hi folks,
i'm puzzled by memcache related logs i see and need your advice.
i'm running a java app. i use memcache as a holder of some static variables
accessed and changed by different modules.
i do it, because as far as i understand such changes will apply to all
distributed application instances.
the initialization of the memcache is done within an init() method of a
servlet flagged with <load-on-startup>.
i have a following piece of code there:
if(CacheManager.getInstance().getCache("static_vars") == null)
{
CacheFactory cacheFactory = CacheManager.getInstance().getCacheFactory();
Cache cache = cacheFactory.createCache(Collections.emptyMap());
CacheManager.getInstance().registerCache("static_vars", cache);
cache.put("var1", 0);
cache.put("var2", 9302);
.....
}
now, i'm watching the logs and i see two requests arriving within 2 seconds.
the first one targets an existing instance and everything goes as expected,
but the second one triggers a creation of new servlet instance that loads
the cache. i guess it happens because another application instance is
created. the problem is that i see that in this new instance
CacheManager.getInstance().getCache("static_vars") == null. the new instance
does not recognize that a memcache with this name already exists and
therefore does not use the values that were set there by first instance.
what's my problem here?
thanks in advance.
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