[SSHD-1257] Shell is not getting closed if the command has already closed the OutputStream it is using.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.9.0
• Fix Version/s: 2.9.0
• Assignee: Thomas Wolf
• Reporter: Vincent Latombe
• Created: 31/Mar/22 13:25
• Updated: 05/Apr/22 18:41
• Resolved: 05/Apr/22 18:41

Description

When running a org.apache.sshd.server.command.Command, if it happens to close the OutputStream instance it is using, then later when the ssh session closes, it attempts to flush the output stream before closing it.

This causes the  following warning to be printed on server side

WARNING o.a.s.s.channel.ChannelSession#lambda$prepareCommand$0: onExit(ChannelSession[id=0, recipient=0]-ServerSessionImpl[admin@/0:0:0:0:0:0:0:1:49944]) code=0 message='' SshChannelClosedException closing shell: flush(ChannelOutputStream[ChannelSession[id=0, recipient=0]-ServerSessionImpl[admin@/0:0:0:0:0:0:0:1:49944]] SSH_MSG_CHANNEL_DATA) length=0 - stream is already closed

and EOF is never sent to client.

Issue Links

• links to: PR #214