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I have django running through WSGI like this : <VirtualHost *:80> WSGIScriptAlias / /home/ptarjan/django/django.wsgi WSGIDaemonProcess ptarjan processes=2 threads=15 display-name=%{GROUP} WSGIProcessGroup ptarjan Alias /media /home/ptarjan/django/mysite/media/ </VirtualHost> But if in python I do : def handler(request) : data = urllib2.urlopen("http://example.com/really/unresponsive/url").read() the whole apache server hangs and is unresponsive with this backtrace #0 0x00007ffe3602a570 in __read_nocancel () from /lib/libpthread.so.0 #1 0x00007ffe36251d1c in apr_file_read () from /usr/lib/libapr-1.so.0 #2 0x00007ffe364778b5 in ?? () from /usr/lib/libaprutil-1.so.0 #3 0x0000000000440ec2 in ?? () #4 0x00000000004412ae in ap_scan_script_header_err_core () #5 0x00007ffe2a2fe512 in ?? () from /usr/lib/apache2/modules/mod_wsgi.so #6 0x00007ffe2a2f9bdd in ?? () from /usr/lib/apache2/modules/mod_wsgi.so #7 0x000000000043b623 in ap_run_handler () #8 0x000000000043eb4f in ap_invoke_handler () #9 0x000000000044bbd8 in ap_process_request () #10 0x0000000000448cd8 in ?? () #11 0x0000000000442a13 in ap_run_process_connection () #12 0x000000000045017d in ?? () #13 0x00000000004504d4 in ?? () #14 0x00000000004510f6 in ap_mpm_run () #15 0x0000000000428425 in main () on Debian Apache 2.2.11-7. Similarly, can we be protected against : def handler(request) : while (1) : pass In PHP, I would set time and memory limits.

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