樹莓派(Cannot assign requested address)的解決過程

時間  2019-11-07
標籤 樹莓 assign requested address 解決 過程 简体版
原文   原文鏈接

樹莓派一個沒法分配被請求地址問題(Cannot assign requested address)的解決過程

問題描述

在用 ecl 加載 swank 服務端時返回錯誤:linux

pi@rpi ~ $ ecl -load ~/.vim/bundle/slimv/slime/start-swank.lisp
;;; Loading "/home/pi/.vim/bundle/slimv/slime/start-swank.lisp"
;;; Loading "/opt/github/slimv/slime/swank-loader.lisp"
;;; Warning: No architecture feature found in (POWERPC PPC X86 X86-64 X86_64
                                               AMD64 I686 I586 I486 PC386
                                               IAPX386 SPARC64 SPARC HPPA64
                                               HPPA ARM PENTIUM3 PENTIUM4
                                               JAVA-1.4 JAVA-1.5 JAVA-1.6
                                               JAVA-1.7).
;;; Loading #P"/usr/local/lib/ecl-16.1.2/cmp.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/backend.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/ecl.fas"
;;; Loading #P"/usr/local/lib/ecl-16.1.2/sockets.fas"
;;; Loading #P"/usr/local/lib/ecl-16.1.2/profile.fas"
;;; Loading #P"/usr/local/lib/ecl-16.1.2/serve-event.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/gray.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/match.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/rpc.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/swank.fas"
An error occurred during initialization:
Socket error in "bind": 99 (Cannot assign requested address).
pi@rpi ~ $

第一次嘗試

先以 Cannot assign requested address 做爲關鍵字在網上查了半天, 絕大多數的都說是鏈接太多端口不夠, 要及時釋放, 解決辦法以下:nginx

pi@rpi /usr/share/nginx $ sudo sysctl -w net.ipv4.tcp_timestamps=1
pi@rpi /usr/share/nginx $ sudo sysctl -w net.ipv4.tcp_tw_recycle=1
pi@rpi /usr/share/nginx $ cat /proc/sys/net/ipv4/tcp_timestamps
1
pi@rpi /usr/share/nginx $ cat /proc/sys/net/ipv4/tcp_tw_recycle
1
pi@rpi /usr/share/nginx $

第二次嘗試

有的人說前面的說法不正確, 是端口範圍要擴大(針對 ubuntu 12.04版本 ), 解決辦法是:git

pi@rpi /usr/share/nginx $ echo 32768 61000 > /proc/sys/net/ipv4/ip_local_port_range
pi@rpi /usr/share/nginx $ cat /proc/sys/net/ipv4/ip_local_port_range
32768   61000

但是貌似在個人樹莓派上都沒起做用.github

開始第一次猜想

個人初步判斷是由於啓動了相似 nginx 這樣的服務程序, 因此在地址分配方面發生了莫名其妙的衝突, 一個解決辦法就是把這些服務全給停掉redis

pi@rpi ~ $ sudo service docker status                                                                                                                                             
Docker is running.
pi@rpi ~ $ sudo service docker stop
Stopping Docker: docker.
pi@rpi ~ $ sudo service docker status 
Docker is not running ... failed!
pi@rpi ~ $ sudo service redis-server status
redis-server is running
pi@rpi ~ $ sudo service redis-server stop
Stopping redis-server: redis-server.
pi@rpi ~ $ sudo service redis-server status
redis-server is not running
pi@rpi ~ $

服務所有停掉, 但是問題依舊.docker

開始第二次猜想

我繼續猜想也有多是網絡配置引發的, 看看這個網絡配置, 總感受有些不太對勁, 但是具體哪裏有問題, 也說不出來:ubuntu

pi@rpi ~ $ ifconfig
docker0   Link encap:Ethernet  HWaddr 02:42:ec:c9:aa:72  
          inet addr:172.17.0.1  Bcast:0.0.0.0  Mask:255.255.0.0
          inet6 addr: fe80::cb3e:8ad4:3a00:2a07/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr b8:27:eb:48:8f:ee  
          inet addr:192.168.0.100  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::ba27:ebff:fe48:8fee/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2074 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1615 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:151891 (148.3 KiB)  TX bytes:441121 (430.7 KiB)

pi@rpi ~ $

更換搜索關鍵字

突然想到我是在用 ecl 啓動 swank 的過程當中報錯的, 那麼試着換換關鍵字搜索一下, 這回用 "swank Cannot assign requested address" 當關鍵字放狗來搜, 很幸運的第一個就搜到了一條貌似很是接近個人狀況的Swank socket problemvim

他的問題跟我差很少,也是想經過 SBCL 加載 swank 時出錯, 錯誤信息:網絡

* (load "swank-loader.lisp")
...
* (swank:create-server :port 12345)

debugger invoked on a SB-BSD-SOCKETS:SOCKET-ERROR in thread #<THREAD
"initial thread" RUNNING {AA1B639}>:
Socket error in "bind": 99 (Cannot assign requested address)

回覆提到要檢查 loopback 接口socket

That usualy means you are trying to bind socket on the address not on
this machine.
I think slime determines your address by localhost or hostname, are
they right? And does loopback 127.0.0.1 exist?

而後樓主的反饋證明他的 loopback 接口沒起來, 起來就行了:

Thanks for the hint, the loopback interface was not started.
Now it works :)
Cornelius

我上面的網絡情況好像也沒看到 loopback 接口, 先備份原來的配置文件, 再試着改改配置把它跑起來, 修改後的網絡配置文件以下:

pi@rpi ~ $ sudo vi /etc/network/interfaces

  1 auto lo
  2 iface lo inet loopback
  3 iface eth0 inet dhcp
  4 
  5 allow-hotplug wlan0
  6 auto wlan0

pi@rpi ~ $

修改後保存, 試着執行這個命令重啓下網絡配置:

sudo /etc/init.d/networking restart

結果沒效果, 仍是沒搞起 lo 來, 只好用 sudo reboot 重啓系統, 重啓後終於發現了久違的 lo 接口:

pi@rpi ~ $ ifconfig
docker0   Link encap:Ethernet  HWaddr 02:42:01:89:10:22  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr b8:27:eb:48:8f:ee  
          inet addr:192.168.0.100  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::ba27:ebff:fe48:8fee/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:125 errors:0 dropped:0 overruns:0 frame:0
          TX packets:146 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:15662 (15.2 KiB)  TX bytes:20296 (19.8 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1104 (1.0 KiB)  TX bytes:1104 (1.0 KiB)

pi@rpi ~ $

淚流滿面啊, 這回再試試, 哈哈, 終於成功:

pi@rpi ~ $ ecl -load ~/.vim/bundle/slimv/slime/start-swank.lisp
;;; Loading "/home/pi/.vim/bundle/slimv/slime/start-swank.lisp"
;;; Loading "/opt/github/slimv/slime/swank-loader.lisp"
;;; Warning: No architecture feature found in (POWERPC PPC X86 X86-64 X86_64
                                               AMD64 I686 I586 I486 PC386
                                               IAPX386 SPARC64 SPARC HPPA64
                                               HPPA ARM PENTIUM3 PENTIUM4
                                               JAVA-1.4 JAVA-1.5 JAVA-1.6
                                               JAVA-1.7).
;;; Loading #P"/usr/local/lib/ecl-16.1.2/cmp.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/backend.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/ecl.fas"
;;; Loading #P"/usr/local/lib/ecl-16.1.2/sockets.fas"
;;; Loading #P"/usr/local/lib/ecl-16.1.2/profile.fas"
;;; Loading #P"/usr/local/lib/ecl-16.1.2/serve-event.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/gray.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/match.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/rpc.fas"
;;; Loading "/home/pi/.slime/fasl/2014-10-10/ecl-16.1.2-linux-unknown/swank.fas"
;; Swank started at port: 4005.

再在 tmux 上開個窗口用 telnet 試着連一下:

pi@rpi ~ $ telnet 127.0.0.1 4005
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.

很好, 終於看到 CL-USER> 這個提示符了:

CL-USER> (+ 1 2)
3
CL-USER>

至此, 問題完美解決, 教訓就是:

不能光憑經驗下結論, 必定要查看最基本的網絡狀況( ifconfig )

知識點

另外, 又瞭解到一個知識點: loopback 接口沒起來的話, 也會致使 Socket error in "bind": 99 (Cannot assign requested address) 錯誤的出現.

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