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  • Dell 刀片服务器CentOS6.5mini开机20~30分钟宕机

    今天查看系统日志发现大量的nf_conntrack: table full, dropping packet. 错误

    cat /var/log/messages | more
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:05 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:10 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:15 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:23 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    Jun  7 09:52:30 localhost kernel: nf_conntrack: table full, dropping packet.
    解决办法:
    vim /etc/sysctl.conf
    加入:
    net.nf_conntrack_max = 655350
    net.netfilter.nf_conntrack_tcp_timeout_established = 1200
    CENTOS 6.1或以上版本使用:
    net.netfilter.nf_conntrack_max = 655350
    net.netfilter.nf_conntrack_tcp_timeout_established = 1200
    保存后执行 sysctl -p 使之生效,然后观察该错误是不是没有了。
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  • 原文地址:https://www.cnblogs.com/hamy/p/3683343.html
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