nc via socat closed connection

2015/07/21 04:30:24 socat[25805] N opening connection to AF=1 "/tmp/hyperfastcgi.socket"
2015/07/21 04:30:24 socat[25805] D socket(1, 1, 0)
2015/07/21 04:30:24 socat[25805] I socket(1, 1, 0) -> 3
2015/07/21 04:30:24 socat[25805] D fcntl(3, 2, 1)
2015/07/21 04:30:24 socat[25805] D fcntl() -> 0
2015/07/21 04:30:24 socat[25805] D connect(3, {1,AF=1 "/tmp/hyperfastcgi.socket"}, 26)
2015/07/21 04:30:24 socat[25805] D connect() -> 0
2015/07/21 04:30:24 socat[25805] D getsockname(3, 0x7ffff07f3cd0, 0x7ffff07f3b5c{112})
2015/07/21 04:30:24 socat[25805] D getsockname(, {AF=1 "<anon>"}, {2}) -> 0
2015/07/21 04:30:24 socat[25805] N successfully connected from local address AF=1 "\0\0\0\0\0\0\0\0\0\x02\0\0\0\0[\0\0\0|\0\0\0w\0"
2015/07/21 04:30:24 socat[25805] I resolved and opened all sock addresses
2015/07/21 04:30:24 socat[25805] D malloc(16385)
2015/07/21 04:30:24 socat[25805] D malloc() -> 0x1252590
2015/07/21 04:30:24 socat[25805] N starting data transfer loop with FDs [4,4] and [3,3]
2015/07/21 04:30:24 socat[25805] D data loop: sock1->eof=0, sock2->eof=0, closing=0, wasaction=1, total_to={0.000000}
2015/07/21 04:30:24 socat[25805] D select(5, &0x18, &0x18, &0x0, NULL/0.000000)
2015/07/21 04:30:24 socat[25805] D select -> (, 0x0, 0x18, 0x0, NULL/0.000000), 2
2015/07/21 04:30:24 socat[25805] D data loop: sock1->eof=0, sock2->eof=0, closing=0, wasaction=1, total_to={0.000000}
2015/07/21 04:30:24 socat[25805] D select(5, &0x18, &0x0, &0x0, NULL/0.000000)
2015/07/21 04:30:25 socat[25805] D select -> (, 0x10, 0x0, 0x0, NULL/0.000000), 1
2015/07/21 04:30:25 socat[25805] D read(4, 0x1252590, 8192)
2015/07/21 04:30:25 socat[25805] D read -> 0
2015/07/21 04:30:25 socat[25805] N socket 1 (fd 4) is at EOF
2015/07/21 04:30:25 socat[25805] I shutdown(3, 1)
2015/07/21 04:30:25 socat[25805] D shutdown()  -> 0
2015/07/21 04:30:25 socat[25805] D data loop: sock1->eof=2, sock2->eof=0, closing=1, wasaction=1, total_to={0.000000}
2015/07/21 04:30:25 socat[25805] D select(4, &0x8, &0x0, &0x0, &2.000000)
2015/07/21 04:30:27 socat[25805] D select -> (, 0x0, 0x0, 0x0, &0.000000), 0
2015/07/21 04:30:27 socat[25805] I poll timed out (no data within 2.000000 seconds)
2015/07/21 04:30:27 socat[25805] I shutdown(4, 2)
2015/07/21 04:30:27 socat[25805] D shutdown()  -> 0
2015/07/21 04:30:27 socat[25805] I shutdown(3, 2)
2015/07/21 04:30:27 socat[25805] D shutdown()  -> 0
2015/07/21 04:30:27 socat[25805] N exiting with status 0
2015/07/21 04:30:27 socat[25805] D exit(0)
2015/07/21 04:30:27 socat[25774] I childdied(signum=17)
2015/07/21 04:30:27 socat[25774] D waitpid(-1, 0x7ffff07f31bc, 1)
2015/07/21 04:30:27 socat[25774] D waitpid(, {0}, ) -> 25805
2015/07/21 04:30:27 socat[25774] I childdied(17): cannot identify child 25805
2015/07/21 04:30:27 socat[25774] D saving pid in diedunknown3
2015/07/21 04:30:27 socat[25774] I waitpid(): child 25805 exited with status 0
2015/07/21 04:30:27 socat[25774] D waitpid(-1, 0x7ffff07f31bc, 1)
2015/07/21 04:30:27 socat[25774] D waitpid(, {0}, ) -> -1
2015/07/21 04:30:27 socat[25774] I waitpid(-1, {}, WNOHANG): No child processes
2015/07/21 04:30:27 socat[25774] I childdied() finished