bitcoind thread 3 bt

(gdb) thread 3
[Switching to thread 3 (Thread 0x7fcdd8a32700 (LWP 29874))]
#0  0x00007fce1501a50d in recvmsg () at ../sysdeps/unix/syscall-template.S:82
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
(gdb) bt
#0  0x00007fce1501a50d in recvmsg () at ../sysdeps/unix/syscall-template.S:82
#1  0x00000000004dfdd4 in boost::asio::detail::socket_ops::recv (s=s@entry=31,
    bufs=bufs@entry=0x7fcdd8a31790, count=count@entry=1, flags=flags@entry=0,
    ec=...) at /usr/include/boost/asio/detail/impl/socket_ops.ipp:691
#2  0x00000000004e0398 in boost::asio::detail::socket_ops::sync_recv (s=31,
    state=<optimized out>, bufs=bufs@entry=0x7fcdd8a31790,
    count=count@entry=1, flags=flags@entry=0, all_empty=<optimized out>,
    ec=...) at /usr/include/boost/asio/detail/impl/socket_ops.ipp:718
#3  0x0000000000504a11 in receive<boost::asio::mutable_buffers_1> (ec=...,
    buffers=..., this=<optimized out>, impl=..., flags=<optimized out>)
    at /usr/include/boost/asio/detail/reactive_socket_service_base.hpp:248
#4  receive<boost::asio::mutable_buffers_1> (ec=..., buffers=..., impl=...,
    this=<optimized out>, flags=<optimized out>)
    at /usr/include/boost/asio/stream_socket_service.hpp:308
#5  boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >::read_some<boost::asio::mutable_buffers_1> (this=<optimized out>, buffers=...)
    at /usr/include/boost/asio/basic_stream_socket.hpp:713
#6  0x000000000050544d in SSLIOStreamDevice<boost::asio::ip::tcp>::read (
    this=this@entry=0x7fcdd0015f20,
    s=0x7fcdd0027a74 "{\"method\": \"getwork\", \"params\": [], \"id\":0}\nplbDpzbW9vdGg=\r\nHost: 10.10.20.30:8332\r\nAccept: */*\r\nAccept-Encoding: deflate, gzip\r\nContent-type: application/json\r\nX-Mining-Extensions: longpoll midstate "..., n=4096) at bitcoinrpc.cpp:577
#7  0x0000000000505517 in read<SSLIOStreamDevice<boost::asio::ip::tcp> > (
    n=<optimized out>, s=<optimized out>, t=...)
    at /usr/include/boost/iostreams/read.hpp:186
#8  read<SSLIOStreamDevice<boost::asio::ip::tcp> > (n=<optimized out>,
    s=<optimized out>, t=...) at /usr/include/boost/iostreams/read.hpp:52
#9  read<SSLIOStreamDevice<boost::asio::ip::tcp>, boost::iostreams::detail::linked_streambuf<char, std::char_traits<char> > > (s=<optimized out>, dev=...,
    n=<optimized out>)
    at /usr/include/boost/iostreams/detail/adapter/concept_adapter.hpp:172
#10 read<boost::iostreams::detail::linked_streambuf<char, std::char_traits<char> > > (n=<optimized out>, s=<optimized out>, this=0x7fcdd0015f20,
---Type <return> to continue, or q <return> to quit---
    src=<optimized out>)
    at /usr/include/boost/iostreams/detail/adapter/concept_adapter.hpp:78
#11 boost::iostreams::detail::indirect_streambuf<SSLIOStreamDevice<boost::asio::ip::tcp>, std::char_traits<char>, std::allocator<char>, boost::iostreams::bidirectional>::underflow (this=0x7fcdd0015ed8)
    at /usr/include/boost/iostreams/detail/streambuf/indirect_streambuf.hpp:258
#12 0x00007fce14d7f093 in std::basic_istream<char, std::char_traits<char> >& std::getline<char, std::char_traits<char>, std::allocator<char> >(std::basic_istream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, char) () from /lib64/libstdc++.so.6
#13 0x00000000004d61a9 in ReadHTTPRequestLine (stream=...,
    proto=@0x7fcdd8a3198c: 0, http_method="", http_uri="")
    at bitcoinrpc.cpp:370
#14 0x00000000004d9b32 in ThreadRPCServer3 (parg=0x7fcdd0015d70)
    at bitcoinrpc.cpp:986
#15 0x00007fce1603f709 in ?? () from /lib64/libboost_thread-mt.so.1.48.0
#16 0x00007fce15013d14 in start_thread (arg=0x7fcdd8a32700)
    at pthread_create.c:309
#17 0x00007fce1453368d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115