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From "Ilya Lantukh (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (IGNITE-2888) Eviction policy not called upon cache.remove()
Date Mon, 23 May 2016 11:46:12 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-2888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ilya Lantukh reassigned IGNITE-2888:
------------------------------------

    Assignee: Ilya Lantukh

> Eviction policy not called upon cache.remove()
> ----------------------------------------------
>
>                 Key: IGNITE-2888
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2888
>             Project: Ignite
>          Issue Type: Bug
>          Components: cache
>    Affects Versions: 1.5.0.final
>         Environment: java version "1.8.0_73"
> Java(TM) SE Runtime Environment (build 1.8.0_73-b02)
> Java HotSpot(TM) 64-Bit Server VM (build 25.73-b02, mixed mode)
> Windows 10 64bit
>            Reporter: Avihai Berkovitz
>            Assignee: Ilya Lantukh
>
> When I set an eviction policy to a cache it doesn't get called when removing an entry
from the cache. This only happens when using a *REPLICATED* or *PARTITIONED* cache, and only
in *ATOMIC* mode. This is the reason it never came up in the GridCacheConcurrentEvictionConsistencySelfTest
test. If you change the cache parameters in the test you can see the problem easily.
> This causes two problems:
> * Cache entries that were deleted still remain in memory, because the objects are referenced
by the policy
> * The eviction policy "thinks" the cache is larger than it really is, so entries might
be evicted even if there is no need for it
> Here is a small test case to illustrate the problem:
> {code}
> IgniteConfiguration igniteConfig = new IgniteConfiguration()
>         .setGridLogger(new Slf4jLogger())
>         .setDeploymentMode(DeploymentMode.CONTINUOUS);
> try (Ignite ignite = Ignition.start(igniteConfig)) {
>     LruEvictionPolicy evictionPolicy = new LruEvictionPolicy(30);
>     CacheConfiguration<String, String> cacheConfiguration = new CacheConfiguration<String,
String>()
>             .setName("test")
>             .setCacheMode(CacheMode.REPLICATED)
>             .setAtomicityMode(CacheAtomicityMode.ATOMIC)
>             .setEvictionPolicy(evictionPolicy);
>     IgniteCache<String, String> cache = ignite.getOrCreateCache(cacheConfiguration);
>     for (int i = 1; i <= 100; i++) {
>         cache.put("key" + i, "data");
>         System.out.println(String.format("Size: %d, LRU: %d", cache.size(CachePeekMode.ALL),
evictionPolicy.getCurrentSize()));
>         if (i % 5 == 0) {
>             cache.remove("key" + (i-1));
>             System.out.println(String.format("Size: %d, LRU: %d", cache.size(CachePeekMode.ALL),
evictionPolicy.getCurrentSize()));
>         }
>     }
> }
> {code}



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