Random failures in StateProviderTest due to race condition ---------------------------------------------------------- Key: ISPN-4085 URL: https://issues.jboss.org/browse/ISPN-4085 Project: Infinispan Issue Type: Bug Components: Test Suite - Core Affects Versions: 7.0.0.Alpha1 Environment: jgroups.bind_addr = 127.0.0.1 java.runtime.version = 1.7.0_51-b13 java.runtime.name =Java(TM) SE Runtime Environment java.vm.version = 24.51-b03 java.vm.vendor = Oracle Corporation os.name = Mac OS X os.version = 10.9.2 sun.arch.data.model = 64 sun.cpu.endian = little protocol.stack = null infinispan.test.jgroups.protocol = tcp infinispan.unsafe.allow_jdk8_chm = true java.net.preferIPv4Stack = true java.net.preferIPv6Stack = null log4.configuration = null MAVEN_OPTS = null Reporter: Gustavo Fernandes Assignee: Galder Zamarreño Labels: 630 Fix For: 7.0.0.Alpha2, 7.0.0.Final In my environment the StateProviderTest .test2() fails sometimes (about 10% of the time) with the following error(s): {code} Tests run: 4233, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 428.06 sec <<< FAILURE! test2(org.infinispan.statetransfer.StateProviderTest) Time elapsed: 0.042 sec <<< FAILURE! java.lang.AssertionError at org.junit.Assert.fail(Assert.java:92) at org.junit.Assert.assertTrue(Assert.java:43) at org.junit.Assert.assertTrue(Assert.java:54) at org.infinispan.statetransfer.StateProviderTest.test2(StateProviderTest.java:316) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) {code} The reason why is that test2() feeds the StateProvider a ThreadPoolExecutorService to execute a OutboundTransfer task asynchronously and right after forcing a state transfer asserts that there is a StateTransfer in progress. Sometimes the executor service manages to execute the task and as a result it clear the ‘transfersByDestination’ map, and thus the test cannot assert that the state transfer is happening OTOH, the method test1() never fails because it users a mock executor service which never executes the task, so the state transfer map will always contain the outbound task after initiating the state transfer and thus always visible from outside The quick fix is to also use a mock executor test for the test2()