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Fixed stucking cache status into UPDATING. #2162

u5h
October 01, 2023 07:00PM
# HG changeset patch
# User Yugo Horie <u5.horie@gmail.com>
# Date 1696144340 -32400
# Sun Oct 01 16:12:20 2023 +0900
# Node ID f8f6290d60615a4dfe2d8b26246891228f19aa5d
# Parent 3db945fda515014d220151046d02f3960bcfca0a
Fixed stucking cache status into UPDATING.

Fixed issue-2162's stucking cache status to
introduce `last_updating_time` to record at
the time to start the item last update.
https://trac.nginx.org/nginx/ticket/2162#comment:6

diff -r 3db945fda515 -r f8f6290d6061
src/http/modules/ngx_http_proxy_module.c
--- a/src/http/modules/ngx_http_proxy_module.c Fri Sep 22 19:23:57 2023
+0400
+++ b/src/http/modules/ngx_http_proxy_module.c Sun Oct 01 16:12:20 2023
+0900
@@ -564,6 +564,13 @@
offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_use_stale),
&ngx_http_proxy_next_upstream_masks },

+ { ngx_string("proxy_cache_updating_timeout"),
+
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_msec_slot,
+ NGX_HTTP_LOC_CONF_OFFSET,
+ offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_updating_timeout),
+ NULL },
+
{ ngx_string("proxy_cache_methods"),

NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
ngx_conf_set_bitmask_slot,
@@ -3388,6 +3395,7 @@
conf->upstream.no_cache = NGX_CONF_UNSET_PTR;
conf->upstream.cache_valid = NGX_CONF_UNSET_PTR;
conf->upstream.cache_lock = NGX_CONF_UNSET;
+ conf->upstream.cache_updating_timeout = NGX_CONF_UNSET_MSEC;
conf->upstream.cache_lock_timeout = NGX_CONF_UNSET_MSEC;
conf->upstream.cache_lock_age = NGX_CONF_UNSET_MSEC;
conf->upstream.cache_revalidate = NGX_CONF_UNSET;
diff -r 3db945fda515 -r f8f6290d6061 src/http/ngx_http_cache.h
--- a/src/http/ngx_http_cache.h Fri Sep 22 19:23:57 2023 +0400
+++ b/src/http/ngx_http_cache.h Sun Oct 01 16:12:20 2023 +0900
@@ -59,6 +59,7 @@
size_t body_start;
off_t fs_size;
ngx_msec_t lock_time;
+ ngx_msec_t last_updating_time;
} ngx_http_file_cache_node_t;


@@ -122,6 +123,8 @@

unsigned stale_updating:1;
unsigned stale_error:1;
+
+ ngx_msec_t updating_timeout;
};
diff -r 3db945fda515 -r f8f6290d6061 src/http/ngx_http_file_cache.c
--- a/src/http/ngx_http_file_cache.c Fri Sep 22 19:23:57 2023 +0400
+++ b/src/http/ngx_http_file_cache.c Sun Oct 01 16:12:20 2023 +0900
@@ -643,6 +643,10 @@
ngx_shmtx_lock(&cache->shpool->mutex);

if (c->node->updating) {
+ if (c->updating_timeout != NGX_CONF_UNSET_MSEC
+ && ngx_current_msec - c->node->last_updating_time >
c->updating_
timeout) {
+ c->node->updating = 0;
+ }
rc = NGX_HTTP_CACHE_UPDATING;

} else {
@@ -1377,6 +1381,10 @@

cache = c->file_cache;

+ ngx_shmtx_lock(&cache->shpool->mutex);
+ c->node->last_updating_time = ngx_current_msec;
+ ngx_shmtx_unlock(&cache->shpool->mutex);
+
c->updated = 1;
c->updating = 0;
diff -r 3db945fda515 -r f8f6290d6061 src/http/ngx_http_upstream.c
--- a/src/http/ngx_http_upstream.c Fri Sep 22 19:23:57 2023 +0400
+++ b/src/http/ngx_http_upstream.c Sun Oct 01 16:12:20 2023 +0900
@@ -877,6 +877,7 @@
c->body_start = u->conf->buffer_size;
c->min_uses = u->conf->cache_min_uses;
c->file_cache = cache;
+ c->updating_timeout = u->conf->cache_updating_timeout;

switch (ngx_http_test_predicates(r, u->conf->cache_bypass)) {

diff -r 3db945fda515 -r f8f6290d6061 src/http/ngx_http_upstream.h
--- a/src/http/ngx_http_upstream.h Fri Sep 22 19:23:57 2023 +0400
+++ b/src/http/ngx_http_upstream.h Sun Oct 01 16:12:20 2023 +0900
@@ -199,6 +199,8 @@
ngx_uint_t cache_use_stale;
ngx_uint_t cache_methods;

+ ngx_msec_t cache_updating_timeout;
+
off_t cache_max_range_offset;

ngx_flag_t cache_lock;
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Subject Author Views Posted

Fixed stucking cache status into UPDATING. #2162

u5h 266 October 01, 2023 07:00PM



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