[Bug 186114] net/mpd5 hangs after a certain number of users connect

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=186114

--- Comment #104 from Cassiano Peixoto <peixoto.cassiano at gmail.com> ---
Hi,

It wasn't zombie, it looks like zombie because the kind of behavior. See
process top output below:

 PID USERNAME       THR PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
 1295 root            30  73    0   327M   147M CPU3  3  627:10   101.55% mpd5

Pay attention to WCPU, it's too high.

I never ran mpd5 in detached mode, but if you need it, i can.

Regarding logs, there is nothing relevant in mpd5 logs, but in kernel logs i
have:

Jul  5 11:59:59 B-ras kernel: Accessing freed hook: name l4658, 0 refs, Last
touched:
Jul  5 11:59:59 B-ras kernel: Last active @ /usr/src/sys/netgraph/ng_base.c,
line 1196
Jul  5 11:59:59 B-ras kernel: problem discovered at file
/usr/src/sys/netgraph/ng_base.c, line 1131
Jul  5 11:59:59 B-ras kernel: KDB: stack backtrace:
Jul  5 11:59:59 B-ras kernel: #0 0xffffffff80aa4ad7 at kdb_backtrace+0x67
Jul  5 11:59:59 B-ras kernel: #1 0xffffffff80bb2acc at ng_findhook+0xac
Jul  5 11:59:59 B-ras kernel: #2 0xffffffff80bb96bc at ng_con_nodes+0x2c
Jul  5 11:59:59 B-ras kernel: #3 0xffffffff80bb4e70 at ng_apply_item+0xa90
Jul  5 11:59:59 B-ras kernel: #4 0xffffffff80bb413b at ng_snd_item+0x1db
Jul  5 11:59:59 B-ras kernel: #5 0xffffffff82451469 at ngc_send+0x209
Jul  5 11:59:59 B-ras kernel: #6 0xffffffff80aea8ec at sosend_generic+0x4ec
Jul  5 11:59:59 B-ras kernel: #7 0xffffffff80af11c1 at kern_sendit+0x291
Jul  5 11:59:59 B-ras kernel: #8 0xffffffff80af1523 at sendit+0x1a3
Jul  5 11:59:59 B-ras kernel: #9 0xffffffff80af136d at sys_sendto+0x4d
Jul  5 11:59:59 B-ras kernel: #10 0xffffffff80e36394 at amd64_syscall+0x6c4
Jul  5 12:00:00 B-ras kernel: #11 0xffffffff80e194eb at Xfast_syscall+0xfb

Remember, i was using web status to collect info, i'll disable it, maybe it
could be the problem, don't you think?

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