hbase.exceptions.RequestError: org.apache.hadoop.hbase.exceptions.UnknownProtocolException

[rainard]

hbase 2.1.0 python 3.6

my code

import hbase 
zk = '172.25.33.230:2181,172.25.33.231:2181,172.25.33.232:2181'


def test():
    with hbase.ConnectionPool( zk ).connect() as conn:
        table = conn['hbase']['TraceV2']

        table.count()
    exit()

if __name__ == '__main__':
    test()

Exception as below :

Traceback (most recent call last):
  File "D:/wehotel_product/untitled/test-hbase/main.py", line 18, in <module>
    test()
  File "D:/wehotel_product/untitled/test-hbase/main.py", line 13, in test
    table.count()
  File "D:\wehotel_product\untitled\venv\lib\site-packages\hbase\table.py", line 204, in count
    batch_size=500
  File "D:\wehotel_product\untitled\venv\lib\site-packages\hbase\table.py", line 477, in __next__
    batch = self._client.iter_scanner(self.scanner)
  File "D:\wehotel_product\untitled\venv\lib\site-packages\hbase\client\client.py", line 1259, in iter_scanner
    region = self._region_manager.get_region(scanner.__table__, start_key)
  File "D:\wehotel_product\untitled\venv\lib\site-packages\hbase\client\region.py", line 199, in get_region
    region = self._region_lookup(meta_key)
  File "D:\wehotel_product\untitled\venv\lib\site-packages\hbase\client\region.py", line 258, in _region_lookup
    resp = self._meta_service.request(req)
  File "D:\wehotel_product\untitled\venv\lib\site-packages\hbase\services\services.py", line 61, in request
    return self._request.call(pb_req)
  File "D:\wehotel_product\untitled\venv\lib\site-packages\hbase\services\request.py", line 192, in call
    raise exceptions.RequestError(error)
hbase.exceptions.RequestError: org.apache.hadoop.hbase.exceptions.UnknownProtocolException

when I check the response , find header error info

call_id: 0
exception {
  exception_class_name: "org.apache.hadoop.hbase.exceptions.UnknownProtocolException"
  stack_trace: "org.apache.hadoop.hbase.exceptions.UnknownProtocolException: Is this a pre-hbase-1.0.0 or asynchbase client? Client is invoking getClosestRowBefore removed in hbase-2.0.0 replaced by reverse Scan.\n\tat org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2445)\n\tat org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:41998)\n\tat org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:409)\n\tat org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130)\n\tat org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324)\n\tat org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)\n"
  do_not_retry: true
}

there any problem ? please help me