[infinispan-issues] [JBoss JIRA] (ISPN-12325) Hot Rod server instances in tests use too much memory

Hot Rod server instances in tests use too much memory ----------------------------------------------------- Key: ISPN-12325 URL: https://issues.redhat.com/browse/ISPN-12325 Project: Infinispan Issue Type: Bug Components: Server, Test Suite Affects Versions: 12.0.0.Dev03 Reporter: Dan Berindei Assignee: Dan Berindei Priority: Major Fix For: 12.0.0.Dev05 When a test class finishes, TestNG does not discard the test instance, instead it keeps it in memory until the test suite finishes. This means test class fields that uses a lot of memory will accumulate in memory, making the test suite use a lot more heap than it should. ISPN-8478 added a generic way to set {{Cache}} and {{EmbeddedCacheManager}} fields to {{null}} in order to reduce memory usage, but hotrod-client tests do not have anything similar for {{HotRodServer}} and {{RemoteCacheManager}} fields. That might need to change: hotrod-client tests often keep references to {{HotRodServer}} instances in fields, and the servers use > 3MB, most of it in the {{SerializationContextRegistryImpl}}: {noformat} Class Name | Shallow Heap | Retained Heap | Percentage ------------------------------------------------------------------------------------------------------------------------------------------------------------- org.infinispan.client.hotrod.ReplTopologyChangeTest @ 0xc52bf018 | 96 | 10,358,136 | 1.02% |- org.infinispan.server.hotrod.test.HotRodTestingUtil$1 @ 0xe30cc538 | 128 | 3,420,600 | 0.34% | |- org.infinispan.marshall.protostream.impl.SerializationContextRegistryImpl @ 0xcd18d210 | 24 | 2,493,584 | 0.25% | | |- org.infinispan.marshall.protostream.impl.SerializationContextRegistryImpl$MarshallerContext @ 0xe3d18c08| 32 | 2,358,320 | 0.23% | | | |- org.infinispan.protostream.impl.SerializationContextImpl @ 0xe3d18e78 | 64 | 2,357,696 | 0.23% | | | | |- org.infinispan.protostream.descriptors.FileDescriptor @ 0xe3d67fe0 | 72 | 967,680 | 0.10% | | | | | |- org.infinispan.protostream.descriptors.FileDescriptor @ 0xe41b8798 | 72 | 690,528 | 0.07% | | | | | | |- org.infinispan.protostream.descriptors.FileDescriptor @ 0xc997eaf8 | 72 | 413,376 | 0.04% | | | | | | | |- org.infinispan.protostream.descriptors.FileDescriptor @ 0xc5ed3cd8 | 72 | 214,640 | 0.02% | | | | | | | | |- org.infinispan.protostream.descriptors.FileDescriptor @ 0xc5ed4b60 | 72 | 183,648 | 0.02% | | | | | | | | | |- org.infinispan.protostream.descriptors.Descriptor @ 0xc5edabe8 | 72 | 132,104 | 0.01% ------------------------------------------------------------------------------------------------------------------------------------------------------------- {noformat}