[PR] Fix EqualsGetClass warnings and enable Error Prone check [beam]

Tue, 03 Mar 2026 23:57:26 -0800 


stankiewicz opened a new pull request, #37758:
URL: https://github.com/apache/beam/pull/37758

   What this PR does: This pull request enables the EqualsGetClass check from 
Error Prone and resolves all existing violations across the codebase.
   
   Specific changes:
   
   -Removed `EqualsGetClass` from the disabledChecks list in the 
`BeamModulePlugin.groovy` configuration to enforce it going forward.
   - Refactored `equals`  methods in numerous classes across various modules 
(including nexmark, flink runners, and others) to use standard `instanceof` 
checks rather than exact runtime class matching `(getClass() != o.getClass())`. 
   
   This change better aligns with standard Java equality semantics and 
addresses the Error Prone warning Prefer instanceof to getClass when 
implementing Object#equals
   ------------------------
   
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