SSHD client losing connection to server

[Moshe Moshe <ka...@gmail.com>]

Hi,

We use SSHD client to run long running commands (1 hour) on remote devices.

Sometimes while the command is executing the physical connection is
lost(for example: network card disabled), when this happens while the
client is executing:
channel.waitFor(ClientChannel.CLOSED, commandTimeout)

the client will hang for a long time until the timeout has ended and return
value is the flags OPENED | TIMEOUT.

Moreorver, it seems that enabling client heatbeat, the client sends
heatbeat :
[sshd-SshClient[1afecda0]-timer-thread-1] DEBUG Nio2Session:104 - Writing
96 bytes
[sshd-SshClient[1afecda0]-nio2-thread-5] DEBUG Nio2Session:220 - Finished
writing

even after the physical connection was lost.


Is there away to check if such physical connection lost has happened?

Thanks.