Ceph

One of the failures in #3459 was due to testrados_watch_notify crashing:

#0  0x00007fa9efc199ec in Objecter::scan_requests (this=0xdaef80, skipped_map=false, need_resend=..., need_resend_linger=...) at osdc/Objecter.cc:445
#1  0x00007fa9efc1a9e8 in Objecter::handle_osd_map (this=0xdaef80, m=0x7fa9e0000bf0) at osdc/Objecter.cc:528
#2  0x00007fa9efbf8a0e in librados::RadosClient::_dispatch (this=0xda9b30, m=0x7fa9e0000bf0) at librados/RadosClient.cc:313
#3  0x00007fa9efbf87df in librados::RadosClient::ms_dispatch (this=0xda9b30, m=0x7fa9e0000bf0) at librados/RadosClient.cc:280
#4  0x00007fa9efd25fe7 in Messenger::ms_deliver_dispatch (this=0xdae1b0, m=0x7fa9e0000bf0) at msg/Messenger.h:549
#5  0x00007fa9efd256f5 in DispatchQueue::entry (this=0xdae298) at msg/DispatchQueue.cc:107
#6  0x00007fa9efdc074c in DispatchQueue::DispatchThread::entry (this=0xdae3b0) at msg/DispatchQueue.h:85
#7  0x00007fa9efe2b119 in Thread::_entry_func (arg=0xdae3b0) at common/Thread.cc:41
#8  0x00007fa9ee9dbe9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9  0x00007fa9eece34bd in klogctl () from /lib/x86_64-linux-gnu/libc.so.6
#10 0x0000000000000000 in ?? ()

See ubuntu@teuthology:/a/sage-2012-12-11_19:47:13-rados-wip-3459-testing-basic/11922. I cannot for my life make sense out of the claimed segfault, although the op does look a little suspect:

(gdb) p op->pgid
$1 = {m_pool = 33, m_seed = 0, m_preferred = 0}

I do notice that the watch-notify handling in the Objecter just got changed though, so maybe that's involved.