So on one of my local development machines haproxy started pegging the
CPU at 100%
`strace -T` on the process just shows:
...
epoll_wait(0, {}, 200, 0) = 0 <0.000003>
epoll_wait(0, {}, 200, 0) = 0 <0.000003>
epoll_wait(0, {}, 200, 0) = 0 <0.000003>
epoll_wait(0, {}, 200, 0) = 0 <0.000003>
epoll_wait(0, {}, 200, 0) = 0 <0.000003>
epoll_wait(0, {}, 200, 0) = 0 <0.000003>
...
Opening it up with gdb, the backtrace shows:
(gdb) bt
#0 0x00007f4d18ba82a3 in __epoll_wait_nocancel () from /lib64/libc.so.6
#1 0x00007f4d1a570ebc in _do_poll (p=<optimized out>, exp=-1440976915)
at src/ev_epoll.c:125
#2 0x00007f4d1a4d3098 in run_poll_loop () at src/haproxy.c:1737
#3 0x00007f4d1a4cf2c0 in main (argc=<optimized out>, argv=<optimized
out>) at src/haproxy.c:2097
This is haproxy 1.7.0 on CentOS/7
Unfortunately I'm not sure what triggered it.
-Patrick
