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I have the following situation:

A site hosted in apache 2.4, with ssl, that works like a charm for a while now, but out of no where, without modifications to the site, apache started serving random blank pages.

The workaround this is to delete the cookies of the browser or restart the browser.

I've switched the vitualhost to log in debug mode but it didn't got me anywhere.

Here is the debug log of a failed page load:

[Wed Oct 24 10:57:35.762547 2012] [ssl:info] [pid 27854:tid 140617706374912] [client] AH01964: Connection to child 147 established (server
[Wed Oct 24 10:57:35.762739 2012] [ssl:debug] [pid 27854:tid 140617706374912] ssl_engine_kernel.c(1966): [client] AH02043: SSL virtual host for servername found
[Wed Oct 24 10:57:35.777479 2012] [ssl:debug] [pid 27854:tid 140617706374912] ssl_engine_kernel.c(1899): [client] AH02041: Protocol: TLSv1, Cipher: DHE-RSA-AES256-SHA (256/256 bits)
[Wed Oct 24 10:57:35.779912 2012] [ssl:debug] [pid 27854:tid 140617706374912] ssl_engine_kernel.c(243): [client] AH02034: Initial (No.1) HTTPS request received for child 147 (server
[Wed Oct 24 10:57:35.780044 2012] [authz_core:debug] [pid 27854:tid 140617706374912] mod_authz_core.c(809): [client] AH01628: authorization result: granted (no directives)
[Wed Oct 24 10:57:40.783950 2012] [ssl:info] [pid 27854:tid 140617706374912] (70007)The timeout specified has expired: [client] AH01991: SSL input filter read failed.
[Wed Oct 24 10:57:40.784077 2012] [ssl:debug] [pid 27854:tid 140617706374912] ssl_engine_io.c(988): [remote] AH02001: Connection closed to child 147 with standard shutdown (server
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It's your application. – Michael Hampton Oct 24 '12 at 19:52
at first i thought it were the application, but it hasn't changed over the last 30 days and this situation started this week. Anyway i'll take a harder look into de application. – Bruno Araujo Oct 25 '12 at 11:33

If the problem is solved by deleting cookies the problem is most likely not related to Apache in it self.

I'd rather go and troubleshoot the website that you're serving.

However, even if Apache's not "responsible" for the fault, it can be a good idea to have a look in the error-logs of Apache anyway.

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