I have another one doing this in the main process:

strace: Process 15800 attached                                          [76/116]
fcntl(9, F_GETFL)                       = 0x2 (flags O_RDWR)
fcntl(9, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
read(9, 0x7fae6fe93048, 8000)           = -1 EAGAIN (Resource temporarily unava$
lable)
fcntl(9, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
fcntl(9, F_SETFL, O_RDWR)               = 0
epoll_wait(12, [{EPOLLIN, {u32=1877571296, u64=140387178608352}}], 2, -1) = 1
fcntl(9, F_GETFL)                       = 0x2 (flags O_RDWR)
fcntl(9, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
read(9, "\27\3\3\0020\363vf\230\30\257K\302k\33\260\214\366d\265#\355\344|\304\$
57\21<\314\257\201p"..., 8000) = 565
fcntl(9, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
fcntl(9, F_SETFL, O_RDWR)               = 0
sendto(10, "<142>Jun  7 13:36:52 osrf_websoc"..., 385, MSG_NOSIGNAL, NULL, 0) = 
385
sendto(10, "<182>Jun  7 13:36:52 osrf_websoc"..., 386, MSG_NOSIGNAL, NULL, 0) = 
386
futex(0x7fae6c4396a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0},
 {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0}, 8) = 0
sendto(11, "<message to=\"<email address hidden>/o"..., 724, 0, NULL, 0) = 724
epoll_wait(12, [], 2, 0)                = 0
fcntl(9, F_GETFL)                       = 0x2 (flags O_RDWR)            [53/116]
fcntl(9, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
read(9, "\27\3\3\2P\271:~\0059\275\4\17\276\374\262\301%;\36\344-\272p\330\266n\
230\243d\202o"..., 8000) = 597
fcntl(9, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
fcntl(9, F_SETFL, O_RDWR)               = 0
sendto(10, "<142>Jun  7 13:36:52 osrf_websoc"..., 422, MSG_NOSIGNAL, NULL, 0) = 
422
sendto(10, "<182>Jun  7 13:36:52 osrf_websoc"..., 423, MSG_NOSIGNAL, NULL, 0) = 
423
futex(0x7fae6c4396a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0},
 {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0}, 8) = 0
sendto(11, "<message to=\"<email address hidden>/o"..., 761, 0, NULL, 0) = 761
epoll_wait(12, [], 2, 0)                = 0
fcntl(9, F_GETFL)                       = 0x2 (flags O_RDWR)
fcntl(9, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
read(9, "\27\3\3\1\300@\\\243\200\10`Kc9\353v\363)&\211M\36\2-\7\1%Eg\227\336\34
5"..., 8000) = 1620
fcntl(9, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
fcntl(9, F_SETFL, O_RDWR)               = 0
sendto(10, "<142>Jun  7 13:36:52 osrf_websoc"..., 275, MSG_NOSIGNAL, NULL, 0) = 
275
sendto(10, "<182>Jun  7 13:36:52 osrf_websoc"..., 276, MSG_NOSIGNAL, NUL[30/116]
276
futex(0x7fae6c4396a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0},
 {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0}, 8) = 0
sendto(11, "<message to=\"<email address hidden>/o"..., 614, 0, NULL, 0) = 614
epoll_wait(12, [], 2, 0)                = 0
sendto(10, "<142>Jun  7 13:36:52 osrf_websoc"..., 218, MSG_NOSIGNAL, NULL, 0) = 
218
sendto(10, "<182>Jun  7 13:36:52 osrf_websoc"..., 219, MSG_NOSIGNAL, NULL, 0) = 
219
futex(0x7fae6c4396a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0},
 {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0}, 8) = 0
sendto(11, "<message to=\"<email address hidden>/o"..., 560, 0, NULL, 0) = 560
epoll_wait(12, [], 2, 0)                = 0
sendto(10, "<142>Jun  7 13:36:52 osrf_websoc"..., 199, MSG_NOSIGNAL, NULL, 0) = 
199
sendto(10, "<182>Jun  7 13:36:52 osrf_websoc"..., 200, MSG_NOSIGNAL, NULL, 0) = 
200
futex(0x7fae6c4396a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0},
 {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7sendto(11, "<message to=\"<email address hidden>/o"..., 539, 0, NULL, 0) = 539[7/116]
epoll_wait(12, [], 2, 0)                = 0
sendto(10, "<142>Jun  7 13:36:52 osrf_websoc"..., 224, MSG_NOSIGNAL, NULL, 0) = 
224
sendto(10, "<182>Jun  7 13:36:52 osrf_websoc"..., 225, MSG_NOSIGNAL, NULL, 0) = 
225
futex(0x7fae6c4396a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0},
 {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7fae6f0904b0}, 8) = 0
sendto(11, "<message to=\"<email address hidden>/o"..., 563, 0, NULL, 0) = 563
epoll_wait(12, [], 2, 0)                = 0
fcntl(9, F_GETFL)                       = 0x2 (flags O_RDWR)
fcntl(9, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
read(9, 0x7fae6fe93048, 8000)           = -1 EAGAIN (Resource temporarily unavai
lable)
fcntl(9, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
fcntl(9, F_SETFL, O_RDWR)               = 0
epoll_wait(12, ^Cstrace: Process 15800 detached
 <detached ...>
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
  0.00    0.000000           0         5         2 read
  0.00    0.000000           0         6           rt_sigaction
  0.00    0.000000           0        18           sendto
  0.00    0.000000           0        20           fcntl
  0.00    0.000000           0         6           futex
  0.00    0.000000           0         7           epoll_wait
------ ----------- ----------- --------- --------- ----------------
100.00    0.000000                    62         2 total

While its first child process reports being in x32 mode and the second is doing the sleep handler.

This looks like maybe something on our end, but I am uncertain.