Golang dial tcp: lookup no such host

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于 2022-01-06 19:19:59 首次发布

dial tcp: lookup xxx.com on 8.8.8.8:53: no such host

最近在执行go mod tidy更新依赖库时遇到如下问题：

 dial tcp: lookup xxx.com on 8.8.8.8:53: no such host



 但我的mac明明没有任何地方配置8.8.8.8啊， 而且我抓包看了，mac确实没有给8.8.8.8发任何请求。

 继续仔细分析，看到这个提示：

 reading https://sum.golang.org/lookup/xxx.com

 就是这里了，原来是这里在向8.8.8.8发起请求，然后8.8.8.8无法识别。



 问题原因：Go 1.13设置了默认的GOSUMDB=sum.golang.org，它当然是无法识别私有域名xxx.com .

 解决办法：

 go env -w GOPRIVATE=xxx.como

 或者：

 go env -w GOSUMDB=off

搞了好长时间没弄出来，看了一篇博客顺利解决问题，一看作者，竟然是涛哥。。。果然厉害。
原文链接：https://blog.csdn.net/stpeace/article/details/106875395

原创

ghostwritten 2022-05-31 00:38:53 博主文章分类：kubernetes ©著作权

文章标签 kubernetes 无法识别 golang 文章分类 kubernetes 云计算

©著作权归作者所有：来自51CTO博客作者ghostwritten的原创作品，请联系作者获取转载授权，否则将追究法律责任

reading https://sum.golang.org/lookup/xxx.com

就是这里了，原来是这里在向8.8.8.8发起请求，然后8.8.8.8无法识别。

问题原因：Go 1.13设置了默认的GOSUMDB=sum.golang.org，它当然是无法识别私有域名xxx.com .
解决办法：

go env -w GOPRIVATE=xxx.como

或者：

go env -w GOSUMDB=off

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Jul 30, 2013, 12:41:14 PM7/30/13

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Aug 16, 2013, 2:19:22 AM8/16/13

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Updates:
Labels: -Go1.2Maybe Go1.3Maybe

Comment #19 on issue 3575 by : net: LookupHost("localhost")

Not sure what to do. Deferring to Go1.3 so we can revisit it then and hope
the underlying problem fixed.

unread,

Oct 14, 2013, 12:26:33 AM10/14/13

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Comment #21 on issue 3575 by : net:

Verified on OSX 10.8.4. The exhaustion seems to be FD related to kqueue.
Both the go program and a simple python program. lsof indicates about 250
open KQUEUE file handles.

Attachments:
dnserror.py 128 bytes

unread,

Dec 2, 2013, 3:23:11 PM12/2/13

to

Comment #24 on issue 3575 by : net: LookupHost("localhost")

I can also confirm that I have this problem on multiple environments
(latest OSX, CentOS 6, CentOS 5 and Ubuntu 13.10). All 64 bit machines.

unread,

Dec 9, 2013, 12:54:23 AM12/9/13

to

Comment #27 on issue 3575 by : net:

My go code kicks off 16 goroutines to concurrently run sql on postgresql
databases that are on hosts n01..n16 on my local network.

Once in a while (but not always) I get errors such as these:
dbh.Prepare():dial tcp: lookup n02: no such host
dbh.Prepare():dial tcp: lookup n05: no such host
Usually when this occurs only 2 to 3 hosts are not found, while the rest
are found.

When I do another run of the program immediately after getting such errors,
then the errors dissappear.

Also if I replace the hostnames by ip-addresses in the database connection
parameter string, then the errors do not occur.

System: debian linux running kernel 3.2.0-4-amd64
Go version go1.2 linux/amd64

unread,

Dec 9, 2013, 2:47:38 AM12/9/13

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unread,

Aug 18, 2014, 10:43:05 AM8/18/14

to

Comment #29 on issue 3575 by : net: LookupHost("localhost")

Still having this problem on Go 1.3.1.

unread,

Aug 18, 2014, 1:48:15 PM8/18/14

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Comment #30 on issue 3575 by : net:

fiorix, what version of glibc do you have? It's likely you don't have their
fix yet. I think this was determined to not be a Go bug (see Issue 6336).
We might detect and work around it, though.

Alternatively, you can update your glibc, or use the netgo build tag and
use Go's built-in DNS resolver instead of the system one.

unread,

Aug 27, 2014, 7:39:31 PM8/27/14

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Comment #31 on issue 3575 by : net: LookupHost("localhost")

returning "no such host" error

https://code.google.com/p/go/issues/detail?id=3575

It's Ubuntu 14.04 with the latest libc 2.19. I've been following Issue 6336
as well. Tried the netgo build tag (go install -a -tags netgo std and netgo
net iirc) but dns resolution eventually stops working after a while.
Perhaps because my program uses sqlite thus cgo can't be disabled? Not sure
if that has anything to do with it.

unread,

Sep 12, 2014, 10:18:37 AM9/12/14

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Comment #32 on issue 3575 by : net: LookupHost("localhost")

Works by doing "go install -a -tags netgo net my-pkg"

unread,

Nov 23, 2014, 11:22:45 PM11/23/14

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Comment #33 on issue 3575 by : net:

Sorry, I'm pretty new. How do I do a lock around net.cgoLookupIPCNAME?

unread,

Nov 24, 2014, 12:01:04 AM11/24/14

to

Comment #34 on issue 3575 by : net:

Sorry for the double post but this one includes more details. How do I do a
lock around net.cgoLookupIPCNAME?

When I try the workaround as suggested in #32 I get:
"go install runtime: open /usr/local/go/pkg/linux_amd64/runtime.a:
permission denied".

If I sudo then it seems to work but then when I try to install other
packages I get:

"go install container/list: open
/usr/local/go/pkg/linux_amd64/container/list.a: permission denied
go install unicode/utf8: open /usr/local/go/pkg/linux_amd64/unicode/utf8.a:
permission denied
go install crypto/subtle: open
/usr/local/go/pkg/linux_amd64/crypto/subtle.a: permission denied
go install hash: open /usr/local/go/pkg/linux_amd64/hash.a: permission
denied
go install unicode: open /usr/local/go/pkg/linux_amd64/unicode.a:
permission denied".

I then uninstalled then reinstalled Go. Am I doing something wrong here?
Using Linux Mint 17.

unread,

Nov 24, 2014, 10:59:17 AM11/24/14

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Comment #35 on issue 3575 by : net: LookupHost("localhost")

The question about permission errors with "go install runtime" doesn't have
anything to do with this issue. Please take that question to golang-nuts.
(It should work as long as you are consistent about the user running "go
install" but please do not reply here.)

golang dial tcp lookup host

Golang dial tcp: lookup no such host

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