pfSense

I am running:
2.1-RC1 (i386)
built on Sun Sep 1 01:17:51 EDT 2013
FreeBSD 8.3-RELEASE-p10

1. dhcpleases automatically entered
   10.49.80.214 android-92ef1893ad40d810.np.net.inf.org android-92ef1893ad40d810 # dynamic entry from dhcpd.leases@

What pfSense version are you on?
How do you make the problem happen?
Post the corrupted/truncated /etc/hosts.

What pfSense version are you on?

Like in issue description: 2.1-RC1 (amd64) built on Tue Aug 27 16:56:42

How do you make the problem happen?

It just happens. When Register DHCP leases in DNS forwarder is on. Otherwise it does not happen.

Post the corrupted/truncated /etc/hosts.

vi /etc/hosts
127.0.0.1       localhost 
10.10.0.1       xxx
192.168.1.9     xxx
192.168.1.6     xxx
192.168.1.11    xxx
192.168.1.13   xxx
192.168.2.32   xxx
192.168.1.22    xxx
10.168^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
# dhcpleases automatically entered
10.10.255.239  xxx           # dynamic entry from dhcpd.leases
10.10.255.173   xxx         # dynamic entry from dhcpd.leases
...
...

Cant reproduce the problem anymore. When i disabled the "DHCP leases in DNS forwarder" my problem was gone but after reenabling it the problem does not come back.

1. Disabled "Register DHCP leases in DNS forwarder"
2. Verified /var/etc/hosts looked correct. I still had the DHCP-lease hosts in it. and truncated information above "# dhcpleases automatically entered"
3. Restarted dnsmasq
4. Verified /var/etc/hosts file looked correct. It was good.
5. Enabled "Register DHCP leases in DNS forwarder"
6. Verified /var/etc/hosts looked correct. It was still good.

I'm seeing this too (on 2.0). While the corruption is happening, there are two /usr/local/sbin/dhcpleases processes running:

28599  ??  Is     0:00.01 /usr/local/sbin/dhcpleases -l /var/dhcpd/var/db/dhcpd.leases -d office.adelard.com -p /var/run/dnsmasq.pid -h /var/etc/hosts
30002  ??  S      0:00.10 /usr/local/sbin/dnsmasq --local-ttl 1 --all-servers --rebind-localhost-ok --stop-dns-rebind --dns-forward-max=5000 --cache-size=10000 --dhcp-hostsfile=/var/etc/hosts
32398  ??  Is     0:07.55 /usr/local/sbin/dhcpleases -l /var/dhcpd/var/db/dhcpd.leases -d office.adelard.com -p /var/run/dnsmasq.pid -h /var/etc/hosts
34697  ??  Ss     0:00.01 /usr/local/sbin/dhcpd -user dhcpd -group _dhcp -chroot /var/dhcpd -cf /etc/dhcpd.conf em0 em3

[2.0.3-RELEASE][admin@pfsense.office.adelard.com]/var/etc(39): ps xawww|grep dhcp
 9351  ??  Ss     0:00.06 /usr/local/sbin/dhcpd -user dhcpd -group _dhcp -chroot /var/dhcpd -cf /etc/dhcpd.conf em0 em3
23543  ??  Ss     8:55.92 /usr/sbin/syslogd -s -c -c -l /var/dhcpd/var/run/log -f /var/etc/syslog.conf
32398  ??  Is     0:07.56 /usr/local/sbin/dhcpleases -l /var/dhcpd/var/db/dhcpd.leases -d office.adelard.com -p /var/run/dnsmasq.pid -h /var/etc/hosts

12040  ??  Ss     0:00.01 /usr/local/sbin/dhcpleases -l /var/dhcpd/var/db/dhcpd.leases -d office.adelard.com -p /var/run/dnsmasq.pid -h /var/etc/hosts
13517  ??  S      0:00.02 /usr/local/sbin/dnsmasq --local-ttl 1 --all-servers --rebind-localhost-ok --stop-dns-rebind --dns-forward-max=5000 --cache-size=10000 --dhcp-hostsfile=/var/etc/hosts
16904  ??  Ss     0:00.00 /usr/local/sbin/dhcpd -user dhcpd -group _dhcp -chroot /var/dhcpd -cf /etc/dhcpd.conf em0 em3
23543  ??  Ss     8:55.93 /usr/sbin/syslogd -s -c -c -l /var/dhcpd/var/run/log -f /var/etc/syslog.conf

Sorry, I don't have much to add as far as content, but I would like to say that my pfSense box has had the same behavior as everyone else in this thread. Specifically I was trying to resolve a static DHCP entry which was inserted into DNS using the checkbox in the DNS forwarder page, and it was never entered into the hosts file, and sometimes while trying to fix other hosts it would corrupt the file with the ^@ stuff that other people have had in here.
Here's my basic box info:

@
Version 2.1-RELEASE (amd64)
built on Wed Sep 11 18:17:48 EDT 2013
FreeBSD 8.3-RELEASE-p11

You are on the latest version.
Platform pfSense
CPU Type Intel(R) Xeon(TM) CPU 3.20GHz
4 CPUs: 2 package(s) x 1 core(s) x 2 HTT threads
Uptime 57 Days 21 Hours 22 Minutes 29 Seconds
@

Thanks for your hard work!

I am unfamiliar with this forum so I apologize for my messed up formatting.

think this may be related to some edge case where dhcpleases runs multiple times, though I'm not seeing how that could happen, and launching multiple instances on 2.2.4 doesn't make it happen. Granted, I'm looking at 2.2.4 and 2.3, could have been fixed since then.

anyone still encountering this?

Yeah, this is fixed in the last version of dhcpleases.

Just had something that looks exactly like this happen in 2.4.4-RELEASE-p3 with my overrides list truncated in the middle of an entry (still using the dnsmasq DNS forwarder). Unfortunately, I didn't check to see if there were any duplicate processes before I tried changing configuration to try fixing it (I removed the truncated host override in the GUI and re-added it, thinking maybe there was a configuration error). However, I am getting the duplicate "dhcpleases automatically entered" sections as reported by some. The first copy doesn't seem to update with added or removed leases until the DNS forwarder is restarted, as it only has a copy of the entries from the time it was restarted.

It's possible the truncation is a result of either a race condition or just simply being confused by the duplicate entries as it adds or removes entries.