general: error: socket.c:1577: unexpected error:

[Michael Hare]

I recently [8/1/2009] upgraded to 9.5.1P3.  Last evening there were two 
brief moments that the named process was not resolving out of cache. 
This is a recursive only server that is basically opened to all clients, 
mostly for historical reasons.  The named process recovered on its own.

While I have seen references to old bugs/issues
https://lists.isc.org/mailman/htdig/bind-users/2005-January/055224.html

This seems to be something different.  We're [still] on Red Hat 
Enterprise Linux AS release 3.  Any advice on what to investigate?

Thanks-
-Michael

Aug 17 01:24:53 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 01:24:53 named[20688]: general: error: internal_send: 
144.92.162.225#57060: Invalid argument
Aug 17 01:24:53 named[20688]: client: warning: client 
144.92.162.225#57060: error sending response: invalid file
Aug 17 01:24:53 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 01:24:53 named[20688]: general: error: internal_send: 
216.180.219.44#11059: Invalid argument
Aug 17 01:24:53 named[20688]: client: warning: client 
216.180.219.44#11059: error sending response: invalid file
...
...
Aug 17 01:25:17 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 01:25:17 named[20688]: general: error: internal_send: 
143.215.143.11#32833: Invalid argument
Aug 17 01:25:17 named[20688]: client: warning: client 
143.215.143.11#32833: error sending response: invalid file
Aug 17 01:25:17 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 01:25:17 named[20688]: general: error: internal_send: 
128.104.22.33#57369: Invalid argument
Aug 17 01:25:17 named[20688]: client: warning: client 
128.104.22.33#57369: error sending response: invalid file
Aug 17 01:25:57 named[20688]: general: warning: checkhints: unable to 
get root NS rrset from cache: not found



Aug 17 02:38:54 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 02:38:54 named[20688]: general: error: internal_send: 
144.92.166.12#9500: Invalid argument
Aug 17 02:38:54 named[20688]: client: warning: client 
144.92.166.12#9500: error sending response: invalid file
Aug 17 02:38:54 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 02:38:54 named[20688]: general: error: internal_send: 
144.92.166.12#14442: Invalid argument
Aug 17 02:38:54 named[20688]: client: warning: client 
144.92.166.12#14442: error sending response: invalid file
...
...
Aug 17 02:39:23 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 02:39:23 named[20688]: general: error: internal_send: 
202.108.181.80#50110: Invalid argument
Aug 17 02:39:23 named[20688]: client: warning: client 
202.108.181.80#50110: error sending response: invalid file
Aug 17 02:39:23 named[20688]: general: error: socket.c:1577: unexpected 
error:
Aug 17 02:39:23 named[20688]: general: error: internal_send: 
202.108.181.80#37064: Invalid argument
Aug 17 02:39:23 named[20688]: client: warning: client 
202.108.181.80#37064: error sending response: invalid file