Test Failure: org.apache.cassandra.simulator.test.HarrySimulatorTest.harryTest

java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Direct buffer memory
	at org.apache.cassandra.utils.Throwables.maybeFail(Throwables.java:79)
	at org.apache.cassandra.utils.FBUtilities.waitOnFutures(FBUtilities.java:537)
	at org.apache.cassandra.distributed.impl.AbstractCluster.close(AbstractCluster.java:1098)
	at org.apache.cassandra.simulator.ClusterSimulation.close(ClusterSimulation.java:854)
	at org.apache.cassandra.simulator.test.SimulationTestBase.simulate(SimulationTestBase.java:206)
	at org.apache.cassandra.simulator.test.HarrySimulatorTest.simulate(HarrySimulatorTest.java:361)
	at org.apache.cassandra.simulator.test.HarrySimulatorTest.harryTest(HarrySimulatorTest.java:135)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Caused by: java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Direct buffer memory
	at org.apache.cassandra.utils.concurrent.AbstractFuture.getWhenDone(AbstractFuture.java:239)
	at org.apache.cassandra.utils.concurrent.AbstractFuture.get(AbstractFuture.java:254)
	at org.apache.cassandra.utils.FBUtilities.waitOnFutures(FBUtilities.java:529)
Caused by: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Direct buffer memory
	at org.apache.cassandra.utils.concurrent.AbstractFuture.getWhenDone(AbstractFuture.java:239)
	at org.apache.cassandra.utils.concurrent.AbstractFuture.get(AbstractFuture.java:246)
	at org.apache.cassandra.distributed.impl.Instance.lambda$shutdown$47(Instance.java:978)
	at org.apache.cassandra.concurrent.SyncFutureTask.run(SyncFutureTask.java:68)
	at org.apache.cassandra.simulator.systems.SimulatedExecution$NoIntercept$1Run.run(SimulatedExecution.java:82)
	at org.apache.cassandra.simulator.systems.InterceptingExecutor$InterceptingPooledExecutor$WaitingThread.lambda$new$1(InterceptingExecutor.java:318)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Direct buffer memory
	at org.apache.cassandra.utils.Throwables.maybeFail(Throwables.java:79)
	at org.apache.cassandra.distributed.impl.Instance.lambda$shutdown$46(Instance.java:972)
	at org.apache.cassandra.distributed.impl.IsolatedExecutor.lambda$async$10(IsolatedExecutor.java:156)
	at org.apache.cassandra.concurrent.FutureTask$1.call(FutureTask.java:96)
Caused by: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Direct buffer memory
	at org.apache.cassandra.utils.concurrent.AbstractFuture.getWhenDone(AbstractFuture.java:239)
	at org.apache.cassandra.utils.concurrent.AbstractFuture.get(AbstractFuture.java:246)
	at org.apache.cassandra.hints.HintsService.shutdownBlocking(HintsService.java:282)
	at org.apache.cassandra.distributed.impl.Instance.lambda$shutdown$17(Instance.java:901)
	at org.apache.cassandra.distributed.impl.Instance.lambda$parallelRun$52(Instance.java:1196)
Caused by: java.lang.OutOfMemoryError: Direct buffer memory
	at java.base/java.nio.Bits.reserveMemory(Bits.java:175)
	at java.base/java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:118)
	at java.base/java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:317)
	at org.apache.cassandra.hints.HintsBuffer.create(HintsBuffer.java:77)
	at org.apache.cassandra.hints.HintsBufferPool.createBuffer(HintsBufferPool.java:150)
	at org.apache.cassandra.hints.HintsBufferPool.initializeCurrentBuffer(HintsBufferPool.java:121)
	at org.apache.cassandra.hints.HintsBufferPool.currentBuffer(HintsBufferPool.java:113)
	at org.apache.cassandra.hints.HintsWriteExecutor$FlushBufferPoolTask.run(HintsWriteExecutor.java:168)
	at org.apache.cassandra.concurrent.FutureTask$1.call(FutureTask.java:96)
	at org.apache.cassandra.concurrent.SyncFutureTask.run(SyncFutureTask.java:68)
	at org.apache.cassandra.simulator.systems.SimulatedExecution$NoIntercept$1Run.run(SimulatedExecution.java:82)
	at org.apache.cassandra.simulator.systems.InterceptingExecutor$AbstractSingleThreadedExecutorPlus.lambda$new$0(InterceptingExecutor.java:585)