tsreaper opened a new pull request #17259:
URL: https://github.com/apache/flink/pull/17259
## What is the purpose of the change
In FLINK-23289 we add a not null checking for BinarySection. After the
change the default constructor of BinaryStringData will now construct a
BinaryStringData with null Java object and null BinarySection. This is
different from the behavior before where the default constructor constructs an
empty binary string.
Although BinaryStringData is an internal class, it might confuse some
developers (actually I myself have been confused) if they build their programs
around this class. So we should make the default constructor construct an empty
binary string again without breaking the not null checking.
## Brief change log
- Make default constructor of BinaryStringData construct an empty binary
string again
## Verifying this change
This change added tests and can be verified by running the added tests.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: no
- The serializers: no
- The runtime per-record code paths (performance sensitive): no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
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