RPCClient hung on close

[jyrijh]

https://github.com/rabbitmq/rabbitmq-tutorials/tree/master/dotnet-6/RPCClient

Tried the RPC tutorial and client never closed for some reason.
I got the result back from server and showed it and then it got hung on connection.Close().
I added these and then it run to end

public void Close()
    {
        if (channel is not null && channel.IsOpen)
            channel.Close();

        if (connection is not null && connection.IsOpen)
            connection.Close();
    }

[michaelklishin]

We cannot suggest much without any server logs but most likely your node is installed on a partition with very little disk space and it hits an alarm that blocks all publishing connections.

We do not guess in this community and this is not a commonly reported issue. Please see server logs for clues.

[jyrijh]

I'm running it on Docker container, but there is available diskspace

# df
Filesystem     1K-blocks    Used Available Use% Mounted on
overlay        263174212 2763920 246972136   2% /
tmpfs              65536       0     65536   0% /dev
tmpfs            8120852       0   8120852   0% /sys/fs/cgroup
shm                65536       0     65536   0% /dev/shm
/dev/sdd       263174212 2763920 246972136   2% /etc/hosts
tmpfs            8120852       0   8120852   0% /proc/acpi
tmpfs            8120852       0   8120852   0% /sys/firmware

Nodes

Name	File descriptors	Socket descriptors	Erlang processes	Memory	Disk space	Uptime	Info	Reset stats	+/-
rabbit@rabbit-1	36 1048576 available	0 943629 available	406 1048576 available	160 MiB 6.2 GiB high watermark	236 GiB 48 MiB low watermark	1h 36m	basic disc 2 rss

[jyrijh]

This is empty

# ls -l /var/log/rabbitmq
total 0
-rw-r--r-- 1 rabbitmq rabbitmq 0 Jul 14 09:45 rabbit@rabbit-1_upgrade.log

and these don't contain much

# ls -l /var/lib/rabbitmq/mnesia/rabbit@rabbit-1
total 104
-rw-r--r-- 1 rabbitmq rabbitmq   157 Jul 14 10:42 DECISION_TAB.LOG
-rw-r--r-- 1 rabbitmq rabbitmq    96 Jul 14 10:42 LATEST.LOG

And in the console that I opened from docker there wasn't anything either

[michaelklishin]

Docker images very likely log to standard output.

[jyrijh]

So there is nothing in the console log either, first the server connect, and then the client, but client doesn't never close the connection and doesn't reach Console.WriteLine(" Press [enter] to exit.");

And then I have to CRTL+C to end the client

2022-07-15 05:42:02.522408+00:00 [warning] <0.680.0> closing AMQP connection <0.680.0> (172.17.0.1:44774 -> 172.17.0.2:5672, vhost: '/', user: 'guest'):
2022-07-15 05:42:02.522408+00:00 [warning] <0.680.0> client unexpectedly closed TCP connection

If I add these then the client closes connection properly and runs to completion