[infinispan-issues] [JBoss JIRA] Created: (ISPN-1341) Eviction treats FIFO as LRU

[Jozef Vilkolak (JIRA)]

Eviction treats FIFO as LRU
---------------------------

                 Key: ISPN-1341
                 URL: https://issues.jboss.org/browse/ISPN-1341
             Project: Infinispan
          Issue Type: Bug
          Components: Eviction
    Affects Versions: 5.0.0.FINAL
            Reporter: Jozef Vilkolak
            Assignee: Manik Surtani


When a cache is created with eviction strategy set to FIFO it is actually treated as being LRU. This can be seen in org.infinispan.container.DefaultDataContainer.java.
Functional test for FIFO eviction can be found at [https://svn.devel.redhat.com/repos/jboss-qa/edg/edg-functional-tests/trunk/] in the eviction-strategy module.
Basically what the test does is insert 3 values into the cache then retrieves the first value(to differentiate FIFO and LRU) and inserts 4th value which sets eviction in motion because of maxEntries=3. 
I would expect the first entered value ("A") to be evicted instead it evicts the second ("B").
It uses the following cache configuration:
{code:xml}
<local-cache 
    name="fifo"
    start="EAGER"
    batching="false"
    indexing="NONE">
    <locking
        isolation="REPEATABLE_READ"
        acquire-timeout="20000"
        concurrency-level="500"
        striping="false" />
    <eviction 
        strategy="FIFO" 
        max-entries="3" 
        interval="2000"/>
</local-cache>
{code}

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