How to use

unwrapCause

method

in

com.netflix.hystrix.contrib.javanica.exception.ExceptionUtils

@Override
@SuppressWarnings("unchecked")
protected List<Object> getFallback() {
  if (getFallbackAction() != null) {
    final CommandAction commandAction = getFallbackAction();
    try {
      return (List<Object>) process(new Action() {
        @Override
        Object execute() {
          MetaHolder metaHolder = commandAction.getMetaHolder();
          Object[] args = toArgs(getCollapsedRequests());
          args = createArgsForFallback(args, metaHolder, getExecutionException());
          return commandAction.executeWithArgs(commandAction.getMetaHolder().getFallbackExecutionType(), args);
        }
      });
    } catch (Throwable e) {
      LOGGER.error(FallbackErrorMessageBuilder.create()
          .append(commandAction, e).build());
      throw new FallbackInvocationException(unwrapCause(e));
    }
  } else {
    return super.getFallback();
  }
}

LOGGER.error(FallbackErrorMessageBuilder.create()
    .append(commandAction, e).build());
throw new FallbackInvocationException(unwrapCause(e));

@Override
@SuppressWarnings("unchecked")
protected List<Object> getFallback() {
  if (getFallbackAction() != null) {
    final CommandAction commandAction = getFallbackAction();
    try {
      return (List<Object>) process(new Action() {
        @Override
        Object execute() {
          MetaHolder metaHolder = commandAction.getMetaHolder();
          Object[] args = toArgs(getCollapsedRequests());
          args = createArgsForFallback(args, metaHolder, getExecutionException());
          return commandAction.executeWithArgs(commandAction.getMetaHolder().getFallbackExecutionType(), args);
        }
      });
    } catch (Throwable e) {
      LOGGER.error(FallbackErrorMessageBuilder.create()
          .append(commandAction, e).build());
      throw new FallbackInvocationException(unwrapCause(e));
    }
  } else {
    return super.getFallback();
  }
}

LOGGER.error(FallbackErrorMessageBuilder.create()
    .append(commandAction, e).build());
throw new FallbackInvocationException(unwrapCause(e));