Matthew Jacobs created KUDU-1881:
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Summary: Deserializing scan token should check nullability of
column
Key: KUDU-1881
URL: https://issues.apache.org/jira/browse/KUDU-1881
Project: Kudu
Issue Type: Bug
Components: client
Affects Versions: 1.2.0
Reporter: Matthew Jacobs
Assignee: Dan Burkert
Priority: Critical
Fix For: 1.3.0
When deserializing a scan token, the projection schema must be validated
against that of the table to ensure projected columns haven't been changed.
While the data types are validated, the nullability of those columns is not. If
a column 's' with nullable=false is dropped and then add 's' with
nullable='true' (or visa-versa), clients will expect tuples to have the wrong
memory layout. Systems like Impala that memcpy the tuples directly can crash as
a result.
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