--- Log opened Thu Jul 01 00:00:53 2021
00:04 < gijswijs> I keep getting this error with my nodes running on regtest: Peer transient failure in CHANNELD_NORMAL: channeld WARNING: update_fee 0 outside range 253-4294967295
00:05 < gijswijs> Where does the update_fee = 0 come from?
00:06 < gijswijs> (I know I posted this here earlier, but I accidentally signed out of IRC, so I don't know if someone has answered)
00:09 < gijswijs> I thought the update_fee comes from bitcoind estimatesmartfee, but if I bootstrap estimatesmartfee, or run bitcoind with the -fallbackfee option, I still get this error.
00:18 < gijswijs> Just checked the logs, and I didn't receive an answer yet... :`(. I could really use some help here, plz.
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00:37 < gijswijs> fiatjaf: The python plugin framework seems to write to stdout
00:38 < gijswijs> It doesn't seem to use the rpc method.
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00:46 < Guest75> Is there a way to know which lightning node payed my invoice? 
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03:01 < mschmoock> cdecker: niftynei: I updated and retested #4617 . Seems we have reproducible issue here on master caused by e81e640e7
03:05 < cdecker[m]> Yeah, my intuition is that it's just the system calls to print logs that are slowing us down here (a log message causes string formatting with at least one allocation, then another allocation to serialize as JSON-RPC notification, then queuing to send to the main daemon, sending, receiving on the main daemon side, parsing, string formatting and then a system call to actually write to stdout)
03:05 < cdecker[m]> We likely just need to remove those noisy log statements, since they're not that useful anyway as they print pointer addresses.
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03:07 < mschmoock> cdecker: the command is also slow with loglevel info.
03:07 < mschmoock> (and no messages printed, not sure if it does the printf internally anyway)
03:08 < mschmoock> let me check...
03:10 < mschmoock> cdecker: seems your right
03:10 < mschmoock> The issue is gone wthout these debug statements
03:14 < mschmoock> I wonder if we can optimize the logger
03:16 < mschmoock> https://github.com/ElementsProject/lightning/pull/4627
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04:27 < fiatjaf> rusty: so there is indeed an rpc call called "log"?
04:28 < fiatjaf> I can't call it from the CLI
04:28 < rusty> fiatjaf: technically not an RPC, it's a plugin command?
04:28 < rusty> ie. plugins can feed it over stdout to c-lightning.
04:28 < rusty> I misspoke before
04:30 < fiatjaf> but it works the same as an rpc call?
04:31 < fiatjaf> no, I must send it over stdout instead of through the rpc socket
04:31 < fiatjaf> is that it?
04:31 < fiatjaf> that thing is not in the docs, is it?
04:32 < fiatjaf> gijswijs: now I get what you mean
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05:48 < cdecker[m]> Probably not worth the effort, the logs take quite the long route to get to stdout but I don't know what to cut
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07:39 < fiatjaf> cdecker[m]: what do you mean? I don't get it
07:40 < fiatjaf> couldn't lightningd grab whatever is printed to stderr from plugins and use those as logs?
07:40 < fiatjaf> that was what I thought it was doing
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08:10 < cdecker[m]> Well, stderr is passthrough, so lightningd doesn't really do anything with it. The downside is that it also means that plugins share that resouce and may end up messing up each other's log lines
08:11 < cdecker[m]> Also, it'd save us the wrapping in JSON-RPC notification, but nothing else really. Plus accessing stdout on a console can be even slower than  the pipes we already use
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--- Log closed Fri Jul 02 00:00:54 2021