Killing the Alluxio test cluster to test fault tolerance leaks many threads and destabilizes the build. We need to either kill the cluster in a way which kills all threads, or find a different way to test fault tolerance.
The specific culprits are MasterFaultToleranceIntegrationTest and JournalIntegrationTest. They have been @Ignored until this ticket is resolved.
To reproduce, you can add
to a class which gets used by the test.