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Subject [GitHub] [pulsar] shiv4289 opened a new pull request #3840: issue#3838 : Allow incompatible schemas to co-exist on a topic, allow…
Date Sat, 16 Mar 2019 16:13:21 GMT
shiv4289 opened a new pull request #3840: issue#3838 : Allow incompatible schemas to co-exist
on a topic, allow…
URL: https://github.com/apache/pulsar/pull/3840
 
 
   … set-schema-autoupdate-strategy = none
   
   Problem:
   ========
   The set-schema-autoupdate-strategy policy currently allows disabling schema update (--disabled)
and one of --compatibility(FULL, BACKWARD, FORWARD). There is no way to currently allow multiple
schemas for a topic.
   
   Solution:
   ========
   It would be useful to allow --compatibility so the schemas can be added without checking
with the previous schemas. This allows for extra flexibility for instance having multiple
objects on a topic, supports use cases like a simple event bus etc.
   
   <--
   ### Contribution Checklist
     
     - Name the pull request in the form "[Issue XYZ][component] Title of the pull request",
where *XYZ* should be replaced by the actual issue number.
       Skip *Issue XYZ* if there is no associated github issue for this pull request.
       Skip *component* if you are unsure about which is the best component. E.g. `[docs]
Fix typo in produce method`.
   
     - Fill out the template below to describe the changes contributed by the pull request.
That will give reviewers the context they need to do the review.
     
     - Each pull request should address only one issue, not mix up code from multiple issues.
     
     - Each commit in the pull request has a meaningful commit message
   
     - Once all items of the checklist are addressed, remove the above text and this checklist,
leaving only the filled out template below.
   
   **(The sections below can be removed for hotfixes of typos)**
   -->
   
   *(If this PR fixes a github issue, please add `Fixes #<xyz>`.)*
   
   Fixes #<xyz>
   
   *(or if this PR is one task of a github issue, please add `Master Issue: #<xyz>`
to link to the master issue.)*
   
   Master Issue: #<xyz>
   
   ### Motivation
   
   
   *Explain here the context, and why you're making that change. What is the problem you're
trying to solve.*
   
   ### Modifications
   
   *Describe the modifications you've done.*
   
   ### Verifying this change
   
   - [ ] Make sure that the change passes the CI checks.
   
   *(Please pick either of the following options)*
   
   This change is a trivial rework / code cleanup without any test coverage.
   
   *(or)*
   
   This change is already covered by existing tests, such as *(please describe tests)*.
   
   *(or)*
   
   This change added tests and can be verified as follows:
   
   *(example:)*
     - *Added integration tests for end-to-end deployment with large payloads (10MB)*
     - *Extended integration test for recovery after broker failure*
   
   ### Does this pull request potentially affect one of the following parts:
   
   *If `yes` was chosen, please highlight the changes*
   
     - Dependencies (does it add or upgrade a dependency): (yes / no)
     - The public API: (yes / no)
     - The schema: (yes / no / don't know)
     - The default values of configurations: (yes / no)
     - The wire protocol: (yes / no)
     - The rest endpoints: (yes / no)
     - The admin cli options: (yes / no)
     - Anything that affects deployment: (yes / no / don't know)
   
   ### Documentation
   
     - Does this pull request introduce a new feature? (yes / no)
     - If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
     - If a feature is not applicable for documentation, explain why?
     - If a feature is not documented yet in this PR, please create a followup issue for adding
the documentation
   

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