hangc0276 opened a new issue #12241:
URL: https://github.com/apache/pulsar/issues/12241
**Describe the bug**
Python 2 and Python 3 generate object schema without sort in different
behavior.
Take the following class for example
```Python
class T2(Record):
b = Integer()
a = Integer()
d = String()
c = Double()
```
Python2 generated field schema:
```
[{'type': ['null', 'int'], 'name': 'a'}, {'type': ['null', 'double'],
'name': 'c'}, {'type': ['null', 'int'], 'name': 'b'}, {'type': ['null',
'string'], 'name': 'd'}]
```
Python3 generated field schema:
```
[{'type': ['null', 'int'], 'name': 'b'}, {'type': ['null', 'int'], 'name':
'a'}, {'type': ['null', 'string'], 'name': 'd'}, {'type': ['null', 'double'],
'name': 'c'}]
```
Python3 generated field schema in POJO field define order, but Python2
generated field schema order is not. It is the dict key order for the field
name.
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