DNS always down! Help

[leungwai@Pacific.net]

in article 9745hg$ip4 at pub3.rc.vix.com, Kevin Darcy at
kcd at daimlerchrysler.com wrote on 2/23/01 6:57 AM:

Everytime I found my DNS is not working, I cannot use nslookup / dig to make
any query and I try to check the status  " /etc/rc.d/init.d/named status " I
found some differences :
 
After "named" was down -- even I found named is still running (ps -e |grep
named)
/etc/rc.d/init.d/named status

ndc: error: ctl_client: evConnect(fd 3): Connection refused
ndc: error: cannot connect to command channel (/var/run/ndc)


When named can make query:
/etc/rc.d/init.d/named status

named 8.2.2-P5 Mon Feb 28 10:17:53 EST 2000
root at porky.devel.redhat.com:/usr/src/bs/BUILD/bind-8.2.2_P5/src/bin/named
number of zones allocated: 64
debug level: 0
xfers running: 0
xfers deferred: 0
soa queries in progress: 0
query logging is OFF
server is DONE priming
server IS NOT loading its configuration





> 
> leungwai at Pacific.net wrote:
> 
>> Any one Please help:
>> 
>> My DNS (Bind 8) always down, it can run normally one to two day, after that
>> I've checked the "named" status /etc/rc.d/init.d/named status  was not
>> running.
> 
> That must be a Linux thing. Talk to the Linux folks about how to interpret
> that result.
> 
>> But when I try ps -e to list the running processes, I can found
>> named.
> 
> Then named *is* running after all! I guess "/etc/rc2.d/init.d/named status"
> lied...
> 
>> Also, I found my server log as follows:
>> These messages repeat more than 2 hours....is there any problems here??
>> I'm using RedHat 6.2, the server running DNS, Sendmail, Apache and WU-Ftp
>> together.
>> 
>> Feb 19 17:45:35 ns1 inetd[491]: pid 718: exit status 1
>> Feb 19 18:08:39 ns1 named[505]: Cleaned cache of 0 RRsets
>> Feb 19 18:08:39 ns1 named[505]: USAGE 982577319 982559958 CPU=0.12u/0.05s
>> CHILDCPU=0u/0s
>> Feb 19 18:08:39 ns1 named[505]: NSTATS 982577319 982559958 A=7 PTR=72
>> Feb 19 18:08:39 ns1 named[505]: XSTATS 982577319 982559958 RR=14 RNXD=6
>> RFwdR=10 RDupR=0 RFail=0 RFErr=0 RErr=0 RAXFR=0$
>> Feb 19 19:08:39 ns1 named[505]: Cleaned cache of 2 RRsets
>> Feb 19 19:08:39 ns1 named[505]: USAGE 982580919 982559958 CPU=0.12u/0.05s
>> CHILDCPU=0u/0s
>> Feb 19 19:08:39 ns1 named[505]: NSTATS 982580919 982559958 A=7 PTR=76
>> Feb 19 19:08:39 ns1 named[505]: XSTATS 982580919 982559958 RR=14 RNXD=6
>> RFwdR=10 RDupR=0 RFail=0 RFErr=0 RErr=0 RAXFR=0$
>> Feb 19 20:08:39 ns1 named[505]: Cleaned cache of 0 RRsets
>> Feb 19 20:08:39 ns1 named[505]: USAGE 982584519 982559958 CPU=0.21u/0.05s
>> CHILDCPU=0u/0s
>> Feb 19 20:08:39 ns1 named[505]: NSTATS 982584519 982559958 A=15 PTR=87
>> Feb 19 20:08:39 ns1 named[505]: XSTATS 982584519 982559958 RR=58 RNXD=6
>> RFwdR=11 RDupR=0 RFail=0 RFErr=0 RErr=0 RAXFR=0$
>> Feb 19 21:08:39 ns1 named[505]: Cleaned cache of 0 RRsets
>> Feb 19 21:08:39 ns1 named[505]: USAGE 982588119 982559958 CPU=0.22u/0.05s
>> CHILDCPU=0u/0s
>> Feb 19 21:08:39 ns1 named[505]: NSTATS 982588119 982559958 A=15 PTR=88
>> Feb 19 21:08:39 ns1 named[505]: XSTATS 982588119 982559958 RR=61 RNXD=6
>> RFwdR=11 RDupR=0 RFail=0 RFErr=0 RErr=0 RAXFR=0$
>> Feb 19 22:08:39 ns1 named[505]: Cleaned cache of 0 RRsets
>> Feb 19 22:08:39 ns1 named[505]: USAGE 982591719 982559958 CPU=0.22u/0.05s
>> CHILDCPU=0u/0s
>> Feb 19 22:08:39 ns1 named[505]: NSTATS 982591719 982559958 A=15 PTR=88
>> Feb 19 22:08:39 ns1 named[505]: XSTATS 982591719 982559958 RR=61 RNXD=6
>> RFwdR=11 RDupR=0 RFail=0 RFErr=0 RErr=0 RAXFR=0$
>> Feb 19 23:08:39 ns1 named[505]: Cleaned cache of 0 RRsets
>> Feb 19 23:08:39 ns1 named[505]: USAGE 982595319 982559958 CPU=0.22u/0.05s
>> CHILDCPU=0u/0s
> 
> No problems there. The nameserver is answering queries, doing maintenance,
> consuming CPU, etc.
> 
> Is there actually a problem here? Or are you just putting WAY too much trust
> in Linux'es "/etc/rc.d/init.d/named status"?? Don't believe everything you
> read. (Including this :-)
> 
> 
> - Kevin
> 
> 
> 
>