[nlbwmon] Netlink receive failure - Invalid input data or parameter

[dsouza]

I installed nlbwmon/luci-app-nlbwmon on a NanoPi R6S running 24.10.0. However luci-app-nlbwmon is not showing any data.

After some basic troubleshooting, I've found the following errors in the log:

Thu Feb  6 21:18:37 2025 daemon.err nlbwmon[14602]: The netlink receive buffer size of 524288 bytes will be capped to 212992 bytes
Thu Feb  6 21:18:37 2025 daemon.err nlbwmon[14602]: by the kernel. The net.core.rmem_max sysctl limit needs to be raised to
Thu Feb  6 21:18:37 2025 daemon.err nlbwmon[14602]: at least 524288 in order to sucessfully set the desired receive buffer size!
Thu Feb  6 21:19:07 2025 daemon.err nlbwmon[14602]: Netlink receive failure: Invalid input data or parameter
Thu Feb  6 21:19:07 2025 daemon.err nlbwmon[14602]: Unable to dump conntrack: I/O error
Thu Feb  6 21:19:37 2025 daemon.err nlbwmon[14602]: Netlink receive failure: Invalid input data or parameter
Thu Feb  6 21:19:37 2025 daemon.err nlbwmon[14602]: Unable to dump conntrack: I/O error
Thu Feb  6 21:20:07 2025 daemon.err nlbwmon[14602]: Netlink receive failure: Invalid input data or parameter
Thu Feb  6 21:20:07 2025 daemon.err nlbwmon[14602]: Unable to dump conntrack: I/O error
Thu Feb  6 21:20:37 2025 daemon.err nlbwmon[14602]: Netlink receive failure: Invalid input data or parameter
Thu Feb  6 21:20:37 2025 daemon.err nlbwmon[14602]: Unable to dump conntrack: I/O error
(...)

I Googled the "Netlink receive failure: Invalid input data or parameter" error but found no reference. Any advice about this issue and how to solve it would be greatly appreciated.

[dsouza]

Never mind. Removed, manually cleaned up its configs (rm /etc/config/nlbwmon, rm -rf /var/lib/nlbwmon, rm -rf /usr/share/nlbwmon/), reinstalled luci_app_nlbwmon and now it is working.