[KARAF-4433] Unable to connect to a child instance with instance:connect

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.4
• Fix Version/s: 4.1.0, 4.0.5
• Component/s: karaf

Environment

Windows 7, Oracle JDK 1.8.0_74

• Assignee: Jean-Baptiste Onofré
• Reporter: Vincent MATHON
• Created: 22/Mar/16 13:54
• Updated: 16/Dec/19 06:39
• Resolved: 31/Mar/16 15:42

Description

Steps to reproduce:
1/ install a fresh karaf distribution
2/ launch karaf.bat
3/ root()> instance:create test
4/ root()> instance:start test
5/ root()> instance:connect test
Connecting to host localhost on port 8103
Connecting to unknown server. Automatically adding to known hosts.
Storing the server key in known_hosts.
Password: *****
Connected
Error executing command: Channel opening failed

Note that
6/ root()> instance:connect test info

works perfectly, thus, the problem arises when no command is specified.

The stacktrace looks like :
2016-03-22 14:45:17,203 | ERROR | nsole user karaf | ShellUtil | 44 - org.apache.karaf.shell.core - 4.0.4 | Exception caught while executing command
org.apache.sshd.common.SshException: Channel opening failed at org.apache.sshd.client.future.DefaultOpenFuture.verify(DefaultOpenFuture.java:43)[1:org.apache.sshd.core:0.14.0] at org.apache.karaf.shell.ssh.SshAction.execute(SshAction.java:241)[45:org.apache.karaf.shell.ssh:4.0.4]
......
at java.lang.Thread.run(Thread.java:745)[:1.8.0_74]
Caused by: java.lang.NullPointerException
at org.apache.sshd.common.util.Buffer.putString(Buffer.java:435)