curl: (52) Empty reply from server

[johnfelipe]

Host name	IP
felipe	192.168.0.14
ubuntu20dockers	192.168.88.186

---

felipe

sudo su

ip addres | grep dynamic

    inet 192.168.0.14/24 brd 192.168.0.255 scope global dynamic ens33

next

sudo curl -L git.io/weave -o /usr/local/bin/weave

sudo chmod a+x /usr/local/bin/weave

weave launch 192.168.88.186

0b87ebe4eb2fa79b74ece8eb42988c6706e93a9edae64dd99ae6ace1c0f3b7db

here issue

root@ubuntu20dockers:~# weave status connections
curl: (52) Empty reply from server

---

ubuntu20dockers

do this

sudo curl -L git.io/weave -o /usr/local/bin/weave

sudo chmod a+x /usr/local/bin/weave

weave launch 192.168.0.14

docker network ls

NETWORK ID     NAME                             DRIVER      SCOPE
679706fb2674   bridge                           bridge      local
8b74b15b3081   cassandra-cluster_cassandranet   bridge      local
fc27b3aeed94   clickhouse_default               bridge      local
f0a880d6cd18   host                             host        local
d7a4861d0681   my-stack_mynet                   bridge      local
7bb4289bf490   none                             null        local
c40acb60e412   rocketchat_default               bridge      local
b381cd33317e   weave                            weavemesh   local

here issue

root@felipe:~# weave status connections
curl: (52) Empty reply from server

[sms-system]

Hi! I had the same problem. And on errors, the docker logs weave command outputs this:

2022/08/19 18:18:09 http: panic serving 127.0.0.1:60970: runtime error: slice bounds out of range [:9] with length 8
goroutine 2068 [running]:
net/http.(*conn).serve.func1(0xc0000b74a0)
        /usr/local/go/src/net/http/server.go:1801 +0x147
panic(0x11fe5c0, 0xc0004e5fe0)
        /usr/local/go/src/runtime/panic.go:975 +0x47a
github.com/miekg/dns.ClientConfigFromReader(0x1405760, 0xc0004141b0, 0x0, 0x0, 0xc0004141b0)
        /go/src/github.com/weaveworks/weave/vendor/github.com/miekg/dns/clientconfig.go:94 +0x84f
github.com/miekg/dns.ClientConfigFromFile(0x7ffc49b54f03, 0x23, 0x0, 0x0, 0x0)
        /go/src/github.com/weaveworks/weave/vendor/github.com/miekg/dns/clientconfig.go:29 +0xc8
github.com/weaveworks/weave/nameserver.(*upstream).Config(0xc000138f60, 0x0, 0x0, 0x0)
        /go/src/github.com/weaveworks/weave/nameserver/dns.go:66 +0x1a5
github.com/weaveworks/weave/nameserver.NewStatus(0xc0003e0000, 0xc0003e0070, 0x0)
        /go/src/github.com/weaveworks/weave/nameserver/status.go:39 +0x2bb
main.HandleHTTP.func1(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
        /go/src/github.com/weaveworks/weave/prog/weaver/http.go:320 +0x330
main.HandleHTTP.func4.1(0x141a6a0, 0xc001a63260, 0xc0003dc100)
        /go/src/github.com/weaveworks/weave/prog/weaver/http.go:366 +0x44
net/http.HandlerFunc.ServeHTTP(0xc0004110c0, 0x141a6a0, 0xc001a63260, 0xc0003dc100)
        /usr/local/go/src/net/http/server.go:2042 +0x44
github.com/gorilla/mux.(*Router).ServeHTTP(0xc0003e0c40, 0x141a6a0, 0xc001a63260, 0xc000611f00)
        /go/src/github.com/weaveworks/weave/vendor/github.com/gorilla/mux/mux.go:159 +0x106
github.com/weaveworks/weave/common.(*loggingHandler).ServeHTTP(0xc000060da0, 0x141a6a0, 0xc001a63260, 0xc000611f00)
        /go/src/github.com/weaveworks/weave/common/http.go:13 +0x151
net/http.(*ServeMux).ServeHTTP(0x1b61500, 0x141a6a0, 0xc001a63260, 0xc000611f00)
        /usr/local/go/src/net/http/server.go:2417 +0x1ad
net/http.serverHandler.ServeHTTP(0xc0000fc0e0, 0x141a6a0, 0xc001a63260, 0xc000611f00)
        /usr/local/go/src/net/http/server.go:2843 +0xa3
net/http.(*conn).serve(0xc0000b74a0, 0x141de60, 0xc000035700)
        /usr/local/go/src/net/http/server.go:1925 +0x8ad
created by net/http.(*Server).Serve
        /usr/local/go/src/net/http/server.go:2969 +0x36c

I found the source of problem in https://github.com/miekg/dns library. And as I understand this was already fixed there (https://github.com/miekg/dns/pull/642). But weave still using old version of library.

When I updated the dependency to the latest version the problem with Empty reply from server disappeared.

[utybo]

Hi @sms-system, thanks for your discovery! do you happen to have a fork somewhere I could build and run to fix this issue? I have zero knowledge of Go or how to build weave sadly :/

[lchunleo]

Facing the same issue ..is the fix in the latest version?