[Nfd-dev] [Operators] "No buffer space available"

[Davide Pesavento]

On Tue, Sep 5, 2017 at 7:57 PM, Dehart, John <jdd at wustl.edu> wrote:
>
>> On Sep 5, 2017, at 11:36 AM, Davide Pesavento <davide.pesavento at lip6.fr> wrote:
>>
>> On Tue, Sep 5, 2017 at 5:23 PM, Dehart, John <jdd at wustl.edu> wrote:
>>>
>>> nfd.log file has not been touched in 11 hours:
>>
>> So nfd is up but not doing anything meaningful? Can you run strace -p
>> on the stuck nfd?
>
> Too late. I restarted with my updates to change to DEBUG and capture log files.
> Yes, it was stuck and not responding to anything. Did attach to it with gdb
> to see if that would tell me anything but not sure this really tells us anything:
>
> (gdb) bt
> #0  malloc_consolidate (av=av at entry=0x7f6a6de53760 <main_arena>) at malloc.c:4165
> #1  0x00007f6a6db1072d in _int_free (av=0x7f6a6de53760 <main_arena>, p=<optimized out>, have_lock=0) at malloc.c:4059
> #2  0x00007f6a6f50baf7 in std::_Sp_counted_ptr<ndn::Buffer*, (__gnu_cxx::_Lock_policy)2>::_M_dispose() () from /usr/lib/x86_64-linux-gnu/libndn-cxx.so.0.5.1
> #3  0x000000000045b639 in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() ()
> #4  0x0000000000472e44 in ?? ()
> #5  0x000000000047c267 in ?? ()
> #6  0x000000000047c393 in ?? ()
> #7  0x000000000047a567 in ?? ()
> #8  0x000000000044eff4 in boost::asio::detail::task_io_service::run(boost::system::error_code&) ()
> #9  0x0000000000450576 in ?? ()
> #10 0x00000000004363ff in ?? ()
> #11 0x00007f6a6dab2f45 in __libc_start_main (main=0x436060, argc=3, argv=0x7ffff81bf138, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff81bf128) at libc-start.c:287
> #12 0x0000000000449399 in ?? ()
> (gdb)
>
> When I see it again, I will try strace.

Thanks. A proper gdb backtrace could be useful too, but the above is
not. To make it more useful you need to install the debug symbols for
ndn-cxx and nfd.

When nfd was stuck, do you know if CPU consumption was at or close to 100%?

Thanks,
Davide