Is there a limit to how many channels can be open per session in JSch?

Is there a limit to how many channels can be open per session in JSch ? The cannels I am trying to open are of type "ChannelShell"

I get an "com.jcraft.jsch.JSchException: channel 开发者_如何学运维is not opened." exception when I try to open the eleventh channel i.e. channel[10] Does this mean that I can have up to 10 channels per session?

P.S. I dont understand how to meet stackoverflow's quality standards.

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OpenSSH's sshd had such a restriction to allow only 10 channels simultaneously, and recent its sshd has introduced the flag 'MaxSession' to sshd_config.

Refer to "man sshd_config",

 MaxSessions
         Specifies the maximum number of open sessions permitted per net-
         work connection.  The default is 10.

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There should not be a limit (other then by the available memory/thread count in your VM, Integer.MAX_VALUE and what the server supports).

I think I've seen a similar error lately (with a single channel, though) - the reason was some race condition, and it was solved in the latest version (0.1.45-RC4, linked from the mailing list).

Try replacing your jsch.jar with the latest one, and check if the problem still appears. (It looks like 0.1.45-RC5 is the latest.) If it still occurs, try to create a minimal example so we can reproduce it.