What steps will reproduce the problem? unknown What do you see instead? Sep 02 07:02:12 s2sin56534f572120 warn No certificate provided by pubsub.beta.kontalk.net Sep 02 07:02:12 mod_s2s warn Forbidding insecure connection to/from pubsub.beta.kontalk.net Sep 02 07:02:13 general error Top-level error, please report: /usr/lib/prosody/net/server_select.lua:523: attempt to call upvalue 'dispatch' (a nil value) Sep 02 07:02:13 general error stack traceback: /usr/lib/prosody/net/server_select.lua:523: in function 'readbuffer' /usr/lib/prosody/net/server_select.lua:943: in function </usr/lib/prosody/net/server_select.lua:927> [C]: in function 'xpcall' /usr/lib/prosody/../../bin/prosody:80: in function 'loop' /usr/lib/prosody/../../bin/prosody:90: in main chunk [C]: ? What version of the product are you using? On what operating system? Prosody trunk nightly build 1136 (2019-09-01, 6c804b6b2ca2) on Debian Stretch Please provide any additional information below. pubsub.beta.kontalk.net does not exist in public internet, dunno whats going on there in general: https://forum.kontalk.org/t/expired-certificate-on-pubsub-beta-kontalk-net/685/2

Thanks for the report. I'm not entirely sure whether the s2s connection is directly related, more debug logs would help if you can catch this with debug logging enabled.

• tags Status-NeedInfo

This is what I could catch Sep 04 20:22:05 socket debug server.lua: auto-starting ssl negotiation... Sep 04 20:22:05 socket debug server.lua: attempting to start tls on tcp{client}: 0x55f010d93278 Sep 04 20:22:05 socket debug server.lua: accepted new client connection from IPV6-1:49688 to 5281 Sep 04 20:22:05 socket debug server.lua: ssl handshake done Sep 04 20:22:05 socket debug server.lua: closed client handler and removed socket from list Sep 04 20:22:06 general error Top-level error, please report: /usr/lib/prosody/net/server_select.lua:528: attempt to call upvalue 'dispatch' (a nil value) Sep 04 20:22:06 general error stack traceback: /usr/lib/prosody/net/server_select.lua:528: in function 'readbuffer' /usr/lib/prosody/net/server_select.lua:948: in function </usr/lib/prosody/net/server_select.lua:932> [C]: in function 'xpcall' /usr/lib/prosody/../../bin/prosody:80: in function 'loop' /usr/lib/prosody/../../bin/prosody:90: in main chunk [C]: ? Sep 04 20:22:06 socket debug server.lua: client IPV6-2:clientport read error: closed Sep 04 20:22:06 net.connect debug [pending connection i5sHRKm-] Connection attempt failed: closed Sep 04 20:22:06 net.connect debug [pending connection i5sHRKm-] Checking for targets... Sep 04 20:22:06 net.connect debug [pending connection i5sHRKm-] No more connection targets to try Sep 04 20:22:06 s2sout55f00f870ca0 debug s2s connection attempt failed: closed Sep 04 20:22:06 s2sout55f00f870ca0 debug s2s disconnected: snopyta.org->chinwag.im (closed) Sep 04 20:22:06 s2sout55f00f870ca0 debug Destroying outgoing session snopyta.org->chinwag.im: closed Sep 04 20:22:06 s2sout55f00f870ca0 info Sending error replies for 2 queued stanzas because of failed outgoing connection to chinwag.im Sep 04 20:22:06 stanzarouter debug Received[s2sin]: <iq id='xx' type='error' to='x@snopyta.org/a' from='x@chinwag.im'> Sep 04 20:22:06 c2s55f0135836a0 debug Sending[c2s]: <iq id='xx' type='error' to='x@snopyta.org/a' from='x@chinwag.im'> Sep 04 20:22:06 stanzarouter debug Received[s2sin]: <iq id='xx' type='error' to='x@snopyta.org/a' from='x2@chinwag.im'> Sep 04 20:22:06 c2s55f0135836a0 debug Sending[c2s]: <iq id='xx' type='error' to='x@snopyta.org/a' from='x2@chinwag.im'> Sep 04 20:22:06 socket debug server.lua: closed client handler and removed socket from list Sep 04 20:22:06 socket debug server.lua: found no handler and closed socket (writelist)

#1456 is a duplicate of this issue.

I believe this comes from net.connect not having an 'onincoming' listener callback, but it shouldn't need to because it replaces the listeners on connect.

• tags Milestone-0.12 Component-Network

server_select connection attempt to example.org (literally that) results in this (extended tracebacks enabled): Dec 01 19:31:36 general error Top-level error, please report: ./net/server_select.lua:528: attempt to call a nil value (upvalue 'dispatch') Dec 01 19:31:36 general error stack traceback: v--------------------- ./util/debug.lua ----------------------v >(0) [Lua] ./util/debug.lua line 143 in (defined on line 121) Locals: { thread = thread: 0x5567d22d7268, start_level = 2, levels = table: 0x5567d2852510, level = 2, info = table: 0x5567d2852550 } Upvals: { _ENV = table: 0x5567d22d7b80, get_traceback_table = function(debug.lua:93), getstring = function(termcolours.lua:56), styles = table: 0x5567d230f940, build_source_boundary_marker = function(debug.lua:114), string_from_var_table = function(debug.lua:57), optimal_line_length = 65 } v-------------------------- C code ---------------------------v (1) [ C ] global C function "pcall" Locals: { thread = thread: 0x5567d22d7268, message = "\ ", level = 2 } v--------------------- ./util/debug.lua ----------------------v (2) [Lua] ./util/debug.lua line 195 in field "traceback" (defined on line 194) Upvals: { _ENV = table: 0x5567d22d7b80, _traceback = function(debug.lua:121) } v------------------------- ./prosody -------------------------v (3) [Lua] ./prosody line 69 in upvalue "dispatch" (defined on line 63) Upvals: { _ENV = table: 0x5567d22d7b80 } v------------------ ./net/server_select.lua ------------------v (4) [Lua] ./net/server_select.lua line 528 in field "readbuffer" (defined on line 514) Locals: { err = "./net/server_select.lua:528: attempt to call a nil value (upv… } Upvals: { receive = function([C]:-1), socket = tcp{client}: 0x5567d283aae8, pattern = "*a", maxreadlen = 25600000, handler = table: 0x5567d2839d20, STAT_UNIT = 1, readtraffic = 0, _readtraffic = 250, _readtimes = table: 0x5567d23f3dd0, _currenttime = 1575225096.8625, dispatch = nil, out_put = function(server_select.lua:15), tostring = function([C]:-1), ip = "93.184.216.34", clientport = "clientport", _ = nil } (5) [Lua] ./net/server_select.lua line 948 in (defined on line 932) Locals: { buffer = nil, err = "timeout", part = "", buffer = "", len = 0, count = 0 } Upvals: { quitting = nil, _currenttime = 1575225096.8625, luasocket_gettime = function([C]:-1), math_huge = inf, _timerlistlen = 1, _timerlist = table: 0x5567d23f3d50, math_min = function([C]:-1), socket_select = function([C]:-1), _readlist = table: 0x5567d23f3cd0, _sendlist = table: 0x5567d23f3d10, _selecttimeout = 1, ipairs = function([C]:-1), _socketlist = table: 0x5567d23f3d90, closesocket = function(server_select.lua:726), out_put = function(server_select.lua:15), pairs = function([C]:-1), _closelist = table: 0x5567d240b530, _starttime = 1575225067.9047, _checkinterval = 30, _writetimes = table: 0x5567d2400970, _sendtimeout = 60000, _readtimes = table: 0x5567d23f3dd0, _readtimeout = 840, _fullservers = table: 0x5567d240b420, _accepretry = 10, closeall = function(server_select.lua:820) } v-------------------------- C code ---------------------------v (6) [ C ] global C function "xpcall" Locals: { once = nil, next_timer_time = 57.997311115265, read = table: 0x5567d2851f80, write = table: 0x5567d2851ff0, err = nil, _ = 1, socket = tcp{client}: 0x5567d283aae8, handler = table: 0x5567d2839d20 } v------------------------- ./prosody -------------------------v (7) [Lua] ./prosody line 80 in local function "loop" (defined on line 61) Upvals: { _ENV = table: 0x5567d22d7b80 } (8) [Lua] ./prosody line 90 Locals: { catch_uncaught_error = function(prosody:63), sleep = function([C]:-1), server = table: 0x5567d240d1c0 } Upvals: { _ENV = table: 0x5567d22d7b80 } v-------------------------- C code ---------------------------v (9) [ C ] C function (unknown name) Locals: { is_relative = function(prosody:21), startup = table: 0x5567d22df6c0, async = table: 0x5567d2390930, thread = table: 0x5567d2390e00, loop = function(prosody:61), cleanup = function(prosody:85) }

After some testing it looks like server_select calls the callbacks in the weirdest order: onincoming("") -- yes, the empty string, yes, before onconnect onconnect() ondrain() ondisconnect("closed") See #528 As a workaround, use libevent or server_epoll.

• tags Status-Accepted