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          Clean up TransportResizeAction
          #137471
        
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    Clean up TransportResizeAction
  
  #137471
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Mainly this is about removing the trappy implicit default master node timeout in resize (shrink/split/clone) requests as per elastic#107984, but also we drop the unnecessary `ActionType` subclass and the test-only `ResizeRequestBuilder`, migrating the affected tests over to a new `ResizeIndexTestUtils` instead. We also fix the order of index-name arguments and make the `ResizeType` a mandatory parameter rather than (trappily) defaulting to `SHRINK`.
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           Pinging @elastic/es-data-management (Team:Data Management)  | 
    
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I'm a fan of these changes, thanks a lot, David! I've left a few comments, but they're only nits.
| public enum ResizeIndexTestUtils { | ||
| ; | 
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Is there value in having this be an enum instead of a class (optionally with a private empty constructor)?
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Don't know really - we seem to do both and this is fewer LoC since you don't have to add the private empty constructor.
        
          
                ...ms/src/internalClusterTest/java/org/elasticsearch/datastreams/TSDBPassthroughIndexingIT.java
          
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                ...rc/internalClusterTest/java/org/elasticsearch/action/admin/indices/create/ShrinkIndexIT.java
              
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                ...rc/internalClusterTest/java/org/elasticsearch/action/admin/indices/create/ShrinkIndexIT.java
          
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                ...erTest/java/org/elasticsearch/cluster/routing/allocation/decider/DiskThresholdDeciderIT.java
          
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      | ); | ||
| } | ||
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| private CreateIndexRequest targetIndexRequest; | 
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Did you consider making this field final as well? It's only reassigned by ResizeRequest#setTargetIndex, which, as of this PR, is only used two times in ResizeRequestTests. This isn't a blocker for me, I'm fine leaving it as-is.
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I did but tbh these tests are kinda questionable, and I didn't really want to rework them enough to avoid mutating this field. It's not a huge deal, really it's a bigger problem that the fields within CreateIndexRequest are themselves mutable, but that's a problem for another day.
        
          
                server/src/test/java/org/elasticsearch/action/admin/indices/shrink/ResizeRequestTests.java
          
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                .../src/test/java/org/elasticsearch/action/admin/indices/shrink/TransportResizeActionTests.java
          
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                ...lugin/logsdb/src/internalClusterTest/java/org/elasticsearch/xpack/logsdb/LogsIndexingIT.java
          
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                ...t/java/org/elasticsearch/xpack/security/authz/interceptor/ResizeRequestInterceptorTests.java
              
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LGTM, thanks David.
Mainly this is about removing the trappy implicit default master node
timeout in resize (shrink/split/clone) requests as per #107984, but also
we drop the unnecessary
ActionTypesubclass and the test-onlyResizeRequestBuilder, migrating the affected tests over to a newResizeIndexTestUtilsinstead. We also fix the order of index-namearguments and make the
ResizeTypea mandatory parameter rather than(trappily) defaulting to
SHRINK.