mpd5: Cannot get tee node id: No error: 0 ???

[Aleksandr]

Hi!
I have troubles with mpd, sometimes it works many days without problems, but some day it stop working with that error:

Cannot get tee node id: No error: 0

full log output is:

Mar 17 10:19:20 srv mpd: [L-PPTP] LCP: SendTerminateReq #4
Mar 17 10:19:22 srv mpd: [L-PPTP] LCP: state change Stopping --> Stopped
Mar 17 10:19:22 srv mpd: [L-PPTP] LCP: LayerFinish
Mar 17 10:19:39 srv mpd: [L-PPTP] PPTP call terminated
Mar 17 10:19:39 srv mpd: [L-PPTP] Link: DOWN event
Mar 17 10:19:39 srv mpd: [L-PPTP] LCP: Down event
Mar 17 10:19:39 srv mpd: [L-PPTP] LCP: state change Stopped --> Starting
Mar 17 10:19:39 srv mpd: [L-PPTP] LCP: LayerStart
Mar 17 10:19:39 srv mpd: [L-PPTP] Cannot get tee node id: No error: 0
Mar 17 10:19:39 srv mpd: [L-PPTP] Link: reconnection attempt 1 in 7 seconds
Mar 17 10:19:46 srv mpd: [L-PPTP] Link: reconnection attempt 1
Mar 17 10:19:46 srv mpd: [L-PPTP] PPTP call successful
Mar 17 10:19:46 srv mpd: [L-PPTP] PPTP: can't attach pptpgre node: No such file or directory
Mar 17 10:19:46 srv mpd: [L-PPTP] PPTP call failed
Mar 17 10:19:46 srv mpd: [L-PPTP] Link: DOWN event
Mar 17 10:19:46 srv mpd: [L-PPTP] LCP: Down event

this trouble solves only after restarting mpd.

This server serve only two (2) mpd links.

pptp config is:

pptp1:
        create bundle static B-PPTP
        #set iface route a.b.c.d
        set iface route 216.239.47.126
        set iface route 8.8.4.4
        set iface route default
        set iface enable tcpmssfix
        set iface enable nat
        set nat red-port udp 0.0.0.0 20402 192.168.1.20 20402
        set nat red-port tcp 0.0.0.0 20402 192.168.1.20 20402
        set iface up-script /usr/local/etc/mpd5/1_up.sh
        set iface down-script /usr/local/etc/mpd5/1_down.sh
        set ipcp ranges 0.0.0.0/0 0.0.0.0/0
        create link static L-PPTP pptp
        set link action bundle B-PPTP
        set auth authname xxxxxx
        set auth password xxxxx
        set link eap yes md5
        set link max-redial 0
        set link mtu 1400
        set link keep-alive 10 20
        set link disable multilink
        set link redial-delay 5
        set pptp peer xxxxxxx
        set pptp disable windowing
        open

FreeBSD version:

9.1-STABLE FreeBSD 9.1-STABLE #1 r247004

[Dmitry S. Lukhtionov]

This is not mpd problem. This is problem inside netgraph.
Only one way to resolve this problem - reboot server.

Type "vmstat -z | grep NetGraph" and look in last column.
If you found nonzero values, try to increase "net.graph.maxdata" and "net.graph.maxalloc" sysctl variables.

[Aleksandr]

The output is:

# vmstat -z | grep -E "(NetGraph|^ITEM)"
ITEM                   SIZE  LIMIT     USED     FREE      REQ FAIL SLEEP
NetGraph items:          72,   4118,       0,     377,  127712,   0,   0
NetGraph data items:     72,    522,       0,     435,23721530,   0,   0

There only two mpd interfaces ng0,ng1 and nothing else what use netgraph.

[Aleksandr]

And restarting mpd (not reboot) helps for another 3-7 days.

[Aleksandr]

Dear community, can anybody help me?

[Dmitry S. Lukhtionov]

This is netgraph problem. You must reboot server, to fix it.

[Aleksandr]

Dear Dmitry, thank you.

But this problem happens in random time. Sometime this server works 2-3 weeks with no problems, sometime this happens 2 times per week. But restarting only mpd helps. Users say that 2 routers with pppoe+pptp links works much stable :-(

How can I make this server with mpd much stable?

[Dmitriy Zamuraev]

What about to remove this lines from mpd.conf and use another nat mechanism?
set nat red-port udp 0.0.0.0 20402 192.168.1.20 20402
set nat red-port tcp 0.0.0.0 20402 192.168.1.20 20402
set iface enable nat
Just verify, other config lines looks like good for me

What in this scripts?
set iface up-script /usr/local/etc/mpd5/1_up.sh
set iface down-script /usr/local/etc/mpd5/1_down.sh