java.net.NoRouteToHostException SOLVED

java.net.NoRouteToHostException SOLVED

SOLVED
java.net.NoRouteToHostException

cat /proc/sys/net/ipv4/ip_local_port_range
32768 - 61000

Solution
1. Lowest waiting time to release the door, the default is 60, modified to 15 ~ 30s
echo 30 >/proc/sys/net/ipv4/tcp_fin_timeout

2. The default is 0, change to 1 to release a new connection to a TIME_WAIT port.
echo 1 >/proc/sys/net/ipv4/tcp_tw_reuse

3. Modify TCP / IP protocol configuration, fast recovery of socket resources, default is 0, modify to 1.
echo 1 >/proc/sys/net/ipv4/tcp_tw_recycle

The whole process in one line:
echo 30 >/proc/sys/net/ipv4/tcp_fin_timeout && echo 1 >/proc/sys/net/ipv4/tcp_tw_reuse && echo 1 >/proc/sys/net/ipv4/tcp_tw_recycle

Ref: http://www.itdadao.com/articles/c15a1389796p0.html