do gcc -o test test.c -lpthread That should work on a linux box. I'm still trying to track down where my session problems are coming from. This test app assumes that you have a php script which outputs COUNT=<val>; The app looks for COUNT=<val here>; to find the value of the session variable. In this case it should increase by 1 each time through the loop for each thread that is hitting it. I just ran a test last night using 3 different machines to simultaneously hit the web server. Each run was 100 threads running 20000 iterations, and about 10% of the threads failed to get the final result of 20,000 for the session variable. It looks like it may have a hard time starting a lot of sessions at the same time, but I do have 64 apache processes running on the web server. so I have a test page which is <? session_start(); ?> <html> <? if (!isset($count)) { session_register("count"); $count = 1; echo "\nNEW SESSION\n"; } else $count++; ?> COUNT=<? echo $count; ?>;<br> </html> Peter Kovacs wrote: > Could I take a look at your test app? I'm using mysql to store sessions > (I can share the definitions with you if you like, as I got them off the > list). I haven't tested the database sessions under a heavy load yet. > > Thanks, > Peter > > On Tue, 28 Mar 2000, waltb wrote: > > > Howdy again, > > I've been doing even more testing with this and sessions just seems to be > > > > very flaky to me under a decent load. > > > > Here is another output where I had the value of my session variable > > got blown away. It was working just fine for 29 requests, and then > > all of a suddon the value got nuked and changed. Here is the output > > of the test. During test 30 (RESPONSE(30), you can see that > > the $count variable got changed from 29 to 2. There are no other > > threads using this session id. I can give out my test app freely if > > anyone wants to look at it. It's pretty straight forward. > > > > ... > > RESPONSE(28) > > HTTP/1.1 200 OK^M > > Date: Wed, 29 Mar 2000 20:39:40 GMT^M > > Server: Apache/1.3.12 Ben-SSL/1.39 (Unix) PHP/4.0b5-dev^M > > Set-Cookie: Apache=10.1.0.69.14067954362380798; path=/^M > > X-Powered-By: PHP/4.0b5-dev^M > > Expires: Thu, 19 Nov 1981 08:52:00 GMT^M > > Cache-Control: no-cache^M > > Pragma: no-cache^M > > Connection: close^M > > Content-Type: text/html; charset=iso-8859-1^M > > ^M > > <html> > > COUNT=28;<br> > > </html> > > > > REQUEST(29) GET /rc/php/test/test_session.php HTTP/1.0 > > User-Agent: Mozilla/4.61 [en] (X11; U; Linux 2.2.12-20 i686) > > Host: 10.1.0.80 > > Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png > > Accept-Encoding: gzip > > Accept-Language: en > > Accept-Charset: iso-8859-1,*,utf-8 > > Cookie: PHPSESSID=e202710a7f3217f80f74aa5a21602c85 > > > > > > RESPONSE(29) > > HTTP/1.1 200 OK^M > > Date: Wed, 29 Mar 2000 20:39:40 GMT^M > > Server: Apache/1.3.12 Ben-SSL/1.39 (Unix) PHP/4.0b5-dev^M > > Set-Cookie: Apache=10.1.0.69.14092954362380804; path=/^M > > X-Powered-By: PHP/4.0b5-dev^M > > Expires: Thu, 19 Nov 1981 08:52:00 GMT^M > > Cache-Control: no-cache^M > > Pragma: no-cache^M > > Connection: close^M > > Content-Type: text/html; charset=iso-8859-1^M > > ^M > > <html> > > COUNT=29;<br> > > </html> > > > > REQUEST(30) GET /rc/php/test/test_session.php HTTP/1.0 > > User-Agent: Mozilla/4.61 [en] (X11; U; Linux 2.2.12-20 i686) > > Host: 10.1.0.80 > > Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png > > Accept-Encoding: gzip > > Accept-Language: en > > Accept-Charset: iso-8859-1,*,utf-8 > > Cookie: PHPSESSID=e202710a7f3217f80f74aa5a21602c85 > > > > > > RESPONSE(30) > > HTTP/1.1 200 OK^M > > Date: Wed, 29 Mar 2000 20:39:40 GMT^M > > Server: Apache/1.3.12 Ben-SSL/1.39 (Unix) PHP/4.0b5-dev^M > > Set-Cookie: Apache=10.1.0.69.14073954362380807; path=/^M > > X-Powered-By: PHP/4.0b5-dev^M > > Expires: Thu, 19 Nov 1981 08:52:00 GMT^M > > Cache-Control: no-cache^M > > Pragma: no-cache^M > > Connection: close^M > > Content-Type: text/html; charset=iso-8859-1^M > > ^M > > <html> > > COUNT=2;<br> > > </html> > > > > > > > > > > > > > > > Howdy folks, > > > I'm working on writing a C test application to test the robustness of > > > sessions. > > > I basically need to validate to myself that I can use this on a very > > > high traffic site. > > > So I wrote a simple multithreaded app that just makes simple http > > > GET requests > > > for a small php page that I wrote. The only thing that this app does is > > > spawn off > > > n number of threads to make x number of back to back requests of the > > > same url. > > > It parses out the PHPSESSID cookie from the response header the first > > > time it > > > sees it, to use in subsiquent GET requests to maintain the session. > > > Below is my simple php page which gets called over and over for each > > > thread. > > > <? > > > session_start(); > > > ?> > > > <html> > > > <? > > > if (!isset($count)) > > > { > > > session_register("count"); > > > $count = 1; > > > echo "\nNEW SESSION\n"; > > > } > > > else > > > $count++; > > > ?> > > > COUNT=<? echo $count; ?>; times.<br> > > > </html> > > > > > > My problem I'm having is that I'm seeing a session not really working > > > properly. > > > Below is the output of my app. I have the output of all of the threads > > > going to individual > > > files, so I can make sense of the output. > > > > > > As you see from the output (below), the app makes 2 requests for the > > > same file on the server. > > > The first request gets a response to set the PHPSESSID cookie and the > > > output of the > > > php script shows that the session is new and the count variable's value > > > is 1. > > > The app then makes the second request for the same file on the server > > > with the > > > PHPSESSID cookie set with the appropriate value. The problem is the > > > second > > > response. According to the second response, the session variable $count > > > wasn't > > > set, and so it re-registers the variable again and the assigns it to 1 > > > again. This seems > > > like a bug to me. > > > > > > The really odd thing is, this only happens when I run the test app on a > > > different machine > > > then the web server. If I run the test app on the same machine as the > > > test server sessions > > > seem to start and work appropriately. > > > > > > Does anyone have any ideas of what I might look at? Is this a bug? > > > Could the server > > > GET requests be malformed? > > > > > > Thanks > > > Walt > > > > > > thread 1 started > > > GET /rc/php/test/test_session.php HTTP/1.0 > > > User-Agent: Mozilla/4.61 [en] (X11; U; Linux 2.2.12-20 i686) > > > Host: 10.1.0.69 > > > Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png > > > Accept-Encoding: gzip > > > Accept-Language: en > > > Accept-Charset: iso-8859-1,*,utf-8 > > > > > > REQUEST(0) GET /rc/php/test/test_session.php HTTP/1.0 > > > User-Agent: Mozilla/4.61 [en] (X11; U; Linux 2.2.12-20 i686) > > > Host: 10.1.0.69 > > > Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png > > > Accept-Encoding: gzip > > > Accept-Language: en > > > Accept-Charset: iso-8859-1,*,utf-8 > > > > > > RESPONSE(0) > > > HTTP/1.1 200 OK^M > > > Date: Wed, 29 Mar 2000 04:28:24 GMT^M > > > Server: Apache/1.3.12 Ben-SSL/1.39 (Unix) PHP/4.0RC1^M > > > Set-Cookie: Apache=10.1.0.79.2060954304104670; path=/^M > > > X-Powered-By: PHP/4.0RC1^M > > > Set-Cookie: PHPSESSID=793e2564f9581b193f6f732a9c075aba; path=/; > > > domain=.rocketcash.com^M > > > Expires: Thu, 19 Nov 1981 08:52:00 GMT^M > > > Cache-Control: no-cache, post-check=0, pre-check=0^M > > > Pragma: no-cache^M > > > Connection: close^M > > > Content-Type: text/html; charset=iso-8859-1^M > > > ^M > > > <html> > > > > > > NEW SESSION > > > COUNT=1; times.<br> > > > </html> > > > > > > New COOKIE: PHPSESSID=793e2564f9581b193f6f732a9c075aba > > > REQUEST(1) GET /rc/php/test/test_session.php HTTP/1.0 > > > User-Agent: Mozilla/4.61 [en] (X11; U; Linux 2.2.12-20 i686) > > > Host: 10.1.0.69 > > > Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png > > > Accept-Encoding: gzip > > > Accept-Language: en > > > Accept-Charset: iso-8859-1,*,utf-8 > > > Cookie: PHPSESSID=793e2564f9581b193f6f732a9c075aba > > > > > > RESPONSE(1) > > > HTTP/1.1 200 OK^M > > > Date: Wed, 29 Mar 2000 04:28:24 GMT^M > > > Server: Apache/1.3.12 Ben-SSL/1.39 (Unix) PHP/4.0RC1^M > > > Set-Cookie: Apache=10.1.0.79.2063954304104677; path=/^M > > > X-Powered-By: PHP/4.0RC1^M > > > Expires: Thu, 19 Nov 1981 08:52:00 GMT^M > > > Cache-Control: no-cache, post-check=0, pre-check=0^M > > > Pragma: no-cache^M > > > Connection: close^M > > > Content-Type: text/html; charset=iso-8859-1^M > > > ^M > > > <html> > > > > > > NEW SESSION > > > COUNT=1; times.<br> > > > </html> > > > > > > -- > > PHP 4.0 Beta Mailing List > > <http://www.php.net/version4/> > > To unsubscribe, e-mail: php4beta-unsubscribe@lists.php.net > > For additional commands, e-mail: php4beta-help@lists.php.net > > To contact the list administrators, e-mail: php4beta-admin@lists.php.net > > > > > > -------------------------------------------------- > Peter D. Kovacs KnowPost.com LLC > Lead Engineer peter@knowpost.com > --------------------------------------------------

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