librados lock issue

Thread 75 (Thread 0x7fb5fc473700 (LWP 10187)):
#0  0x00007fb606b772d4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#1  0x00007fb5f4dee881 in Wait (mutex=..., this=0x7fb5fc4726b0) at ./common/Cond.h:55
No locals.
#2  librados::IoCtxImpl::write (this=0x298e2d0, oid=..., bl=..., len=4011, off=0) at librados/IoCtxImpl.cc:466
        cond = {
          _vptr.Cond = 0x7fb5f5259e10,
          _c = {
            __data = {
              __lock = 0,
              __futex = 1,
              __total_seq = 1,
              __wakeup_seq = 0,
              __woken_seq = 0,
              __mutex = 0x7fb5fc472700,
              __nwaiters = 2,
              __broadcast_seq = 0
            },
            __size = "\000\000\000\000\001\000\000\000\001", '\000' , "'G\374\265\177\000\000\002\000\000\000\000\000\000",
            __align = 4294967296
          },
          waiter_mutex = 0x7fb5fc4726f0
        }
        done = false
        ver = {
          version = 0,
          epoch = 0,
          __pad = 0
        }
        pop = 0x0
        ut =
        mylock = {
          name = 0x7fb5f4fb667d "IoCtxImpl::write::mylock",
          id = -1,
          recursive = false,
          lockdep = true,
          backtrace = false,
          _m = {
            __data = {
              __lock = 0,
              __count = 0,
              __owner = 0,
              __nusers = 1,
              __kind = 2,
              __spins = 0,
              __list = {
                __prev = 0x0,
                __next = 0x0
              }
            },
            __size = '\000' , "\001\000\000\000\002", '\000' ,
            __align = 0
          },
          nlock = 0,
          locked_by = 0,
          cct = 0x0,
          logger = 0x0
        }
        r =
        onack =
        op = {
          ops = std::vector of length 0, capacity 0,
          flags = 0,
          priority = 0,
          out_bl = std::vector of length 0, capacity 0,
          out_handler = std::vector of length 0, capacity 0,
          out_rval = std::vector of length 0, capacity 0
        }
#3  0x00007fb5f4dd08f7 in rados_write (io=0x298e2d0, o=,
    buf=0x7fb5cdb59070 "\r\n\241\241\241\241\241\276\300\264Դ\243\272\326й\372\307\340\304\352\324\323־\241\277 \241\276\327\367\325ߣ\272\266\376\324\302\301\372\241\277\r\n\241\241\241\241\264\323ǰ\243\254\316Ҳ\273\317\340\320\305ʲô\314쳤\265ؾã\254\265\253\324\332\301\371\274\266\325\342\300\357\316ҿ\264\265\275\301\313\327Լ\272\265ĺ\243\277\335ʯ\300á\243\316\322\322Ѿ\255\277\274\265\275\301\371\274\266\270ĸҲ\320\355\273\271\273ῼ\265\275\301\371\274\266ȡ\317\373Ϊֹ\243\241\r\n\241\241\241\241\062\060\060\065\304\352\066\324\302\061\071\310\325\312Ǵ\363ѧ\313\304\301\371\274\266\277\274\312Ը", ..., len=4011, off=0)
    at librados/librados.cc:1595
        ctx = 0x298e2d0
        oid = {
          name = "62808951"
        }
        bl = {
          _buffers = std::list = {
            [0] = {
              _raw = 0x7fb5dc076fd0,
              _off = 0,
              _len = 4011
            }
          },
          _len = 4011,
          append_buffer = {
            _raw = 0x7fb5dc076fd0,
            _off = 0,
            _len = 4011
          },
          last_p = {
            bl = 0x7fb5fc472820,
            ls = 0x7fb5fc472820,
            off = 0,
            p = {
              _raw = ,
              _off = 3691474896,
              _len = 32693
            },
            p_off = 0
          }
        }
#4  0x00007fb5f5a2dccb in x_write (env=0x7fb5fc472dc0, argc=4, argv=0x7fb607b4c400) at rados_io.cpp:240
        io = 0x298e2d0
        ibin = {
          size = 4011,
          data = 0x7fb5cdb59070 "\r\n\241\241\241\241\241\276\300\264Դ\243\272\326й\372\307\340\304\352\324\323־\241\277 \241\276\327\367\325ߣ\272\266\376\324\302\301\372\241\277\r\n\241\241\241\241\264\323ǰ\243\254\316Ҳ\273\317\340\320\305ʲô\314쳤\265ؾã\254\265\253\324\332\301\371\274\266\325\342\300\357\316ҿ\264\265\275\301\313\327Լ\272\265ĺ\243\277\335ʯ\300á\243\316\322\322Ѿ\255\277\274\265\275\301\371\274\266\270ĸҲ\320\355\273\271\273ῼ\265\275\301\371\274\266ȡ\317\373Ϊֹ\243\241\r\n\241\241\241\241\062\060\060\065\304\352\066\324\302\061\071\310\325\312Ǵ\363ѧ\313\304\301\371\274\266\277\274\312Ը", ...,
          bin_term = 140417520405442,
          ref_bin = 0x0
        }
        err = 32693
        func_name = 0x7fb5f5a368ec "x_write()"
        id = 3627
        oid = "62808951", '\000'
        offset = 0
#5  0x0000000000521e2e in process_main ()