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https://issues.apache.org/jira/browse/BEAM-5421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16619360#comment-16619360
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Robert Burke commented on BEAM-5421:
------------------------------------
Thank you for trying this out, and filing an issue!
Does it work when you register the predicate function?
func init() {
beam.RegisterFunction(islongWord)
}
I'm in transit currently, otherwise I'd confirm this myself.
> filter.Exclude is panicking
> ---------------------------
>
> Key: BEAM-5421
> URL: https://issues.apache.org/jira/browse/BEAM-5421
> Project: Beam
> Issue Type: Bug
> Components: sdk-go
> Affects Versions: 2.6.0
> Environment: Mac, Linux
> Reporter: Vadym
> Assignee: Robert Burke
> Priority: Major
>
> {code:java}
> package main
> import (
> "context"
> "github.com/apache/beam/sdks/go/pkg/beam"
> "github.com/apache/beam/sdks/go/pkg/beam/io/textio"
> "github.com/apache/beam/sdks/go/pkg/beam/log"
> "github.com/apache/beam/sdks/go/pkg/beam/transforms/filter"
> "github.com/apache/beam/sdks/go/pkg/beam/x/beamx"
> )
> func islongWord(s string) bool {
> return len(s) < 3
> }
> func main() {
> beam.Init()
> ctx := context.Background()
> p, s := beam.NewPipelineWithRoot()
> words := beam.Create(s, "a", "b", "long", "alsolong")
> long := filter.Exclude(s, words, islongWord)
> textio.Write(s, "long.txt", long)
> if err := beamx.Run(ctx, p); err != nil {
> log.Exitf(ctx, "Failed to execute job: %v", err)
> }
> }
> {code}
> The code above fails with the error message:
> {{2018/09/18 15:47:23 Failed to execute job: panic: reflect: Call using
> []uint8 as type string goroutine 1 [running]:}}
>
> The code was taken from Exclude example in the documentation:
> https://godoc.org/github.com/apache/beam/sdks/go/pkg/beam/transforms/filter#Exclude
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