### Question:
DistStageAck implements Serializable { public void setRemoteException(Throwable remoteException) { StringBuilder sb = new StringBuilder(); Set<Throwable> causes = new HashSet(); while (remoteException != null) { sb.append(remoteException.toString()); StackTraceElement[] stackTraceElements = remoteException.getStackTrace(); if (stackTraceElements != null && stackTraceElements.length > 0) { for (StackTraceElement ste : stackTraceElements) { sb.append("\n\t at ").append(ste.toString()); } sb.append("\nsuppressed: "); sb.append(Arrays.toString(remoteException.getSuppressed())); if (remoteException.getCause() != null) { sb.append("\ncaused by: "); remoteException = remoteException.getCause(); if (!causes.add(remoteException)) { break; } } else { break; } } } remoteExceptionString = sb.append('\n').toString(); } DistStageAck(WorkerState workerState); T error(String message); T error(String message, Throwable exception); int getWorkerIndex(); boolean isError(); void setRemoteException(Throwable remoteException); @Override String toString(); void setDuration(long duration); long getDuration();  }### Answer:
@Test(timeOut = 500) public void testInfiniteLoopInExceptionCause() { Exception exception = new Exception(); Exception exception1 = new Exception(); exception1.initCause(exception); exception.initCause(exception1); DistStageAck distStageAck = new DistStageAck(new WorkerState()); distStageAck.setRemoteException(exception); }