@Override
  public boolean exceptionInThreads() {
    return exceptionInThreads
        || LoggingUncaughtExceptionHandler.getUncaughtExceptionsCount() > 0;
  }
Did an exception occur in one of the threads launched by this distribution manager?
geode-core/src/main/java/org/apache/geode/distributed/internal/ClusterDistributionManager.java