What is the purpose of the change

In HadoopPathBasedBulkWriter, getSize will invoke FileSystem.exists and FileSystem.getFileStatus, but it is invoked per record.
There will be lots of visits to HDFS, may make HDFS pressure too high.

Brief change log

Creating a new HiveRollingPolicy:

• Getting size of the file is too expensive. See HiveBulkWriterFactory#create. We can't check for every element, which will cause great pressure on DFS. Therefore, in this implementation, only check the file size in shouldRollOnProcessingTime, which can effectively avoid DFS pressure.

Verifying this change

Manually testing.

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/Mesos, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no