RocksDBStateBackendTests::test_get_set_number_of_transfering_threads fails on azure

 =================================== FAILURES ===================================
 _____ RocksDBStateBackendTests.test_get_set_number_of_transfering_threads ______

 self = <pyflink.datastream.tests.test_state_backend.RocksDBStateBackendTests testMethod=test_get_set_ number_of_transfering_threads>

     def test_get_set_number_of_transfering_threads(self):

         state_backend = RocksDBStateBackend("file://var/checkpoints/")

 >       self.assertEqual(state_backend.get_number_of_transfering_threads(), 1)
 E       AssertionError: 4 != 1

 pyflink/datastream/tests/test_state_backend.py:185: AssertionError

[ERROR] Failures:
[ERROR]   ConfigOptionsDocsCompletenessITCase.testCompleteness:76->compareDocumentedAndExistingOption s:220 Documentation is outdated, please regenerate it according to the instructions in flink-docs/README.md.
   Problems:
           Documentation of state.backend.rocksdb.checkpoint.transfer.thread.num in RocksDBOptions is  outdated. Expected: default=(4) description=(The number of threads (per stateful operator) used to transfer (download and upload) files in RocksD BStateBackend.).
           Documented option state.backend.rocksdb.checkpoint.transfer.thread.num does not exist.
           Documented option state.backend.rocksdb.checkpoint.transfer.thread.num does not exist.