yuxiqian opened a new pull request, #3972:
URL: https://github.com/apache/flink-cdc/pull/3972

   This closes FLINK-37578 and #3858.
   
   There's a subtle sequential bug in both `SchemaCoordinator`s after a schema 
evolve coordination process finishes. Coordinator may finish operators' 
blocking state first before restoring internal state properly, which may 
accidentally expose unwanted internal states or freeze the entire pipeline job.
   
   @linjianchang's optimization in #3858 is actually correct, however it 
increases the chance of this glitch. Baked the original commit into this PR to 
test if it works well.


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