tuteng opened a new pull request #6641: [hotfix]Python function protobuf missing field URL: https://github.com/apache/pulsar/pull/6641 ### Motivation At present, in the test, we found that due to the addition of a field `forwardSourceMessageProperty` in the proto file of function, this field was lost in the proto file generated by python and go. Due to python parsing with the following code: ``` json_format.Parse(args.function_details, function_details) ``` the following exception will be thrown. ``` 2020-03-30T13:13:25.2339031Z 13:13:24.379 [pulsar-external-listener-20-1] INFO org.apache.pulsar.functions.runtime.process.ProcessRuntime - Started process successfully 2020-03-30T13:13:25.2339190Z Traceback (most recent call last): 2020-03-30T13:13:25.2340782Z File "/pulsar/instances/python-instance/python_instance_main.py", line 211, in <module> 2020-03-30T13:13:25.2340944Z main() 2020-03-30T13:13:25.2342589Z File "/pulsar/instances/python-instance/python_instance_main.py", line 98, in main 2020-03-30T13:13:25.2342744Z json_format.Parse(args.function_details, function_details) 2020-03-30T13:13:25.2354119Z File "/usr/local/lib/python2.7/dist-packages/google/protobuf/json_format.py", line 430, in Parse 2020-03-30T13:13:25.2354284Z return ParseDict(js, message, ignore_unknown_fields, descriptor_pool) 2020-03-30T13:13:25.2354689Z File "/usr/local/lib/python2.7/dist-packages/google/protobuf/json_format.py", line 450, in ParseDict 2020-03-30T13:13:25.2354882Z parser.ConvertMessage(js_dict, message) 2020-03-30T13:13:25.2355386Z File "/usr/local/lib/python2.7/dist-packages/google/protobuf/json_format.py", line 481, in ConvertMessage 2020-03-30T13:13:25.2355537Z self._ConvertFieldValuePair(value, message) 2020-03-30T13:13:25.2356082Z File "/usr/local/lib/python2.7/dist-packages/google/protobuf/json_format.py", line 590, in _ConvertFieldValuePair 2020-03-30T13:13:25.2356559Z raise ParseError('Failed to parse {0} field: {1}.'.format(name, e)) 2020-03-30T13:13:25.2357199Z google.protobuf.json_format.ParseError: Failed to parse sink field: Message type "proto.SinkSpec" has no field named "forwardSourceMessageProperty". 2020-03-30T13:13:25.2357634Z Available Fields(except extensions): ['className', 'configs', 'typeClassName', 'topic', 'serDeClassName', 'builtin', 'schemaType']. ``` This pr is mainly to fix the proto file generated by python first. In order to make the test pass smoothly, I will gradually fix this problem in other languages in the next pull request. ### Modifications * Enable build docker image to pulsar and pulsar-all. * Add new generated protobuf file for python ### Verifying this change The integration process passed https://github.com/AmateurEvents/pulsar/pull/22
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