View source for Addr 0.0.0.0: hostname lookup failed

{{Troubleshooting Header}}
=Problem=
{{man|8|amandad}} fails with error 
 addr 0.0.0.0: hostname lookup failed
The {{man|8|amdump}} and {{man|8|amcheck}} commands may display this error.

=Solution=

Check the amandad debug logs on the client. For example: ''/tmp/amanda/amandad.<Datestamp>''. Example of log messages: 
 amandad: time 0.000: dgram_send_addr: sendto(0.0.0.0.566) failed:
 Invalid argument
 amandad: time 0.003: sending REP packet:
 ----
 Amanda 2.4 REP HANDLE 001-A8850608 SEQ 1152114891
 ERROR [addr 0.0.0.0: hostname lookup failed]

One of the possible reasons can be using inetd in IPv6 environment on a linux system.  If this is the case, then
* use xinetd instead of inetd services; and
* set protocol field to ''tcp46'' in xinetd or inetd service entry. See also [[How To:Run Amanda Over IPv6]].