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Libevent errors with running Tor on a virtual server



Hi,
I'm running an entry-node on a virtual-server. I have usually a
throughput of 200-400 GB each day and it runs fine so far. My problem
is that my tor-logs are spammed with these messages:
..
Aug 07 09:39:57.440 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 09:45:25.996 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 09:50:25.213 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 09:55:26.592 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:08:33.343 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:16:00.721 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:21:27.403 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:26:35.141 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:31:35.452 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:38:19.442 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:44:33.383 [warn] Failing because we have 994 connections
already. Please raise your ulimit -n. 
Aug 07 10:46:05.720 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 10:52:35.242 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 13:05:43.256 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 13:12:24.525 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory 
Aug 07 13:57:00.948 [warn] Error from libevent setting read event state
for 1023 to watched: No such file or directory ..


Here are some informations about my server:

$ ulimit -H -n     
1024
$ cat /proc/user_beancounters
Version:
2.5 uid  resource                     held
maxheld              barrier                limit              failcnt
33209: kmemsize                  3380633
3415768             79691776             88080384                    0
lockedpages                     0                    0
3584                 3584                    0
privvmpages                 21901                22100
551680               559872                    0
shmpages                      640                  640
131072               131072                    0
dummy                           0
0                    0                    0                    0
numproc                        10                   10
1536                 1536                    0
physpages                   16377
16437                    0  9223372036854775807                    0
vmguarpages                     0                    0
142080  9223372036854775807                    0
oomguarpages                16377                16437
142080  9223372036854775807                    0
numtcpsock                    994                  996
1792                 1792                    0
numflock                        2                    2
1000                 1100                    0
numpty                          1
1                   64                   64                    0
numsiginfo                      0                    0
1024                 1024                    0
tcpsndbuf                 3744392              4346800
16777216             25165824                    0
tcprcvbuf                 2096520              2165928
16777216             25165824                  151
othersockbuf                14064                15384
8388608             15728640                    0
dgramrcvbuf                     0                 8488
8388608              8388608                    0
numothersock                   11                   13
1792                 1792                    0
dcachesize                1092906              1108890
16777216             17301504                    0
numfile                      1538                 1538
16384                16384                    0
numiptent                      14 14                  256
256                    0


On the server runs nothing except tor and a ssh-server so all rescources
are used by tor. I think the problem is with the tcprcvbuf because it
has a failcount of 151. But I don't know what to do now. How do I stop
these messages/problems with my node? What limits should I set in my
torrc? Raising tcprcvbuf is not possible for me. Shall I reduce the
ConnLimit or the ConstrainedSockSize? What would you advice me?

cu

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