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https://issues.apache.org/jira/browse/CALCITE-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1341:
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Fix Version/s: (was: avatica-1.10.0)
avatica-1.11.0
> Improve mechanism for client/server to unwrap protobuf RPC message
> ------------------------------------------------------------------
>
> Key: CALCITE-1341
> URL: https://issues.apache.org/jira/browse/CALCITE-1341
> Project: Calcite
> Issue Type: Improvement
> Components: avatica
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Critical
> Fix For: avatica-1.11.0
>
>
> We just ran into a funny bug in PHOENIX-3136 as a fallout of some changes
> which relocated Avatica classes.
> Because the Avatica RPC classes were also relocated (from
> org.apache.calcite.avatica to org.apache.phoenix.org.apache.calcite.avatica),
> clients of an older version could no longer communicate with a server of the
> newer version (and vice versa). This stems from a decision made where the
> wire API included the class name of the Request and Response Java protobuf
> class in the message. The server would send back the Response class name with
> the relocated name, but the client would not know what that class is (because
> it doesn't have the same relocation). In other words, the current protobuf
> serialization approach requires that Avatica classes are not shaded and
> relocated.
> The JSON serialization doesn't have this problem because it uses the
> {{JsonSubType}} Jackson annotation to map the Request/Response class to a
> logical name (e.g. OpenConnectionResponse to openConnection).
> We could do a similar approach for protobuf that the JSON serialization does
> (maintain this mapping and guarantee that it is not changed incompatibly).
> Long-term, I believe I'd like to see specific Requests dispatched to certain
> URLs (instead of all HTTP requests send to {{/}}) and do away with this
> additional logic in the serialization layer, but I'm not sure if we have to
> re-architect the URL scheme just to fix this issue in the near-term.
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