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POZend / Apache2: Getting 302 Found when requesting url several times
 

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  1. POZend / Apache2: Getting 302 Found when requesting url several times
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    <p>I am programming a <strong>REST API</strong> with <strong>Zend framework</strong>.<br> When calling the url several times (e.g. 1000 times with 1 request per second), in about <strong>0.2 %</strong> of the cases instead of getting <strong><code>200 OK</code></strong> as a response I get <strong><code>302 Found</code></strong> - so a redirect to a different page.<br> Here is the entire server response:</p> <pre><code>302 Found Date: Mon, 04 Mar 2013 11:56:04 GMT Server: Apache/2.2.17 (Ubuntu) X-Powered-By: PHP/5.3.5-1ubuntu7.11 Set-Cookie: PHPSESSID=ui9r8jqa63dbom8osknso6eea5; path=/ Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Location: /de/default/index/index/error/500 Vary: Accept-Encoding Content-Length: 0 Content-Type: text/html; charset=utf-8 </code></pre> <p>So Zend redirects to the <strong>error 500</strong> (internal server error) page. The question is <strong>why</strong> - and I just can't figure it out...<br> The php page that is called inserts <strong>one row into a MySQL database</strong> and returns a JSON string - that's all.</p> <p><strong>Apache2</strong> has about <strong>20 concurrent connections</strong> open and the server load is &lt;&lt;1 so I really do not understand why the requests cause problems.</p> <p><strong>I know this is a really difficult problem to remote diagnose, but good guesses and recommendations how to solve this are more than welcome! Thanks.</strong></p> <p>This is the apache vhost config as requested by @chris:</p> <pre><code>&lt;IfModule mod_ssl.c&gt; &lt;VirtualHost mydomain.tld:443&gt; ServerAdmin webmaster@localhost DocumentRoot /var/www ServerName www.mydomain.tld ServerAlias mydomain.tld *.mydomain.tld &lt;Directory /&gt; Options FollowSymLinks AllowOverride All &lt;/Directory&gt; &lt;Directory /var/www/&gt; Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all &lt;/Directory&gt; ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ &lt;Directory "/usr/lib/cgi-bin"&gt; AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all &lt;/Directory&gt; ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/ssl_access.log combined # RewriteLog "/var/log/htaccess.log" # RewriteLogLevel 5 Alias /doc/ "/usr/share/doc/" &lt;Directory "/usr/share/doc/"&gt; Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 &lt;/Directory&gt; # SSL Engine Switch: # Enable/Disable SSL for this virtual host. SSLEngine on SSLOptions +StrictRequire SSLCertificateFile /etc/apache2/ssl/cert_2013_2014.crt SSLCertificateKeyFile /etc/apache2/ssl/www.mydomain.tld.key SSLCACertificateFile /etc/apache2/ssl/intermediate.crt &lt;/VirtualHost&gt; &lt;/IfModule&gt; </code></pre>
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    1. COWhat URL are you hitting to test this? Does your API do any redirects normally?
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    2. CONo redirects are usually done. The response is usually `200 OK`. The error occurs even though the script that is calling the url stays exactly the same.
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    3. COWhat's the text after the last header line (Content-Type: ...) ? The response body ? It is a strange syntax... not json, not a php dump... Else, having X-Powered-By: PHP indicates the redirection comes from php (not from apache).
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