cannot use go mod

[nnsgmsone]

Describe the problem

I want to use go mod to refer to cockroach, but it failed. The error message is

"go/pkg/mod/github.com/cockroachdb/[email protected]+incompatible/pkg/util/tracing/shadow.go:48:12: undefined: zipkintracer.Collector"

To Reproduce

I tried to quote the cockroach package, this is part of my go mod file:

replace (
github.com/cockroachdb/apd => github.com/cockroachdb/apd/v2 v2.0.2-0.20190505045354-5843f9b6a583
go.etcd.io/etcd => go.etcd.io/etcd v0.5.0-alpha.5.0.20191113212143-63dd73c1869f
)

[bobvawter]

Duplicate of #38824

[charlesvdv]

I also stumbled on this issue when trying to import github.com/cockroachdb/cockroach/pkg/sql/parser. For future reference, here is the fix:

Add in your go.mod:

replace github.com/openzipkin-contrib/zipkin-go-opentracing => github.com/openzipkin-contrib/zipkin-go-opentracing v0.3.5

The problem comes from the fact that zipkin-go-opentracing has broken backward compatibility somewhere between v0.3.5 and v0.4.5 and for some reason (not a go module expert), the go module system is taking the v0.4.5 when cockroach uses the v0.3.5.