Re: [Qemu-devel] Qemu + RBD = ceph::buffer::end_of_buffer

[Sage Weil]

On Fri, 6 May 2011, Dyweni - Qemu-Devel wrote:
> Hi Josh/Lists!
> 
> 463             ::decode(*data_bl, iter);
> (gdb) print r
> $1 = 0
> (gdb) print data_bl
> $2 = (ceph::bufferlist *) 0x7f16f40d6060
> (gdb) print data_bl->_len
> $3 = 0

What about c->bl._len?

sage


> (gdb) print iter->off
> $4 = 20
> 
> 
> Thanks,
> Dyweni
> 
> 
> 
> > CCing the ceph list.
> >
> > On 05/06/2011 12:23 PM, Dyweni - Qemu-Devel wrote:
> >> Hi List!
> >>
> >> I upgraded Ceph to the latest development version
> >>    Commit: 0edbc75a5fe8c3028faf85546f3264d28653ea3f
> >>    Pulled from: git://ceph.newdream.net/ceph.git
> >>
> >> I recompiled the latest GIT version of QEMU-KVM (with Josh Durgin's
> >> patches) against the latest git version of Ceph.
> >>
> >> However, this error is still occurring:
> >>
> >> terminate called after throwing an instance of
> >> 'ceph::buffer::end_of_buffer'
> >>    what():  buffer::end_of_buffer
> >> Aborted (core dumped)
> >>
> >>
> >>
> >> Here's another backtrace from GDB:
> >>
> >> #0  0x00007f16ff829495 in raise (sig=<value optimized out>) at
> >> ../nptl/sysdeps/unix/sysv/linux/raise.c:64
> >> #1  0x00007f16ff82a81f in abort () at abort.c:92
> >> #2  0x00007f16fed74a25 in __gnu_cxx::__verbose_terminate_handler () at
> >> /usr/src/debug/sys-devel/gcc-4.4.5/gcc-4.4.5/libstdc++-v3/libsupc++/vterminate.cc:93
> >> #3  0x00007f16fed71c64 in __cxxabiv1::__terminate
> >> (handler=0x7f16fed74817
> >> <__gnu_cxx::__verbose_terminate_handler()>)
> >>      at
> >> /usr/src/debug/sys-devel/gcc-4.4.5/gcc-4.4.5/libstdc++-v3/libsupc++/eh_terminate.cc:38
> >> #4  0x00007f16fed71c8c in std::terminate () at
> >> /usr/src/debug/sys-devel/gcc-4.4.5/gcc-4.4.5/libstdc++-v3/libsupc++/eh_terminate.cc:48
> >> #5  0x00007f16fed71ea4 in __cxxabiv1::__cxa_throw (obj=0x1346470,
> >> tinfo=0x7f1701952ce0, dest=0x7f17017403d4
> >> <ceph::buffer::end_of_buffer::~end_of_buffer()>)
> >>      at
> >> /usr/src/debug/sys-devel/gcc-4.4.5/gcc-4.4.5/libstdc++-v3/libsupc++/eh_throw.cc:83
> >> #6  0x00007f1701740a7b in ceph::buffer::list::iterator::copy
> >> (this=0x7f16fd8b1930, len=4, dest=0x7f16fd8b18dc "") at
> >> include/buffer.h:379
> >> #7  0x00007f1701743328 in decode_raw<__le32>  (address@hidden, p=...)
> >> at
> >> include/encoding.h:35
> >> #8  0x00007f170174198a in decode (address@hidden, p=...) at
> >> include/encoding.h:80
> >> #9  0x00007f1701741ade in decode (s=..., p=...) at
> >> include/encoding.h:189
> >> #10 0x00007f17012e8369 in
> >> librados::RadosClient::C_aio_sparse_read_Ack::finish
> >> (this=0x7f16f40d6200,
> >> r=0) at librados.cc:463
> >> #11 0x00007f170132bb5a in Objecter::handle_osd_op_reply (this=0x13423e0,
> >> m=0x1346520) at osdc/Objecter.cc:794
> >> #12 0x00007f17012d1444 in librados::RadosClient::_dispatch
> >> (this=0x133f810, m=0x1346520) at librados.cc:751
> >> #13 0x00007f17012d1244 in librados::RadosClient::ms_dispatch
> >> (this=0x133f810, m=0x1346520) at librados.cc:717
> >> #14 0x00007f170131b57b in Messenger::ms_deliver_dispatch
> >> (this=0x1341910,
> >> m=0x1346520) at msg/Messenger.h:98
> >> #15 0x00007f17013090d3 in SimpleMessenger::dispatch_entry
> >> (this=0x1341910)
> >> at msg/SimpleMessenger.cc:352
> >> #16 0x00007f17012e296e in SimpleMessenger::DispatchThread::entry
> >> (this=0x1341da0) at msg/SimpleMessenger.h:533
> >> #17 0x00007f170131a39b in Thread::_entry_func (arg=0x1341da0) at
> >> common/Thread.h:41
> >> #18 0x00007f1701f6dac4 in start_thread (arg=<value optimized out>) at
> >> pthread_create.c:297
> >> #19 0x00007f16ff8c838d in clone () at
> >> ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
> >
> > I haven't seen that error before, but it's probably a bug in the OSD
> > where it doesn't set an error code. If you've still got the core file,
> > could you go to frame 10 and send us the values of r, bl._len, and
> > iter.off?
> >
> > Thanks,
> > Josh
> >
> 
> 
> 
>