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net: cgoLookupIPCNAME doesn't try again for temporary failures in getaddrinfo() #5338

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anacrolix opened this Issue Apr 23, 2013 · 9 comments

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anacrolix commented Apr 23, 2013 

go version devel +55f0ec9b3c00 Mon Apr 22 22:09:11 2013 -0700 linux/amd64

Heavy usage of net.Dial via net/http.Get gives errors stringifying as " Temporary
failure in name resolution" which corresponds to EAI_AGAIN returned from
getaddrinfo().

I expect net.Dial to retry on this error code.

I'm using 6g on Linux.

No effort is made to set the IsTimeout member of DNSError at the callsite
http://code.google.com/p/go/source/browse/src/pkg/net/cgo_unix.go#98, and an appropriate
IsTemporary variable is not available.
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rsc commented Jul 30, 2013

Comment 2:

When should it try again? I'm kind of confused.

Labels changed: added priority-later, go1.2maybe, removed priority-triage.

Status changed to Accepted.
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rsc commented Jul 30, 2013

Comment 3:

Labels changed: added feature.
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anacrolix commented Jul 31, 2013

Comment 4:

When calling getaddrinfo, EAI_AGAIN should be retried in synchronous calling code no?
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robpike commented Aug 20, 2013

Comment 5:

Deferring to 1.3.

Labels changed: added go1.3maybe, removed go1.2maybe.
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robpike commented Aug 20, 2013

Comment 6:

Labels changed: removed go1.3maybe.
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rsc commented Nov 27, 2013

Comment 7:

Labels changed: added go1.3maybe.
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rsc commented Nov 27, 2013

Comment 8:

Labels changed: removed feature.
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rsc commented Dec 4, 2013

Comment 9:

Labels changed: added release-none, removed go1.3maybe.
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rsc commented Dec 4, 2013

Comment 10:

Labels changed: added repo-main.

@anacrolix anacrolix added accepted labels Dec 4, 2013

@rsc rsc added this to the Unplanned milestone Apr 10, 2015

@rsc rsc removed priority-later labels Apr 10, 2015

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