rcll-refbox-instruct hangs while waiting for refbox connection

[snoato]

The tool rcll-refbox-instruct as used by the gazsim script with the parameter -w sporadically ends up in a deadlock situation on some systems. The deadlock occurs in io_service_.run() on line 313 in the context of this loop:

do {
	io_service_.run();
	io_service_.reset();
} while (!quit_);

Backtrace:

#0  0x00007f17aed58d1e in epoll_wait () from /lib64/libc.so.6
#1  0x0000000000494a60 in boost::asio::detail::epoll_reactor::run (this=0x1c121f0, usec=-1, ops=...) at /usr/include/boost/asio/detail/impl/epoll_reactor.ipp:471
#2  0x0000000000495feb in boost::asio::detail::scheduler::do_run_one (this=0x1c12920, lock=..., this_thread=..., ec=...) at /usr/include/boost/asio/detail/impl/scheduler.ipp:385
#3  0x0000000000495a64 in boost::asio::detail::scheduler::run (this=0x1c12920, ec=...) at /usr/include/boost/asio/detail/impl/scheduler.ipp:154
#4  0x0000000000496541 in boost::asio::io_context::run (this=0x4e3910 <io_service_>) at /usr/include/boost/asio/impl/io_context.ipp:62
#5  0x000000000048dbf9 in main (argc=2, argv=0x7ffeec257758) at /home/dswoboda/rcll-refbox/src/tools/rcll-refbox-instruct.cpp:322