#1056 /usr/lib/prosody/net/dns.lua:676: table index is nil

Reporter Peer Heinlein
Owner Zash
Created
Updated
Stars ★ (1)  
Tags
  • Status-Fixed
  • Type-Defect
  • Milestone-0.10
  • Priority-Medium
  1. Peer Heinlein on

    We're seeing some errors in our log we should report: Dec 10 07:31:29 general error Top-level error, please report: /usr/lib/prosody/net/dns.lua:676: table index is nil Dec 10 07:31:29 general error stack traceback: [C]: in function 'loop' /usr/lib/prosody/net/server_event.lua:751: in function </usr/lib/prosody/net/server_event.lua:750> [C]: in function 'xpcall' /usr/bin/prosody:400: in function 'loop' /usr/bin/prosody:431: in main chunk [C]: ? Dec 10 07:31:29 general error Top-level error, please report: /usr/lib/prosody/net/dns.lua:676: table index is nil Dec 10 07:31:29 general error stack traceback: [C]: in function 'loop' /usr/lib/prosody/net/server_event.lua:751: in function </usr/lib/prosody/net/server_event.lua:750> [C]: in function 'xpcall' /usr/bin/prosody:400: in function 'loop' /usr/bin/prosody:431: in main chunk [C]: ? root@xmpp:~# prosodyctl about Prosody 0.10 nightly build 447 (2017-11-18, 5edb0d01a94f) # Prosody directories Data directory: /var/lib/prosody Config directory: /etc/prosody Source directory: /usr/lib/prosody Plugin directories: /usr/lib/prosody/prosody-community-modules - prosody-modules rev: 668447566edf /usr/lib/prosody/modules /usr/lib/prosody/modules/ # Lua environment Lua version: Lua 5.1 Lua module search paths: /usr/lib/prosody/?.lua /usr/local/share/lua/5.1/?.lua /usr/local/share/lua/5.1/?/init.lua /usr/local/lib/lua/5.1/?.lua /usr/local/lib/lua/5.1/?/init.lua /usr/share/lua/5.1/?.lua /usr/share/lua/5.1/?/init.lua Lua C module search paths: /usr/lib/prosody/?.so /usr/local/lib/lua/5.1/?.so /usr/lib/x86_64-linux-gnu/lua/5.1/?.so /usr/lib/lua/5.1/?.so /usr/local/lib/lua/5.1/loadall.so LuaRocks: Not installed # Lua module versions lfs: LuaFileSystem 1.6.2 libevent: 2.0.21-stable luaevent: 0.4.4 lxp: LuaExpat 1.3.0 socket: LuaSocket 3.0-rc1 ssl: 0.5.PR

  2. Zash on

    Thanks for the report. It looked familiar, and I spotted #976, so this is technically a duplicate. Do you have any debug logs leading up to this?

    Changes
    • tags Status-NeedInfo
    • owner Zash
  3. sven on

    Hi, the debug log doesn't show more informations about that issue :( below are the latest details Apr 26 23:47:06 adns debug Sending DNS query to 195.10.208.2 Apr 26 23:47:06 adns debug Sending DNS query to 195.10.208.2 Apr 26 23:47:06 socket debug new connection established. id: 1c96de10 Apr 26 23:47:06 general error Top-level error, please report: /usr/lib/prosody/net/dns.lua:676: table index is nil Apr 26 23:47:06 general error stack traceback: [C]: in function 'loop' /usr/lib/prosody/net/server_event.lua:751: in function </usr/lib/prosody/net/server_event.lua:750> [C]: in function 'xpcall' /usr/bin/prosody:400: in function 'loop' /usr/bin/prosody:431: in main chunk [C]: ? Apr 26 23:47:06 general error Top-level error, please report: /usr/lib/prosody/net/dns.lua:676: table index is nil Apr 26 23:47:06 general error stack traceback: [C]: in function 'loop' /usr/lib/prosody/net/server_event.lua:751: in function </usr/lib/prosody/net/server_event.lua:750> [C]: in function 'xpcall' /usr/bin/prosody:400: in function 'loop' /usr/bin/prosody:431: in main chunk [C]: ? prosodyctl about Prosody 0.10 nightly build 455 (2017-12-11, 384658c7a26a) # Prosody directories Data directory: /var/lib/prosody Config directory: /etc/prosody Source directory: /usr/lib/prosody Plugin directories: /usr/lib/prosody/prosody-community-modules - prosody-modules rev: 902ecd6400bd /usr/lib/prosody/modules /usr/lib/prosody/modules/ # Lua environment Lua version: Lua 5.1 Lua module search paths: /usr/lib/prosody/?.lua /usr/local/share/lua/5.1/?.lua /usr/local/share/lua/5.1/?/init.lua /usr/local/lib/lua/5.1/?.lua /usr/local/lib/lua/5.1/?/init.lua /usr/share/lua/5.1/?.lua /usr/share/lua/5.1/?/init.lua Lua C module search paths: /usr/lib/prosody/?.so /usr/local/lib/lua/5.1/?.so /usr/lib/x86_64-linux-gnu/lua/5.1/?.so /usr/lib/lua/5.1/?.so /usr/local/lib/lua/5.1/loadall.so LuaRocks: Not installed # Lua module versions lfs: LuaFileSystem 1.6.2 libevent: 2.0.21-stable luaevent: 0.4.4 lxp: LuaExpat 1.3.0 socket: LuaSocket 3.0-rc1 ssl: 0.5.PR

  4. Zash on

    Thanks. "new connection established" is a hint at least, but lua-/libevent throws away the real traceback, obscuring the issue. The error happens when inserting DNS response records into the cache. A packet capture of the response would be helpful.

  5. Zash on

    I have discovered that this error can happen if the DNS library tries to cache/remember a record that it does not support, or which lacks decoded data. In my case it happened because of a TLSA record. The weird thing is that these should not normally be cached, so I'm still interested in packet captures that can reproduce what you've seen.

    Changes
    • tags Status-Started Milestone-0.10
  6. Zash on

    The error is also in #819 suggesting that this happens with DNAMEs

  7. Zash on

    Fixed in https://hg.prosody.im/0.10/rev/fcf42bd7d067 Please test the fix.

    Changes
    • tags Status-Fixed

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