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Some clean up
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TODO

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demo_script.md

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@@ -594,22 +594,3 @@ docker-compose exec mysql mysql -Dsql-demo -usql-demo -pdemo-sql
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SELECT * FROM REGION_STATS ORDER BY hour_of_day, region;
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```
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# Outlook
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# TODOs
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# Issues
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* Why are queries canceled by the client shown as failed in the Flink UI?
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* Metaspace error when executing a query.
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[ERROR] Could not execute SQL statement. Reason:
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java.lang.OutOfMemoryError: Metaspace
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--> "Fixed" by `docker-compose restart jobmanager taskmanager`
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* Not all queries are cancelled in Flink if they are stopped in the client

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