Comment 1 for bug 1533495

(gdb) fr 4
#4 0x0000000000fde523 in TaskImpl::execute (this=<optimized out>) at controller/src/base/task.cc:253
253 controller/src/base/task.cc: No such file or directory.
(gdb) p what
$1 = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>},
    _M_p = 0x7ff60cb3e708 "boost::filesystem::directory_iterator::construct: Too many open files: \"/var/run/netns\""}}