echauchot commented on pull request #19059:
URL: https://github.com/apache/flink/pull/19059#issuecomment-1066696748


   @zentol, I analyzed the problem. `OperationTimeoutException` happens at the 
client side (Cassandra driver) under load but the timeouts raised seem to be 
not enough. So I reduced the load by avoiding "IF EXIST" in CQL requests and 
mode important I replaced `drop keyspace` by `drop table`. Indeed, each 
`Before` updates the tableID and it is called even in case or retrials. So, we 
need to drop only the created table for this test (with the same tableID) and 
not the whole keyspace. That will reduce the overall load on  cassandra but 
also fix the `keyspace does not exist` flaky issue.
   
   Finally I put `testRetrialDropTable` back to check that everything still 
works in case of retrial (drop the single table instead of keyspace etc...)
   
   I did 10 local runs of the whole CassandraITCase with no error.
   
   PTAL
   


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