I keep getting NYX_NOTICEs about "Relay unresponsive". They happen every few hours, and last for minutes or sometimes a couple of hours before I get a "relay resumed" message.
But, I don't see anything in the actual Tor logs to indicate that anything is wrong. Does anyone know how best to troubleshoot this? I *think* it's impacting my consensus weight and making it drop, and is keeping me from getting the Guard flag.
This is the relay: https://metrics.torproject.org/rs.html#details/94626BD21119568EB301D1E7677B2...
Thanks for any tips!
Hi Davin. Unfortunately I can't tell you offhand what's up, but as Nyx's author I can tell you what that message means.
Nyx constantly communicates with the tor process. At the very minimum tor emits a bandwidth event each second, which means that Nyx should constantly hear from the tor process.
Nyx reports that message when it hasn't heard from tor in ten seconds. This means that the tor process is struggling, usually due to resource contention (for instance pegged CPU usage). You'll need to use tor's other logs and check 'top' when tor becomes unresponsive to learn more.
Cheers! -Damian
On Mon, Jun 8, 2020 at 12:47 PM Davin Mertens davinmertens@gmail.com wrote:
I keep getting NYX_NOTICEs about "Relay unresponsive". They happen every few hours, and last for minutes or sometimes a couple of hours before I get a "relay resumed" message.
But, I don't see anything in the actual Tor logs to indicate that anything is wrong. Does anyone know how best to troubleshoot this? I think it's impacting my consensus weight and making it drop, and is keeping me from getting the Guard flag.
This is the relay: https://metrics.torproject.org/rs.html#details/94626BD21119568EB301D1E7677B2...
Thanks for any tips! _______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
I keep getting NYX_NOTICEs about "Relay unresponsive". They happen every few hours, and last for minutes or sometimes a couple of hours before I get a "relay resumed" message.
As Damian Johnson has said, it is hard to guess the cause without more clues. But keep in mind that 2MB/s with 7k connections puts a considerable load on the operating system. Are you sure it’s not your machine that is limiting performance of your relay? That could cause temporary, short lockups, preventing nyx from receiving notifications from the relay in time and considering it unresponsive.
That’s my guess after seeing that your average traffic hovers under 200kB/s. This alone does not indicate any problems with your configuration yet, because it’s also a matter of how much connections you actually receive. But together with the “Relay unresponsive” warning it reminds me of what I see when my own node is experiencing hiccups during high load from other sources.
Based on both your suggestions, I stopped a resource-intensive job that was running, and also "reniced" Tor to give it priority. Since then, I haven't encountered more "resource unresponsive" warnings.
Thanks for your help!
On 6/8/20 4:38 PM, mpan wrote:
I keep getting NYX_NOTICEs about "Relay unresponsive". They happen every few hours, and last for minutes or sometimes a couple of hours before I get a "relay resumed" message.
As Damian Johnson has said, it is hard to guess the cause without more clues. But keep in mind that 2MB/s with 7k connections puts a considerable load on the operating system. Are you sure it’s not your machine that is limiting performance of your relay? That could cause temporary, short lockups, preventing nyx from receiving notifications from the relay in time and considering it unresponsive.
That’s my guess after seeing that your average traffic hovers under 200kB/s. This alone does not indicate any problems with your configuration yet, because it’s also a matter of how much connections you actually receive. But together with the “Relay unresponsive” warning it reminds me of what I see when my own node is experiencing hiccups during high load from other sources.
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Damian Johnson -
Davin Mertens -
mpan