Ewan Higgs created HDFS-11026:
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Summary: Convert BlockTokenIdentifier to use Protobuf
Key: HDFS-11026
URL: https://issues.apache.org/jira/browse/HDFS-11026
Project: Hadoop HDFS
Issue Type: Task
Components: hdfs, hdfs-client
Affects Versions: 3.0.0-alpha1, 2.9.0
Reporter: Ewan Higgs
{{BlockTokenIdentifier}} currently uses a {{DataInput}}/{{DataOutput}}
(basically a {{byte[]}}) and manual serialization to get data into and out of
the encrypted buffer (in {{BlockKeyProto}}). Other TokenIdentifiers (e.g.
{{ContainerTokenIdentifier}}, {{AMRMTokenIdentifier}}) use Protobuf. The
{{BlockTokenIdenfitier}} should use Protobuf as well so it can be expanded more
easily and will be consistent with the rest of the system.
NB: Release of this will require a version update since 2.8.x won't be able to
decipher {{BlockKeyProto.keyBytes}} from 2.8.y.
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