private void failRequest(RequestTransaction transaction) {
        // Try to fail it!
        transaction.getCompletionFuture().cancel(true);
        // End it
        endRequest(transaction);
    }
Important, this is a FIFO Queue for Fairness!
plc4j/spi/src/main/java/org/apache/plc4x/java/spi/transaction/RequestTransactionManager.java