[NETCONF-784] ReconnectPromise keep reconnecting after device unregistered

Duplicate — Thu, 18 Nov 2021 11:43:25 +0000

In a netconf device connection failure situation, user may unregister (unmount) the netconf device and try to re-add the device in order to recover. However netconf-connector cannot establish session and "Mount point already exists" error recorded in karaf log.

From karaf log ReconnectPromise try to reconnect again even if the device was unregistered from topology. It seems that unmounting does not clean up resources properly so an orphaned thread keeps working in background.

This issue does not always happen, but one of the reproducible case is missing certificate in keystore.

Confirmed version

Sodium-SR4 (embedded in ONAP Guilin)
Silicon-SR0

Steps to reproduce

install odl-netconf and odl-restconf features
register netconf device using TLS without adding certificate to keystore
connection-status become 'unable-to-connect' and message is 'No keystore private key found' (expected behavior)
Unregister the netconf device
the device is removed from netconf-topology, but ReconnectPromise / NetconfSessionPromise remain working and keep trying to reconnect (can be seen in log)
add device certificates to keystore
register netconf device again
connection-status is 'connecting'
after that, try unregister / register more times but status never become 'connected'.
user has to restart karaf to recover the connection.

OpenDaylight JIRA

[NETCONF-784] ReconnectPromise keep reconnecting after device unregistered

Confirmed version

Steps to reproduce