[jira] [Created] (IGNITE-3599) Offheap cache memory leaks

[Alisher Alimov (JIRA)]

Alisher Alimov created IGNITE-3599:
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             Summary: Offheap cache memory leaks
                 Key: IGNITE-3599
                 URL: https://issues.apache.org/jira/browse/IGNITE-3599
             Project: Ignite
          Issue Type: Bug
          Components: cache
    Affects Versions: 1.6
            Reporter: Alisher Alimov


Seems that Offheap cache doesn't free memory resources on IgniteCache#destroy()

Example:
{code}
        CacheConfiguration<UUID, UUID> cacheCfg = new 
CacheConfiguration<>(UUID.randomUUID().toString());
        cacheCfg.setBackups(0);
        cacheCfg.setCacheMode(CacheMode.PARTITIONED);
        cacheCfg.setAtomicityMode(CacheAtomicityMode.ATOMIC);
        cacheCfg.setMemoryMode(CacheMemoryMode.OFFHEAP_TIERED);
        cacheCfg.setEvictionPolicy(new FifoEvictionPolicy(1));
        cacheCfg.setOffHeapMaxMemory(1600000); // ~1 000 000 UUIDs 
        cacheCfg.setSwapEnabled(false);

        for (; ; ) {
            IgniteCache<UUID, UUID> cache = 
analyticsContext.getIgnite().getOrCreateCache(UUID.randomUUID().toString());

            for (int j = 0; j < 1000000; j++) {
                cache.put(UUID.randomUUID(), UUID.randomUUID());
            }

            cache.clear();
            cache.destroy();
        }
{code}

After several iteration for create/fill/destroy operations you could see that 
using memory for current process is always increasing and seems that off heap 
cache doesn't free memory resources on IgniteCache#destroy 



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