static RuntimeException uncheckedException(String prefix, JMSException e) {
    Exception cause = e.getLinkedException();
    if (cause instanceof IOException exception) {
      return new UncheckedIOException(prefix + message(cause), exception);
    }
    return new RuntimeException(prefix + message(e), e);
  }
Count of concurrent message listeners on the queue. Defaults to 1
zipkin-collector/activemq/src/main/java/zipkin2/collector/activemq/ActiveMQCollector.java