linux--异常--NoRouteToHostException: Cannot assign requested address有关问题
2014-01-03 19:23
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NoRouteToHostException: Cannot assign requested address问题
解决办法:
执行命令修改如下2个内核参数
sysctl -w net.ipv4.tcp_timestamps=1 开启对于TCP时间戳的支持,若该项设置为0,则下面一项设置不起作用
sysctl -w net.ipv4.tcp_tw_recycle=1 表示开启TCP连接中TIME-WAIT sockets的快速回收
=================================
查询本地可用端口范围:
cat /proc/sys/net/ipv4/ip_local_port_range
32768 61000
查询端口占用个数
netstat -an|wc -l
16654
查询tcp状态
netstat -anp|less
tcp 0 0 ::ffff:192.168.1.1:39205 ::ffff:192.168.2.1:18991 TIME_WAIT -
tcp 0 0 ::ffff:192.168.1.1:34767 ::ffff:192.168.2.1:18991 TIME_WAIT -
tcp 0 0 ::ffff:192.168.1.1:54324 ::ffff:192.168.2.1:18991 TIME_WAIT -
修改端口范围
echo 1024 65000 > /proc/sys/net/ipv4/ip_local_port_range
注意:因为/proc/sys/net/ipv4/ip_local_port_range文件是个虚拟文件,不能用vi直接编辑,
所以使用 > 命令可以修改。
解决办法:
执行命令修改如下2个内核参数
sysctl -w net.ipv4.tcp_timestamps=1 开启对于TCP时间戳的支持,若该项设置为0,则下面一项设置不起作用
sysctl -w net.ipv4.tcp_tw_recycle=1 表示开启TCP连接中TIME-WAIT sockets的快速回收
=================================
查询本地可用端口范围:
cat /proc/sys/net/ipv4/ip_local_port_range
32768 61000
查询端口占用个数
netstat -an|wc -l
16654
查询tcp状态
netstat -anp|less
tcp 0 0 ::ffff:192.168.1.1:39205 ::ffff:192.168.2.1:18991 TIME_WAIT -
tcp 0 0 ::ffff:192.168.1.1:34767 ::ffff:192.168.2.1:18991 TIME_WAIT -
tcp 0 0 ::ffff:192.168.1.1:54324 ::ffff:192.168.2.1:18991 TIME_WAIT -
修改端口范围
echo 1024 65000 > /proc/sys/net/ipv4/ip_local_port_range
注意:因为/proc/sys/net/ipv4/ip_local_port_range文件是个虚拟文件,不能用vi直接编辑,
所以使用 > 命令可以修改。
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