Server side heartbeat not working

[thevipwan]

Version

master

Bug description

dependency：

<dependency>
    <groupId>org.apache.sshd</groupId>
    <artifactId>sshd-core</artifactId>
    <version>2.7.0</version>
</dependency>

Code：

SshServer sshd = SshServer.setUpDefaultServer();
sshd.setPort(3333);
sshd.setShellFactory(InteractiveProcessShellFactory.INSTANCE);
sshd.setSessionHeartbeat(SessionHeartbeatController.HeartbeatType.IGNORE, Duration.ofSeconds(5));
sshd.setKeyPairProvider(new ClassLoadableResourceKeyPairProvider(getClass().getClassLoader(), "rsa.key"));
sshd.setPasswordAuthenticator((username, password, session) -> username.equals(password));
sshd.start();
log.info("SSHD server started");

ssh Client:

user/passwd = test

ssh [email protected] -p3333 

Actual behavior

read Server Setup Manual last section

I with my SSHD has ServerSide heartbeat，But setSessionHeartbeat API didn't working, ssh session didn't get any interval heartbeat

Expected behavior

SSHD automatic send heartbeat message for each ssh session

Relevant log output

No response

Other information

No response

[tomaswolf]

Why did you expect any heartbeats to be sent when you set heartbeat type NONE?

Try SessionHeartbeatController.HeartbeatType.IGNORE.

[thevipwan]

SessionHeartbeatController.HeartbeatType.IGNORE

Try this, but still can't get any heartbeats

[tomaswolf]

1. I see that you are using version 2.7.0. Please try with 2.9.2, or with the master version.
2. How do you verify whether the client gets heartbeat messages?

[thevipwan]

switch to version 2.9.2 but still not work；I use debug log and Wireshark(Capture port traffic) monitor heartbeat，I'm so confused about it, can you give me correct example code?

[tomaswolf]

Indeed; you're right. It looks like this never worked, and was not caught because there was no test for server-side heartbeats.