What is the default timeout for Session and Channel in JSch library in java

Question

Does anyone know the default timeout for Session and Channel.

session.connect();
channel.connect();

I am going through the document but it doesn't explicitly say what is the default timeout ?

Answer 1

For the Channel , the default timeout seems to be 20 seconds.

See the implementation of the Channel.sendChannelOpen() .

The timeout here defines, how long will the connect() wait for a response to open channel request. I'd say that the name of the method is confusing, it should be open() . You are not connecting anywhere (the session is already open).

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For the Session , the default timeout is set using the setTimeout() method. If not set, the default default is 0, what means "infinite". Though there's always some last resort timeout on an OS-level.

The timeout here defines:

• How long will the connect() wait for the socket to open.
  Though this defines an upper limit only, to define a lower limit, see JSch session timeout limit .
• Timeout for all future "reads" from the socket. See the Socket.SetSoTimeout
• It also affects a connection to a proxy, if there's any.