org.infinispan.transaction.xa.GlobalTransaction objects are not cleared properly -------------------------------------------------------------------------------- Key: ISPN-6518 URL: https://issues.jboss.org/browse/ISPN-6518 Project: Infinispan Issue Type: Bug Components: Transactions Affects Versions: 8.1.3.Final, 8.2.1.Final, 9.0.0.Alpha1 Reporter: Matej Čimbora Assignee: Pedro Ruivo Priority: Critical Fix For: 9.0.0.Alpha2, 8.1.4.Final, 8.2.2.Final, 9.0.0.Final The issue was spotted in 6 hr soak tests and affects both distributed & replicated mode. The test shows steady increase in heap usage. After closer examination of jfr recording, it seems that at the end of the test there are almost 22M live org.infinispan.transaction.xa.GlobalTransaction instances in the heap, totaling 667 MB in size. Top heap consumers (final stage of the test) Class Instances Size(bytes) Percentage of Heap(%) byte[] 60,218 830,445,604 35.168 Class Instances Size(bytes) Percentage of Heap(%) org.infinispan.transaction.xa.GlobalTransaction 21,846,176 699,077,616 29.605 Class Instances Size(bytes) Percentage of Heap(%) java.util.concurrent.ConcurrentHashMap$Node 21,795,718 697,462,992 29.537 Class Instances Size(bytes) Percentage of Heap(%) java.util.concurrent.ConcurrentHashMap$Node[] 129 134,352,464 5.69 Transaction configuration: <transaction transaction-manager-lookup="org.infinispan.transaction.lookup.GenericTransactionManagerLookup" mode="NON_DURABLE_XA" /> Please let me know if you'd like me to share more details from jfr recording.