The cache lookup and add operation use different key in plugin
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Key: TS-343
URL: https://issues.apache.org/jira/browse/TS-343
Project: Traffic Server
Issue Type: Bug
Components: Cache
Affects Versions: 2.0.0
Reporter: Flier Lu
I'm developing a cache plugin base on the redis,
http://code.google.com/p/rediscache/
The plugin could be loaded and hook the cache read/write operations
[May 9 16:25:05.012] Server {3079476928} NOTE: loading plugin
'libexec/trafficserver/redis_cache.so'
[May 9 16:25:05.014] Server {3079476928} DIAG: (cache_plugin) [INKPluginInit]
Starting redis cache plugin
But the cache lookup and add operation use different key, it seems use the url
as lookup key
[May 9 16:25:13.149] Server {3066555280} DEBUG: (cache_plugin)
[CacheProcessor::open_read] Cache hooks are set
[May 9 16:25:13.153] Server {3066555280} DEBUG: (cache_plugin)
[NewCacheVC::alloc] new B33B1EE0
[May 9 16:25:13.153] Server {3066555280} DEBUG: (cache_plugin)
[NewCacheVC::set_cache_http_hdr]
[May 9 16:25:13.153] Server {3066555280} DIAG: (cache_plugin) [cache_read]
[May 9 16:25:13.153] Server {3066555280} DEBUG: (cache_plugin)
[INKCacheKeyGet] vc get cache key
[May 9 16:25:13.158] Server {3066555280} DIAG: (cache_plugin) cache hitted for
key: http://www.baidu.com/ w/ 0 bytes value
[May 9 16:25:13.158] Server {3066555280} DEBUG: (cache_plugin)
[INKHttpCacheReenable] event id: 1133 data: 0 size: 0
[May 9 16:25:13.158] Server {3066555280} DEBUG: (cache_plugin)
[INKHttpCacheReenable] cache_lookup_complete
[May 9 16:25:13.158] Server {3066555280} DEBUG: (cache_plugin)
[INKHttpCacheReenable] open read failed
but store the cache item with a random MD5 as key
[May 9 16:25:13.334] Server {3079476928} DEBUG: (cache_plugin)
[NewCacheVC::handleWrite] event=1
[May 9 16:25:13.334] Server {3079476928} DIAG: (cache_plugin) [cache_write]
[May 9 16:25:13.334] Server {3079476928} DEBUG: (cache_plugin)
[INKCacheKeyGet] vc get cache key
[May 9 16:25:13.346] Server {3079476928} DIAG: (cache_plugin) put 3571 bytes
value to redis w/ 16 bytes key: 0xb33b1fb0
[May 9 16:25:13.346] Server {3079476928} DEBUG: (cache_plugin)
[INKHttpCacheReenable] event id: 1129 data: 0 size: 3571
[May 9 16:25:13.346] Server {3079476928} DEBUG: (cache_plugin)
[INKHttpCacheReenable] cache_write
I'm not sure whether it is a design issue or bug ? and the cache lookup always
has 0 size buffer ?
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