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Checklist

  • User Stories Documented
  • User Stories Reviewed
  • Design Reviewed
  • APIs reviewed
  • Release priorities assigned
  • Test cases reviewed
  • Blog post

Introduction 

Error handling in CDAP is important for better user experience. One of the challenge is to standardize error messages 

Goals

There are four goals which needs to be achieved to improve error handling:

  • Add framework to wrangler and data pipeline to provide error codes along with error messages for better user experience.

Scenarios

  • Scenario 1: Error codes in Wrangler

    • Scenario 1.1

Alice wants to wrangle data using CDAP's Wrangler tool. As part of that, Alice wants to connect to Database Source using Wrangler Connection. While attempting to do that, Alice is seeing a cryptic error message while testing the connection that she does not know how to resolve just by looking at the error message. In order figure out cause of the issue and recommended action, Alice will like to browse error code catalog with the error code displayed along with the error message.

    • Scenario 1.2

Alice is applying transformations to the data on the fly using CDAP's Wrangler tool. However, while applying transformations, Alice sees an error message that does not suggest recommended action to fix the issue. She wants to browse the error code catalog to figure out recommended action to resolve the issue.

    • Scenario 1.3

Alice wants to wrangle data using CDAP's Wrangler tool. While applying transformations to the connected source data on the fly, Alice tries to parse boolean column as csv. However, Alice observes that built-in directives to parse boolean data as csv and avro returns different error messages. Alice would like to see standard error message from both the directives when column type is incompatible.

    • Scenario 1.4

Alice wants to wrangle data using CDAP's Wrangler tool. While connecting to the source Alice uses user name and password stored in secure store. However, the secure store keys are not resolved. Alice wants to look at the error code and share it with the CDAP developer to figure out the underlying root cause.

  • Scenario 2: Error codes in Pipeline

    • Scenario 2.1

Alice is a pipeline developer who has built a pipeline using CDAP data pipeline studio. While running the pipeline, it failed with no meaningful error message in logs.To debug this issue further, Alice wants to share error code from the logs with Bob, the data pipeline app developer to figure out what is the cause of the error.

    • Scenario 2.2

As a data pipeline developer, Alice is trying to get schema from the database source. While attempting to do that from CDAP data pipeline studio, Alice sees an error message. In order to figure out the cause and action for the error message, Alice will like to search the error code in the error catalog.

    • Scenario 2.3

As a data pipeline developer, Alice is trying to validate the pipeline. While attempting to validate it, Alice saw an error message that requires fixing the plugin property. Alice want to have an error code along with the error message so that she can search the probable cause on error catalog.

    • Scenario 2.4

As a data pipeline developer, Alice is using secure macros in the pipeline, however, the secure macros are not resolved. Alice wants to use the error code and share it with CDAP developer to figure out the root cause.

  • Scenario 3: Error codes in CDAP

    • Scenario 3.1

As a CDAP user, Alice wants to upload a plugin to CDAP. However, Alice is not deploy a plugin and gets an error. Alice wants to use the error code to browse the catalog to figure out the cause and recommended action.

    • Scenario 3.2

As a CDAP user, Alice wants to enable Wrangler to wrangle data. However, Wrangler service is not starting up.Alice wants to use the error code so that it can be shared with the support engineer for further debugging.

    • Scenario 3.3

As a CDAP user, Alice wants to enable Wrangler to wrangle data. However, Wrangler service is not starting up.Alice wants to use the error code so that it can be shared with CDAP developer to figure out the root cause.

Design


Approach


Impact on UI


Test Scenarios

Test ID

Test Description

Expected Results













Bug Fixes 

Releases

Release 6.1.0

Related Work

Future work

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