netopeer2-server crash after SSH socket error: connection timed out.

[DaemonZhao]

Hi，Michal Recently，I got some questions about netopeer2-server which crashed sometime，Especially when the network latency increases； Here is the log when netopeer2-serer crashed:

_INF]: NP: Session 8: thread 3 event new RPC. [2024/06/22 15:26:02.778992, 1] ssh_socket_exception_callback: Socket exception callback: 2 (110) [2024/06/22 15:26:02.779238, 1] ssh_socket_exception_callback: Socket error: Connection timed out [ERR]: LN: Session 8: SSH channel poll error (Socket error: Connection timed out). [INF]: NP: Session 8: thread 2 event session terminated. [ERR]: LY: Invalid union value "hmac-sha1,hmac-sha2-256,hmac-sha2-512" - no matching subtype found. (Schema location "/ietf-netconf-notifications:netconf-session-end/source-host".) [ERR]: SR: Invalid union value "hmac-sha1,hmac-sha2-256,hmac-sha2-512" - no matching subtype found. (Schema location "/ietf-netconf-notifications:netconf-session-end/source-host".) [WRN]: NP: Failed to send a notification (libyang error). [INF]: LN: Call Home client "default-client" session terminated. [INF]: LN: Trying to connect via IPv4 to 192.168.30.1:4334. [ERR]: SR: Internal error (/home/wwh1/path/sysrepo-2.1.84/src/common.c:3976). [ERR]: SR: Internal error (/home/wwh1/path/sysrepo-2.1.84/src/common.c:3976).

Hardware: Embedded Operating System

uname -a

Linux ultichip 4.19.78-ucV1.2.1 #5 Wed Nov 8 15:51:58 CST 2023 armv7l GNU/Linux Version: netopeer2-server -V netopeer2-server 2.1.36 sysrepoctl -V sysrepoctl - sysrepo YANG schema manipulation tool, compiled with libsysrepo v2.1.84 (SO v7.8.10)

[DaemonZhao]

There is another scenario that would cause the service's call home process to terminate：When there is a significant network latency， like this: [INF]: NP: Session 18: thread 4 event new RPC. [2024/06/22 15:06:47.292686, 1] ssh_socket_exception_callback: Socket exception callback: 1 (0) [2024/06/22 15:06:47.292908, 1] ssh_socket_exception_callback: Socket error: disconnected [ERR]: LN: Session 18: SSH channel poll error (Socket error: disconnected). [INF]: NP: Session 18: thread 4 event session terminated. [INF]: LN: Call Home client "default-client" session terminated. [INF]: LN: Trying to connect via IPv4 to 192.168.30.1:4334. [INF]: LN: getsockopt() error (Connection refused). [ERR]: LY: Invalid union value "0▒^E" - no matching subtype found. (Schema location "/ietf-netconf-notifications:netconf-session-end/source-host".) [ERR]: SR: Invalid union value "0▒^E" - no matching subtype found. (Schema location "/ietf-netconf-notifications:netconf-session-end/source-host".) [WRN]: NP: Failed to send a notification (libyang error). [ERR]: SR: Internal error (/home/wwh1/netop-1013/ntsim-compile/4_OpenSourceCode/2022_08_03/sysrepo-2.1.84/src/common.c:3976). [ERR]: SR: Internal error (/home/wwh1/netop-1013/ntsim-compile/4_OpenSourceCode/2022_08_03/sysrepo-2.1.84/src/common.c:3976). [ERR]: LN: Call Home client "default-client" was not found. [INF]: LN: Call Home client "default-client" thread exit.

Is this normal? And how can it be restored?

[michalvasko]

Please update all the libraries and netopeer2, I cannot help you with such an outdated version, there were lots of problems fixed since.

[DaemonZhao]

Do you mean to use the latest Tag version of the libraries and netopeer2? Eg: netopeer2 V2.2.19 libyang V2.2.8 libnetconf2 V3.0.17 These library versions compatible with each other, right? Please provide guidance. Thank you so much.

[michalvasko]

You always see all the versions on netopeer2 release page (which correspond to the master branches of the projects). But there were some problems with this release so the safest is to use the devel branches. There should be a new release soon but I am still fixing some things.

[DaemonZhao]

Okay, I understand. Thank you very much for your prompt response.