Nico Kruber created FLINK-27836:
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Summary: RocksDBMapState iteration may stop too early for
var-length prefixes
Key: FLINK-27836
URL: https://issues.apache.org/jira/browse/FLINK-27836
Project: Flink
Issue Type: Bug
Components: Runtime / State Backends
Affects Versions: 1.14.4, 1.13.6, 1.15.0
Reporter: Nico Kruber
A similar, yet orthogonal, issue to
https://issues.apache.org/jira/browse/FLINK-11141 is that the iterators used in
RocksDBMapState iterate over everything with a matching prefix of flink-key and
namespace. With var-length serializers for either of them, however, it may
return data for unrelated keys and/or namespaces.
It looks like the built-in serializers of Flink are not affected though since
they use a var-length encoding that is prefixed with the object's length and
thus different lengths will not have the same prefix. More exotic serializers,
e.g. relying on a terminating NUL character, may expose the above-mentioned
behaviour, though.
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