yuxiqian opened a new pull request, #3583:
URL: https://github.com/apache/flink-cdc/pull/3583

   We should applySchemaChange (where the route rule works) first and 
lenientize its result then, or we may not be able to get evolved schema since 
tableId isn't routed:
   
   ```
   Caused by: java.lang.IllegalStateException: Evolved schema does not exist, 
not ready for schema change event AddColumnEvent{tableId=kunni_test.customers, 
addedColumns=[ColumnWithPosition{column=`newCol2` VARCHAR(100), position=AFTER, 
existedColumnName=newCol}]}
        at 
org.apache.flink.cdc.runtime.operators.schema.coordinator.SchemaRegistryRequestHandler.lambda$lenientizeSchemaChangeEvent$3(SchemaRegistryRequestHandler.java:378)
        at java.util.Optional.orElseThrow(Optional.java:290)
        at 
org.apache.flink.cdc.runtime.operators.schema.coordinator.SchemaRegistryRequestHandler.lenientizeSchemaChangeEvent(SchemaRegistryRequestHandler.java:376)
        at 
org.apache.flink.cdc.runtime.operators.schema.coordinator.SchemaRegistryRequestHandler.calculateDerivedSchemaChangeEvents(SchemaRegistryRequestHandler.java:360)
        at 
org.apache.flink.cdc.runtime.operators.schema.coordinator.SchemaRegistryRequestHandler.handleSchemaChangeRequest(SchemaRegistryRequestHandler.java:184)
        at 
org.apache.flink.cdc.runtime.operators.schema.coordinator.SchemaRegistry.lambda$handleCoordinationRequest$3(SchemaRegistry.java:273)
        ... 4 more
   ```


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