Massa node crash if IPV6 is disabled on server.

[AN09111976]

Hi,

2023-03-06T14:36:43.442323Z INFO massa_bootstrap::client: Bootstrap from server 158.69.120.215:31245 failed. Your node will try to bootstrap from another server in 1m.
2023-03-06T14:37:43.442960Z INFO massa_bootstrap::client: Start bootstrapping from [2001:41d0:1004:67::]:31245
2023-03-06T14:37:43.445509Z WARN massa_bootstrap::client: Error while connecting to bootstrap server: io error: Address family not supported by protocol (os error 97)
2023-03-06T14:37:43.445649Z INFO massa_bootstrap::client: Bootstrap from server [2001:41d0:1004:67::]:31245 failed. Your node will try to bootstrap from another server in 1m.
2023-03-06T14:38:43.446929Z INFO massa_bootstrap::client: Start bootstrapping from 149.202.89.125:31245
2023-03-06T14:38:50.912205Z INFO massa_bootstrap::client: State bootstrap complete
2023-03-06T14:38:50.945931Z INFO massa_bootstrap::client: Successful bootstrap
2023-03-06T14:38:50.947159Z INFO massa_network_worker: The node_id of this node is: [REMOVED]
thread 'main' panicked at 'could not start network controller: IOError(Os { code: 97, kind: Uncategorized, message: "Address family not supported by protocol" })', massa-node/src/main.rs:301:10
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

On the server IPV6 is disabled globally, but in the massa-node config set IPV4 address explicitly:

[network]
bind = "0.0.0.0:31244"
routable_ip="A.B.C.D"

[bootstrap]
bind = "0.0.0.0:31245"

[AurelienFT]

@Leo-Besancon this is related to the changes you made here : https://github.com/massalabs/massa/blob/main/massa-network-exports/src/establisher.rs#L87 ? How can use only ipv4 now ?

[AN09111976]

Thanks for the answer. So now is it mandatory to have IPV6 enabled ? For some reasons, I don't need IPV6 running on the server, what should I do ?

[Leo-Besancon]

Hello @AN09111976, can you please tell me your OS and what happens if you keep the default config values for the network and bootstrap bind? ( bind = "[::]:31244" and bind = "[::]:31245")

[AN09111976]

Linux [hostname] 5.4.0-29-generic #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Now I've changed config:

[network]
bind = "[::]:31244"
routable_ip="A.B.C.D"

[bootstrap]
bind = "[::]:31245"

Let's see what results it will bring to. Next step, I will remove everything and leave only routable_ip=... clause.

[AN09111976]

2023-03-06T18:14:55.443713Z INFO massa_bootstrap::client: State bootstrap complete
2023-03-06T18:14:55.774915Z INFO massa_bootstrap::client: Successful bootstrap
2023-03-06T18:14:55.776270Z INFO massa_network_worker: The node_id of this node is: REMOVED
thread 'main' panicked at 'could not start network controller: IOError(Os { code: 97, kind: Uncategorized, message: "Address family not supported by protocol" })', massa-node/src/main.rs:301:10
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

In config:

[network]
routable_ip="A.B.C.D"

There is STILL problem with IPV6 disabled servers.

[Leo-Besancon]

Thank you, I will try to reproduce on WSL (it works great on my windows with IPv6 disabled) and I will come back to you.

[AN09111976]

It may helps, IPV6 is disabled GLOBALLY on server:

Here is snip from dmesg:

[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=04de2bdd-6962-4cb0-92f1-2f70600cc8a9 ro ipv6.disable=1 quiet elevator=noop fsck.repair=yes ipv6.disable=1 crashkernel=512M-:192M

[ 0.060815] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=04de2bdd-6962-4cb0-92f1-2f70600cc8a9 ro ipv6.disable=1 quiet elevator=noop fsck.repair=yes ipv6.disable=1 crashkernel=512M-:192M

[ 1.241202] IPv6: Loaded, but administratively disabled, reboot required to enable

[Leo-Besancon]

Indeed, just disabling the ipv6 interface was not enough, killing the ipv6 at the system level reproduced the issue.

[Leo-Besancon]

A fix for this issue will be included in the next testnet, and you will need to use the config you initialy used:

bind = "0.0.0.0:31244"
routable_ip="A.B.C.D"

[bootstrap]
bind = "0.0.0.0:31245"