Memcached (1.1.12) Hanging in itmes.c:153

[Steven Grimm]

It doesn't make any sense that it'd actually hang there. There's a loop 
in process_command, but given the arguments I see are getting passed 
into that function, I don't see any way that would loop either.

Is this something you can catch in the act, or is your stack trace from 
a core file? If you're catching it live, I'd be very interested in 
seeing what it looks like if you single-step through the code, stepping 
until it gets back to wherever you interrupted it (assuming there's an 
infinite loop going on here). Looking at the 1.1.12 code I don't see how 
it could get stuck but obviously it can since you're seeing it!

This is not something we have ever seen on any version of memcached to 
my knowledge.

-Steve


Dean Michael C. Berris wrote:
> Hi Everyone,
>
> I've attached the backtrace of the part where the memcached instance is
> hanging, which has been encountered by a previous poster
> (http://tinyurl.com/2da8nk).
>
> #0  0x0804bfa5 in item_unlink_q (it=0x40e9bd08) at items.c:153
> #1  0x0804c470 in item_unlink (it=0x40e9bd08) at items.c:180
> #2  0x0804ae43 in process_command (c=0x808e9b8,
>     command=0x809d8f0 "get 38004118") at memcached.c:628
> #3  0x0804b143 in try_read_command (c=0x808e9b8) at memcached.c:770
> #4  0x0804b42e in drive_machine (c=0x808e9b8) at memcached.c:870
> #5  0x0804b8eb in event_handler (fd=12, which=2, arg=0x808e9b8)
>     at memcached.c:1112
> #6  0x40026b34 in event_process_active (base=0x808ad60) at event.c:256
> #7  0x40026d9a in event_base_loop (base=0x808ad60, flags=0) at
> event.c:370
> #8  0x40026c23 in event_loop (flags=0) at event.c:305
> #9  0x08049f6d in main (argc=12, argv=0xbfffde34) at memcached.c:1543
>
> I'd like to ask whether this is already considered a known issue with
> 1.1.12, and whether this has been fixed in a later release. I've been
> looking at the Changes for 1.2.1, and I haven't seen anything relating
> to this issue.
>
> Advice and insights would be most appreciated.
>
> --
> Dean Michael Berris
> <dmberris at friendster.com>
> Mobile: +639287291459
> YMID: mikhailberis
>
>