TestResourceTracker keeps cache managers alive after they are stopped --------------------------------------------------------------------- Key: ISPN-8036 URL: https://issues.jboss.org/browse/ISPN-8036 Project: Infinispan Issue Type: Bug Components: Test Suite - Core Affects Versions: 9.1.0.CR1, 9.0.3.Final Reporter: Dan Berindei Assignee: Dan Berindei Labels: testsuite_stability Fix For: 9.1.0.Final {{TestCacheManagerFactory.newDefaultCacheManager()}} adds the manager to {{TestResourceTracker}} so if the test doesn't stop it explicitly, {{TestResourceTracker}} will. When a test uses {{@CleanupAfterMethod}}, however, the cache managers are stopped and recreated after each method, but the list of resources is only cleared at the end of the test class. If a test has lots of methods, like {{LocalDistributedExecutorTest}} and its subclasses, the stopped managers can use a lot of memory (250KB for each {{ComponentMetadataRepo}}). I believe the extra memory usage is causing longer GC pauses, and in turn leads to intermittent test failures in test methods that use short timeouts: {noformat} 16:58:34,801 ERROR (testng-ReplSyncDistributedExecutorTest:[]) [TestSuiteProgress] Test failed: org.infinispan.distexec.ReplSyncDistributedExecutorTest.testInvokeAnyTimedSleepingTasks java.lang.AssertionError: Should have thrown an class java.util.concurrent.TimeoutException at org.infinispan.test.Exceptions.assertException(Exceptions.java:21) ~[test-classes/:?] at org.infinispan.test.Exceptions.expectException(Exceptions.java:92) ~[test-classes/:?] at org.infinispan.distexec.LocalDistributedExecutorTest.testInvokeAnyTimedSleepingTasks(LocalDistributedExecutorTest.java:269) ~[test-classes/:?] {noformat}