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https://issues.apache.org/jira/browse/BEAM-6838?focusedWorklogId=216541&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-216541
 ]

ASF GitHub Bot logged work on BEAM-6838:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 20/Mar/19 23:53
            Start Date: 20/Mar/19 23:53
    Worklog Time Spent: 10m 
      Work Description: youngoli commented on pull request #8064: [BEAM-6838] 
Go SDK: Improving error msgs in pipeline serialization.
URL: https://github.com/apache/beam/pull/8064#discussion_r267590477
 
 

 ##########
 File path: sdks/go/pkg/beam/core/runtime/graphx/serialize.go
 ##########
 @@ -257,22 +257,22 @@ func decodeFn(u *v1.Fn) (*graph.Fn, error) {
        if u.Fn != nil {
                fn, err := decodeUserFn(u.Fn)
                if err != nil {
-                       return nil, fmt.Errorf("bad userfn: %v", err)
+                       return nil, fmt.Errorf("failed to decode function proto 
%v, bad userfn: %v", u, err)
                }
                fx, err := funcx.New(reflectx.MakeFunc(fn))
                if err != nil {
-                       return nil, fmt.Errorf("bad userfn: %v", err)
+                       return nil, fmt.Errorf("failed to decode function proto 
%v, bad userfn: %v", u, err)
 
 Review comment:
   Done, with a little added detail:
   
   ("failed to decode DoFn %v, failed to construct userfn: %v", u, err)
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 216541)
    Time Spent: 5.5h  (was: 5h 20m)

> Improve error messages for unregistered protos
> ----------------------------------------------
>
>                 Key: BEAM-6838
>                 URL: https://issues.apache.org/jira/browse/BEAM-6838
>             Project: Beam
>          Issue Type: Sub-task
>          Components: sdk-go
>            Reporter: Daniel Oliveira
>            Assignee: Daniel Oliveira
>            Priority: Minor
>          Time Spent: 5.5h
>  Remaining Estimate: 0h
>
> When users have a type that can't be serialized (it has a function Field or 
> similar) or more complex protocol buffers, the error should be improved to 
> display the type being registered, and better yet, the beam.RegisterType(...) 
> code they can use to enable use of their type.



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