Memory leak in Infinispan QueryResultsRegionImpl for cacheable Hibernate queries executed outside a transaction in JBoss EAP

Solution In Progress - Updated -

Issue

  • Defined a cacheable query

    @NamedQuery(name = "EmployeeQuery", query = "FROM Employee e WHERE e.name = :name",
        hints = { @QueryHint(name = "org.hibernate.cacheable", value = "true") }
    )
    
  • Executing the query outside a transaction
  • Memory usage grows with each query execution as indicated by heap analysis

    Class Name                                                                 | Shallow Heap | Retained Heap | Percentage
    -----------------------------------------------------------------------------------------------------------------------
    org.infinispan.hibernate.cache.v53.impl.QueryResultsRegionImpl @ 0xb7316a80|           56 | 1,024,011,584 |     96.55%
    |- java.util.concurrent.ConcurrentHashMap @ 0xb7316af0                     |           64 | 1,024,011,472 |     96.55%
    |  '- java.util.concurrent.ConcurrentHashMap$Node[524288] @ 0xe0fe2800     |    2,097,168 | 1,024,011,408 |     96.55%
    |     |- java.util.concurrent.ConcurrentHashMap$Node @ 0xbcf1df60          |           32 |        24,672 |      0.00%
    |     |- java.util.concurrent.ConcurrentHashMap$Node @ 0xbcd40238          |           32 |        24,672 |      0.00%
    |     |- java.util.concurrent.ConcurrentHashMap$Node @ 0xb2c1f750          |           32 |        24,672 |      0.00%
    |     |- java.util.concurrent.ConcurrentHashMap$Node @ 0xd707aef8          |           32 |        24,672 |      0.00%
    |     |- java.util.concurrent.ConcurrentHashMap$Node @ 0xbf1e04d0          |           32 |        20,560 |      0.00%
          ...
    -----------------------------------------------------------------------------------------------------------------------
    

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP) 7.2
  • Infinispan 9.3

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