when long long timeout and no expect msg and shell execed failure, how to throw exec exception quickly?

[juaby]

public static void main(String[] args) throws JSchException, IOException {
        final InputAppendable inputBuffer = new InputAppendable();
        final OutputAppendable outputBuffer = new OutputAppendable();
        JSch jSch = new JSch();
        String prvKeyPath = "~/.ssh/id_rsa";
        jSch.addIdentity(prvKeyPath);
        Session session = jSch.getSession("who", "localhost");
        Properties config = new Properties();
        config.put("StrictHostKeyChecking", "no");
        session.setConfig(config);
        session.connect();
        Channel channel = session.openChannel("shell");
        channel.connect();

        //inputBuffer.setLength(0);
        //outputBuffer.setLength(0);

        Expect expect = new ExpectBuilder()
                .withOutput(channel.getOutputStream())
                .withInputs(channel.getInputStream(), channel.getExtInputStream())
                .withEchoInput(inputBuffer)
                .withEchoOutput(outputBuffer)
                .withInputFilters(removeColors(), removeNonPrintable())
                .withExceptionOnFailure()
                .withAutoFlushEcho(true)
                .build();
        try {
            expect.expect(contains("$"));
            expect.sendLine("ping1 -c 50 jd.com");
            long timeout = 99999999999L;
            boolean result = expect.withTimeout(timeout, TimeUnit.SECONDS).expect(contains("ping statistics")).isSuccessful();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            expect.close();
            channel.disconnect();
            session.disconnect();
        }
    }

[agavrilov76]

Not sure what do you mean by "shell execed failure"? What are you trying to achieve?

[juaby]

It takes a long time for shell to perform a task, set a long timeout time, and don't wait for the final timeout when the shell execution fails, how to immediately throw the exception