[KARAF-7839] Karaf client ssh idleTimeout not working

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.4.3, 4.4.6
• Fix Version/s: 4.5.0, 4.4.7
• Component/s: karaf
• Assignee: Jean-Baptiste Onofré
• Reporter: Piotr Klimczak
• Created: 17/Jun/24 13:41
• Updated: 13/Jul/24 05:16
• Resolved: 13/Jul/24 05:16

Description

Karaf client idle timeout doesn't work if longer than 60s (default for heart beat).

This can be reproduced by:

1. Downloading vanilla karaf
2. Changing idle timeout in "org.apache.karaf.shell.cfg" to "sshIdleTimeout = 90000"
3. Start karaf with ./bin/karaf
4. Start client in separate terminal with ./bin/client

Suspicion is that the bug was introduced here: https://issues.apache.org/jira/browse/KARAF-7051

Last tested and working version for me was 4.3.1. Not tested any other 4.3 versions.

This is from test client:

karaf@root()> date
Jun Mon 17 14:41:50 2024
karaf@root()> date
Jun Mon 17 14:50:08 2024
karaf@root(config)> config:list | grep ssh                                                                                                                                             
   ssh = org.apache.karaf.shell.ssh
   featuresBoot = instance/4.4.6, package/4.4.6, log/4.4.6, ssh/4.4.6, framework/4.4.6, system/4.4.6, eventadmin/4.4.6, feature/4.4.6, shell/4.4.6, management/4.4.6, service/4.4.6, jaas/4.4.6, deployer/4.4.6, diagnostic/4.4.6, wrap/2.6.14, bundle/4.4.6, config/4.4.6, kar/4.4.6
   sshHost = 0.0.0.0
   sshIdleTimeout = 90000
   sshPort = 8101
   sshRealm = karaf
   sshRole = ssh
   log4j2.logger.sshd.level = INFO
   log4j2.logger.sshd.name = org.apache.sshd
   feature.ssh = ssh
 

client should have timed out before 2nd date command, but it didn't.

We only noticed that because our containers started running out of memory and it was caused by many "client" instances open within container.

Issue Links

• relates to: KARAF-7844 Upgrade to sshd 2.13.1