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recv() failed. Error: Resource temporarily unavailable ［11］

基本信息： PHP 5.6.4；Swoole版本 1.7.20 代码中打印了$serv->send（）；值为true；通过tcpdump查看网络通信过程，看的不是太懂，下面是我通过tcpdump得到的过程，请帮忙分析下，谢谢

不太会弄格式，不好意思

{{{
tcpdump host 192.168.2.142 and 192.168.2.152
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
18:12:49.104862 ARP, Request who-has 192.168.2.142 tell 192.168.2.152, length 28
18:12:49.753857 ARP, Reply 192.168.2.142 is-at 34:23:87:f7:c9:61 (oui Unknown), length 46
18:12:49.753868 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [S], seq 3166435416, win 14600, options [mss 1460,sackOK,TS val 451978718 ecr 0,nop,wscale 7], length 0
18:12:50.117801 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [S], seq 3166435416, win 14600, options [mss 1460,sackOK,TS val 451979731 ecr 0,nop,wscale 7], length 0
18:12:50.848015 IP 192.168.2.142.11601 > 192.168.2.152.47034: Flags [S.], seq 602191362, ack 3166435417, win 14480, options [mss 1460,sackOK,TS val 30640180 ecr 451978718,nop,wscale 6], length 0
18:12:50.848086 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [.], ack 1, win 115, options [nop,nop,TS val 451980462 ecr 30640180], length 0
18:12:50.848310 IP 192.168.2.142.11601 > 192.168.2.152.47034: Flags [S.], seq 602191362, ack 3166435417, win 14480, options [mss 1460,sackOK,TS val 30640180 ecr 451978718,nop,wscale 6], length 0
18:12:50.848323 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [.], ack 1, win 115, options [nop,nop,TS val 451980462 ecr 30640180], length 0
18:12:50.848564 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [P.], seq 1:237, ack 1, win 115, options [nop,nop,TS val 451980462 ecr 30640180], length 236
18:12:51.992946 IP 192.168.2.142.11601 > 192.168.2.152.47034: Flags [.], ack 237, win 243, options [nop,nop,TS val 30641264 ecr 451980462], length 0
18:12:51.993424 IP 192.168.2.142.11601 > 192.168.2.152.47034: Flags [P.], seq 1:190, ack 237, win 243, options [nop,nop,TS val 30641269 ecr 451980462], length 189
18:12:51.993460 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [.], ack 190, win 123, options [nop,nop,TS val 451981607 ecr 30641269], length 0
18:12:51.993748 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [P.], seq 237:410, ack 190, win 123, options [nop,nop,TS val 451981607 ecr 30641269], length 173
18:12:52.351816 IP 192.168.2.142.11601 > 192.168.2.152.47034: Flags [.], ack 410, win 260, options [nop,nop,TS val 30642090 ecr 451981607], length 0
18:13:21.999660 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [F.], seq 410, ack 190, win 123, options [nop,nop,TS val 452011613 ecr 30642090], length 0
18:13:22.036338 IP 192.168.2.142.11601 > 192.168.2.152.47034: Flags [F.], seq 190, ack 411, win 260, options [nop,nop,TS val 30671839 ecr 452011613], length 0
18:13:22.036371 IP 192.168.2.152.47034 > 192.168.2.142.11601: Flags [.], ack 191, win 123, options [nop,nop,TS val 452011650 ecr 30671839], length 0
}}}

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花偶人间

不太会弄格式，不好意思