Greetings everyone, I've been having a very frustrating problem over the past few months that I've ***finally*** tracked down the "cause" of....
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Any questions/comments/thoughts/ideas you can provide would be *greatly* appreciated. Symptoms: - IE, Opera, Lynx all report "page cannot be displayed" and/or "server error" about "half the time".... - NS has no problems at all. - Apache error.log shows child (PID) seg faulted. Problem post analysis: - The Apache processes can accept and successfully serve one connection from a client. The next connection results in the Apache child process seg faulting, the error getting logged in error.log, nothing gets reported in access.log, and the Apache parent process respawns a new child. - The newly spawned child will accept and serve one connection from a client before also segfaulting. I've eliminated every possibility I could think of while troubleshooting this. i.e. it's not SSL, it's not PHP itself, it's not Apache itself. It's the pg_pconnect() function. Throughout my troubleshooting, I came upon it by accident, really, that I discovered all my problems went away when I replaced the pg_pconnect() function with the (almost deprecated according to the docs) pg_connect() function. In troubleshooting this, I created a shell script that continuously loads various pages from the site (using Lynx -dump -mime_header <url>), counts the iterations, and bails as soon as a page fails to load. Running this against plain HTML files, PHP scripts (i.e. that simply echo something or provide phpinfo(), etc.), over SSL or not all work just fine. (>15,000 loads in each case without fault.) As soon as I try accessing a PHP script that includes the pg_pconnect() function, it dies almost immediately. If I stop/start Apache right before trying this, I'll get X successful loads (where X = Apache's 'StartServers' property). After that, I'll get a continuous mixture of successful and failed loads from then on.... So, let me repeat here.... As soon as I switched from pg_pconnect() to pg_connect(), everything worked perfectly after that. (i.e. >15000 loads without an error.) More info: - My platform is up-to-date Debian GNU/Linux (sid) (Apache 1.3.23, PHP 4.1.1, PostgreSQL 7.1.3, etc.) - As above, this is *not* browser specific. (Found a *lot* of google hits with people having problems with IE and SSL and seg faults, etc. Completely unrelated.) - Note from above, though, that NS is unaffected by this problem. It *never* has a problem. My assumption is that NS will simply silently retry (several times) if the connection fails for some reason, until it does get a valid response from the server.... (Kudos!!! ;-) So, any thoughts? Comments? Suggestions? Have I found a bug in pg_pconnect()? How can I provide more info to track this down further? Best regards, Kevin Traas Chief Information Officer, Co-founder Merilus, Inc. ---=== www.merilus.com ===--- -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
