Two things are going amiss with Apache here.

1. Apache is intermittently issuing a 403 "Directory index forbidden by Options directive" but it never should. For example the two
below links work fine. But look at the log entry showing the 403 error. Crazy. I cannot duplicate the error at all (except see #2
issue below). I just see it in the logs.



Here's error log:
[Fri Jun 01 11:05:06 2012] [error] [client] Directory index forbidden by Options directive:

2. After grepping through the access logs and finding 403's, I can go to those pages and get the 403 again (if I use the same
browser as the original requestor) because mod_cache is cacheing the 403! Here's two entries in the log file showing the 403
getting served (my local IP address removed) at 11:33:09. Then I force refresh the page (by making my browser send in a "no-cache"
in my HTTP request) then the page comes back just fine there at 11:33:18. I cannot get the 403 to ever come back again. As long as
I don't send the "Cache-Control: no-cache" I can keep getting served the 403 out of the cache.

Here's the log file:
[01/Jun/2012:11:33:09 -0700] GET /tools/calculate/file-size/result/?size=32&unit=kilobytes HTTP/1.1 403 302 -
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0 -
[01/Jun/2012:11:33:18 -0700] GET /tools/calculate/file-size/result/?size=32&unit=kilobytes HTTP/1.1 200 3347 -
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0

So my questions are: Why is the 403 happening at all? And more importantly, why is mod_cache serving the 403?????!!!!!!!!!!!!



PS. I suppose I'll open a bug report but wanted to post here first in case I was missing something basic.

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  • Geoff Millikan at Jun 3, 2012 at 4:12 am
    Submitted bug report for Apache 2.2.22 at link below. We've turned of mod_cache on our production web servers until it's resolved
    because we can't have phantom 403 pages going out to customers. Considering jumping to 2.4.2...


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postedJun 1, '12 at 6:37p
activeJun 3, '12 at 4:12a

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Geoff Millikan: 2 posts



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