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There have been multiple reports of cases where a real locked entry was
removed, resulting in a segmentation fault later in a worker which locked
the entry. It looks like default inactive timeout isn't enough in real
life.
For now just ignore such locked entries, and move them to the top of the
inactive queue to allow processing of other entries.
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There are two possible situations which can lead to this: response was
cached with bigger proxy_buffer_size value (and nginx was restared since
then, i.e. shared memory zone content was lost), or due to the race in
the cache update code (see [1]) we've end up with fcn->body_start from
a different response stored in shared memory zone.
[1] http://mailman.nginx.org/pipermail/nginx-devel/2011-September/001287.html
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The ngx_http_cache() and ngx_http_no_cache_set_slot() functions were replaced
by ngx_http_test_predicates() and ngx_http_set_predicate_slot() in 0.8.46 and
no longer used since then.
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the "proxy_redirect" directive.
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FreeBSD kernel checks headers/trailers pointer against NULL, not
corresponding count. Passing NULL if there are no headers/trailers
helps to avoid unneeded work in kernel, as well as unexpected 0 bytes
GIO in traces.
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haven't been sent to a client.
The ngx_http_variable_headers() and ngx_http_variable_unknown_header() functions
did not ignore response header entries with zero "hash" field.
Thanks to Yichun Zhang (agentzh).
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(fixes #38).
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"access_log" directive fails.
- Added a warning if "log_format" is used in contexts other than "http".
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The function has been unused since r3326.
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The of.read_ahead wasn't set in try_files code path, causing read_ahead
directive to be a nop if try_files and open_file_cache were used.
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The "so_keepalive" directive in mail module was deprecated.
Thanks to Vsevolod Stakhov for initial work.
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Events from eventfd do not have c->write set, and the stale event
check added in r4306 causes null pointer dereference.
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Requested by Igor Sysoev.
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It was working for nginx's own 206 replies as they are seen as 200 in the
headers filter module (range filter goes later in the headers filter chain),
but not for proxied replies.
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Additional parsing logic added to correctly handle RFC 3986 compliant IPv6 and
IPvFuture characters enclosed in square brackets.
The host validation was completely rewritten. The behavior for non IP literals
was changed in a more proper and safer way:
- Host part is now delimited either by the first colon or by the end of string
if there's no colon. Previously the last colon was used as delimiter which
allowed substitution of a port number in the $host variable.
(e.g. Host: 127.0.0.1:9000:80)
- Fixed stripping of the ending dot in the Host header when the host was also
followed by a port number.
(e.g. Host: nginx.com.:80)
- Fixed upper case characters detection. Previously it was broken which led to
wasting memory and CPU.
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Patch by Zaur Abasmirzoev.
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If process exited abnormally while holding lock on some shared memory zone -
unlock it. It may be not safe thing to do (as crash with lock held may
result in corrupted shared memory structure, and other processes will
subsequently crash while trying to access shared data), therefore complain
loudly if unlock succeeds.
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It is currently used from master process on abnormal worker termination to
unlock accept mutex (unlocking of accept mutex was broken in 1.0.2). It is
expected to be used in the future to unlock other mutexes as well.
Shared mutex code was rewritten to make this possible in a safe way, i.e.
with a check if lock was actually held by the exited process. We again use
pid to lock mutex, and use separate atomic variable for a count of processes
waiting in sem_wait().
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Stale write event may happen if epoll_wait() reported both read and write
events, and processing of the read event closed descriptor.
Patch by Yichun Zhang (agentzh).
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Non-default servers may not have ssl context created if there are no
certificate defined. Make sure to check if ssl context present before
using it.
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in the sys_nerr test.
o When sys_nerr and _sys_nerr are missed on a particular platform
and our euristic for a maximum errno detection applied always
print the maximum errno number we reached instead of printing void.[*]
* patch from Maxim Dounin
This commit makes possible to build nginx on AIX 7.1.
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Patch by Alexander Usov. The bug has been introduced in r4267.
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A fix for the broken build applied.
Patch from Igor Sysoev.
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Check if received data length match Content-Length header (if present),
don't cache response if no match found. This prevents caching of corrupted
response in case of premature connection close by upstream.
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Used "\x5" in 5th byte to claim presence of both audio and video. Used
previous tag size 0 in the beginning of the flv body (bytes 10 .. 13) as
required by specification (see http://www.adobe.com/devnet/f4v.html).
Patch by Piotr Sikora.
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Previously it used a hardcoded value of 300 seconds. Also added the
"valid=" parameter to the "resolver" directive that can be used to
override the cache validity time.
Patch by Kirill A. Korinskiy with minor changes.
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