https://issues.apache.org/bugzilla/show_bug.cgi?id=47693
Summary: GET request has race condition w.r.t. replacement of
file being served
Product: Apache httpd-2
Version: 2.3-HEAD
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: All
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from [email protected] 2009-08-13 05:23:12 PDT ---
When a GET request is received by Apache, it first opens the file to determine
the length, then closes it, then reopens it to serve the file.
An interesting use case is to replace a file (using an atomic rename) and have
Apache give consistent results: always return either the old file or the new
file.
However, the current implementation will give inconsistent results when the
length of the file changes between the first and second time Apache opens the
files.
If the new file is longer, Apache returns the content of the new file truncated
to the length of the first file. If the new file is shorter, Apache returns an
error response.
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