d9e7381f opened a new issue, #461: URL: https://github.com/apache/mina-sshd/issues/461
### Version 2.6.0 ### Bug description In my case, 20 connections were established using the same mina ssh client, 10 to A-server(mina ssh server) and the others to B-server(mina ssh server). For a period of time, the network from client to B-server was not smooth. At this time, we found that the session from client to A-server was also disconnected. i got some log from A-server: ` INFO - sshd-SshServer[150d80c4](port=8822)-timer-thread-1 [] c.s.p.t.s.s.CustomServerSessionImpl []: Disconnecting(CustomServerSessionImpl[classic-tx-beijing-01:hybrid01.classic-tx-beijing-01.8330@/10.53.4.116:12033]): SSH2_DISCONNECT_PROTOCOL_ERROR - Detected IdleTimeout after PT40.068S/PT40S ms. ` I checked the mina ssh code and found that the same ssh client shares a thread for sending heartbeats. This will cause one session to send heartbeats and block other sessions from sending heartbeats, causing other sessions to be disconnected. ### Actual behavior In my case, 20 connections were established using the same mina ssh client, 10 to A-server(mina ssh server) and the others to B-server(mina ssh server). For a period of time, the network from client to B-server was not smooth. At this time, we found that the session from client to A-server was also disconnected. i got some log from A-server: ` INFO - sshd-SshServer[150d80c4](port=8822)-timer-thread-1 [] c.s.p.t.s.s.CustomServerSessionImpl []: Disconnecting(CustomServerSessionImpl[classic-tx-beijing-01:hybrid01.classic-tx-beijing-01.8330@/10.53.4.116:12033]): SSH2_DISCONNECT_PROTOCOL_ERROR - Detected IdleTimeout after PT40.068S/PT40S ms. ` ### Expected behavior When the network from client to B-server is not smooth, the channel from client to A-server should not be disconnected. ### Relevant log output ```Shell client to B-server log: WARN - sshd-timer-thread-1 [] c.SshClientCreator$4$1 []: sendHeartBeat(ClientSessionImpl[classic-tx-beijing-01:hybrid01.classic-tx-beijing-01.8330@aa.cloud/10.235.88.64:8800]) failed (IOException) to send heartbeat #7 request=keepal...@tunnel.mock.cn: Session is closed or closing while awaiting reply for request=keepal...@mock.cn org.apache.sshd.common.SshException: DefaultConnectFuture[classic-tx-beijing-01.cloud:hybrid01.classic-tx-beijing-01.cloud.8329@aa.cloud/10.235.88.64:8800]: Failed to get operation result within specified timeout: 20000 A-server log: INFO - sshd-SshServer[150d80c4](port=8822)-timer-thread-1 [] c.s.p.t.s.s.CustomServerSessionImpl []: Disconnecting(CustomServerSessionImpl[classic-tx-beijing-01:hybrid01.classic-tx-beijing-01.8330@/10.53.4.116:12033]): SSH2_DISCONNECT_PROTOCOL_ERROR - Detected IdleTimeout after PT40.068S/PT40S ms. ``` ### Other information _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org For additional commands, e-mail: dev-h...@mina.apache.org
