Error: mydns, read_tcp_length: no data for fd

[Blinkiz]

I have these two errors in my daemon logfile on ISPConfig 3, Ubuntu 10.04:

Jun 24 13:33:29 websrv1 mydns[2963]: read_tcp_length: no data for fd 10: 94.127.32.20: Client closed TCP connection
Jun 24 13:30:01 websrv1 mydns[2963]: read_tcp_length: no data for fd 10: 127.0.0.1: Client closed TCP connection

It keeps repeating itself like every 5 minute or so. What does it mean?

[falko]

I'm not sure, but maybe it's the monitoring module that tries to find out if MyDNS is still running.

[Blinkiz]

Okay, so now am free to investigate this problem more.

The external address is one of our monitoring services. It just connected without asking anything and disconnected directly. This has now been fixed.

Still, am having this error left in the logs:

Jun 24 13:30:01 websrv1 mydns[2963]: read_tcp_length: no data for fd 10: 127.0.0.1: Client closed TCP connection

The above error message repeats itself every 10 minute, exactly. Like timestamps 12:10:01, 12:20:01, 12:30:01, 12:40:02 and so on.

So how can I solve this? Is this a bug in ISPConfig 3's monitoring service?

[till]

The message is ok. It is from the ispconfig monitoring system and not an error.

[Blinkiz]

Why not ask something when connecting from 127.0.0.1 and the message will go away from syslog?