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  • KIP-216: IQ should throw different exceptions for different errors
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Working In Process


Current state[One of "Under Discussion", "Accepted", "Rejected"]

Discussion thread: here

JIRA KAFKA-5876 - Getting issue details... STATUS

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).


As the moment the IQ is only thrown InvalidStateStoreException for all errors. That means we cannot handle different types of errors. We should throw different exceptions for different types.

Proposed Changes

There two types of IQ errors:

  • StateStoreMigratedException
  • StateStoreClosedException

Compatibility, Deprecation, and Migration Plan

  • Because no classes will be removed, this change will be fully backward.

Rejected Alternatives


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