wesam created CASSANDRA-21618:
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             Summary: Add node to mixed cdc_enabled cluster can cause schema 
disagreement
                 Key: CASSANDRA-21618
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21618
             Project: Apache Cassandra
          Issue Type: Bug
            Reporter: wesam
         Attachments: Add node to mixed cdc.docx

We have clusters setup with multi-DC, where DC1 set cdc_enabled to True and 
unset in DC2 which is going to the default False.

Adding nodes to DC2 cause schema disagreement due to cdc value in the 
system_schema.tables will be set to null while it is set to True in other nodes 
schema.

 

https://issues.apache.org/jira/browse/CASSANDRA-19948 is not looking to fix 
this issue.

Observation from C*4.0 and 5.0 attached



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