[GitHub] [beam] damccorm opened a new issue, #21604: Add TO_STRING capability to Go SDK

[GitBox <gi...@apache.org>]

damccorm opened a new issue, #21604:
URL: https://github.com/apache/beam/issues/21604

   Go SDK doesn't yet implement TO_STRING, which is necessary for runner hotkey debugging among other things.
   
   URN description:
   https://github.com/apache/beam/blob/master/model/pipeline/src/main/proto/org/apache/beam/model/pipeline/v1/beam_runner_api.proto#L329
   
   Involves adding the capability URN "beam:transform:to_string:v1" to the goCapabilities list in graphx/translate.go and the paired handling in exec/translate.go along with the appropriate node to convert elements to strings using fmt.
   
   Using fmt allows user element types to have String() implemented, which will then appear as normal. However, we should also print out the %T for the type, to make it unambiguous for users to know the type of the hot key, which will reduce debugging turn around.
   
   AFAIK only used with Dataflow when "Hot Key Logging" https://cloud.devsite.corp.google.com/dataflow/docs/reference/pipeline-options#debugging is enabled, and there's no closed form runner test for this at present.
   
   Imported from Jira [BEAM-14512](https://issues.apache.org/jira/browse/BEAM-14512). Original Jira may contain additional context.
   Reported by: lostluck.


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: github-unsubscribe@beam.apache.org.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org